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JSON Formatter w. DR urns support

Chrome extension for printing JSON and JSONP nicely when you visit it 'directly' in a browser tab.

Use this key to sign extension.

Features

  • DR urn support
  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON
  • Parsed JSON is exported as a global variable, json, so you can inspect it in the console

A background worker is used to prevent the UI freezing when processing very long JSON pages.

Installation

Option 1 – just install it from the Chrome Web Store.

Option 2 – install it from source:

  • clone/download this repo,
  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension folder in this repo.

Some URLs to try it on:

FAQ

Why are large numbers not displayed accurately?

This is a limitation of JavaScript (and therefore JSON). The largest possible number is Number.MAX_SAFE_INTEGER, or 9007199254740991. If you try to use a number larger than this in JavaScript/JSON, you'll lose accuracy.

The idea of JSON Formatter is to show you how the computer sees your JSON, so we don't attempt to circumvent this limitation, otherwise that would give a misleading representation of your data. It's better to see exactly what V8 sees.

If you want to use long sequences of digits in your JSON, then quote them as strings.

Why are object keys sometimes in the wrong order?

What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees.

Plain JavaScript objects are unordered collections of properties. If you go through them with for...in, for example, there is no guarantee of any particular order. In practice, most engines maintain the order in which the keys were first declared, but V8 moves any numeric keys (e.g. "1234") to the front, for a small performance gain. This was a controversial issue – a lot of people think it sucks that you can't predict key enumeration order in Chrome – but the V8 team refused to 'fix' it, because it's not a bug, and they're right. If you want your values to be in a certain order, and you're relying on the non-standard key-ordering logic of a particular engine, then your code is broken. Restructure your data to use arrays.

But I just want it to be in order for readability

That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow. And it's not a good idea to go down the road of representing the data differently from how the engine actually sees it.

About

Makes JSON/JSONP easy to read.

Resources

Readme
Activity
Custom properties

Stars

0 stars

Watchers

25 watching

Forks

1 fork
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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JSON Formatter w. DR urns support
Chrome extension for printing JSON and JSONP nicely when you visit it 'directly' in a browser tab.
Use this key to sign extension.
Features
  • DR urn support
  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON
  • Parsed JSON is exported as a global variable, json, so you can inspect it in the console
A background worker is used to prevent the UI freezing when processing very long JSON pages.
Installation
Option 1 – just install it from the Chrome Web Store.
Option 2 – install it from source:
  • clone/download this repo,
  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension folder in this repo.
Some URLs to try it on:
FAQ
Why are large numbers not displayed accurately?
This is a limitation of JavaScript (and therefore JSON). The largest possible number is Number.MAX_SAFE_INTEGER, or 9007199254740991. If you try to use a number larger than this in JavaScript/JSON, you'll lose accuracy.
The idea of JSON Formatter is to show you how the computer sees your JSON, so we don't attempt to circumvent this limitation, otherwise that would give a misleading representation of your data. It's better to see exactly what V8 sees.
If you want to use long sequences of digits in your JSON, then quote them as strings.
Why are object keys sometimes in the wrong order?
What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees.
Plain JavaScript objects are unordered collections of properties. If you go through them with for...in, for example, there is no guarantee of any particular order. In practice, most engines maintain the order in which the keys were first declared, but V8 moves any numeric keys (e.g. "1234") to the front, for a small performance gain. This was a controversial issue – a lot of people think it sucks that you can't predict key enumeration order in Chrome – but the V8 team refused to 'fix' it, because it's not a bug, and they're right. If you want your values to be in a certain order, and you're relying on the non-standard key-ordering logic of a particular engine, then your code is broken. Restructure your data to use arrays.
But I just want it to be in order for readability
That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow. And it's not a good idea to go down the road of representing the data differently from how the engine actually sees it.
About
Makes JSON/JSONP easy to read.
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
25 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Repository files navigation
JSON Formatter w. DR urns support
Chrome extension for printing JSON and JSONP nicely when you visit it 'directly' in a browser tab.
Use this key to sign extension.
Features
  • DR urn support
  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON
  • Parsed JSON is exported as a global variable, json, so you can inspect it in the console
A background worker is used to prevent the UI freezing when processing very long JSON pages.
Installation
Option 1 – just install it from the Chrome Web Store.
Option 2 – install it from source:
  • clone/download this repo,
  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension folder in this repo.
Some URLs to try it on:
FAQ
Why are large numbers not displayed accurately?
This is a limitation of JavaScript (and therefore JSON). The largest possible number is Number.MAX_SAFE_INTEGER, or 9007199254740991. If you try to use a number larger than this in JavaScript/JSON, you'll lose accuracy.
The idea of JSON Formatter is to show you how the computer sees your JSON, so we don't attempt to circumvent this limitation, otherwise that would give a misleading representation of your data. It's better to see exactly what V8 sees.
If you want to use long sequences of digits in your JSON, then quote them as strings.
Why are object keys sometimes in the wrong order?
What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees.
Plain JavaScript objects are unordered collections of properties. If you go through them with for...in, for example, there is no guarantee of any particular order. In practice, most engines maintain the order in which the keys were first declared, but V8 moves any numeric keys (e.g. "1234") to the front, for a small performance gain. This was a controversial issue – a lot of people think it sucks that you can't predict key enumeration order in Chrome – but the V8 team refused to 'fix' it, because it's not a bug, and they're right. If you want your values to be in a certain order, and you're relying on the non-standard key-ordering logic of a particular engine, then your code is broken. Restructure your data to use arrays.
But I just want it to be in order for readability
That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow. And it's not a good idea to go down the road of representing the data differently from how the engine actually sees it.
About
Makes JSON/JSONP easy to read.
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
25 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Repository files navigation
JSON Formatter w. DR urns support
Chrome extension for printing JSON and JSONP nicely when you visit it 'directly' in a browser tab.
Use this key to sign extension.
Features
  • DR urn support
  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON
  • Parsed JSON is exported as a global variable, json, so you can inspect it in the console
A background worker is used to prevent the UI freezing when processing very long JSON pages.
Installation
Option 1 – just install it from the Chrome Web Store.
Option 2 – install it from source:
  • clone/download this repo,
  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension folder in this repo.
Some URLs to try it on:
FAQ
Why are large numbers not displayed accurately?
This is a limitation of JavaScript (and therefore JSON). The largest possible number is Number.MAX_SAFE_INTEGER, or 9007199254740991. If you try to use a number larger than this in JavaScript/JSON, you'll lose accuracy.
The idea of JSON Formatter is to show you how the computer sees your JSON, so we don't attempt to circumvent this limitation, otherwise that would give a misleading representation of your data. It's better to see exactly what V8 sees.
If you want to use long sequences of digits in your JSON, then quote them as strings.
Why are object keys sometimes in the wrong order?
What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees.
Plain JavaScript objects are unordered collections of properties. If you go through them with for...in, for example, there is no guarantee of any particular order. In practice, most engines maintain the order in which the keys were first declared, but V8 moves any numeric keys (e.g. "1234") to the front, for a small performance gain. This was a controversial issue – a lot of people think it sucks that you can't predict key enumeration order in Chrome – but the V8 team refused to 'fix' it, because it's not a bug, and they're right. If you want your values to be in a certain order, and you're relying on the non-standard key-ordering logic of a particular engine, then your code is broken. Restructure your data to use arrays.
But I just want it to be in order for readability
That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow. And it's not a good idea to go down the road of representing the data differently from how the engine actually sees it.
About
Makes JSON/JSONP easy to read.
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
25 watching
Forks
1 fork
Report repository
Releases
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Contributors
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Repository files navigation
JSON Formatter w. DR urns support
Chrome extension for printing JSON and JSONP nicely when you visit it 'directly' in a browser tab.
Use this key to sign extension.
Features
  • DR urn support
  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON
  • Parsed JSON is exported as a global variable, json, so you can inspect it in the console
A background worker is used to prevent the UI freezing when processing very long JSON pages.
Installation
Option 1 – just install it from the Chrome Web Store.
Option 2 – install it from source:
  • clone/download this repo,
  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension folder in this repo.
Some URLs to try it on:
FAQ
Why are large numbers not displayed accurately?
This is a limitation of JavaScript (and therefore JSON). The largest possible number is Number.MAX_SAFE_INTEGER, or 9007199254740991. If you try to use a number larger than this in JavaScript/JSON, you'll lose accuracy.
The idea of JSON Formatter is to show you how the computer sees your JSON, so we don't attempt to circumvent this limitation, otherwise that would give a misleading representation of your data. It's better to see exactly what V8 sees.
If you want to use long sequences of digits in your JSON, then quote them as strings.
Why are object keys sometimes in the wrong order?
What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees.
Plain JavaScript objects are unordered collections of properties. If you go through them with for...in, for example, there is no guarantee of any particular order. In practice, most engines maintain the order in which the keys were first declared, but V8 moves any numeric keys (e.g. "1234") to the front, for a small performance gain. This was a controversial issue – a lot of people think it sucks that you can't predict key enumeration order in Chrome – but the V8 team refused to 'fix' it, because it's not a bug, and they're right. If you want your values to be in a certain order, and you're relying on the non-standard key-ordering logic of a particular engine, then your code is broken. Restructure your data to use arrays.
But I just want it to be in order for readability
That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow. And it's not a good idea to go down the road of representing the data differently from how the engine actually sees it.
About
Makes JSON/JSONP easy to read.
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
25 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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extension
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README.md
config.rb
config.rb
Repository files navigation
JSON Formatter w. DR urns support
Chrome extension for printing JSON and JSONP nicely when you visit it 'directly' in a browser tab.
Use this key to sign extension.
Features
  • DR urn support
  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON
  • Parsed JSON is exported as a global variable, json, so you can inspect it in the console
A background worker is used to prevent the UI freezing when processing very long JSON pages.
Installation
Option 1 – just install it from the Chrome Web Store.
Option 2 – install it from source:
  • clone/download this repo,
  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension folder in this repo.
Some URLs to try it on:
FAQ
Why are large numbers not displayed accurately?
This is a limitation of JavaScript (and therefore JSON). The largest possible number is Number.MAX_SAFE_INTEGER, or 9007199254740991. If you try to use a number larger than this in JavaScript/JSON, you'll lose accuracy.
The idea of JSON Formatter is to show you how the computer sees your JSON, so we don't attempt to circumvent this limitation, otherwise that would give a misleading representation of your data. It's better to see exactly what V8 sees.
If you want to use long sequences of digits in your JSON, then quote them as strings.
Why are object keys sometimes in the wrong order?
What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees.
Plain JavaScript objects are unordered collections of properties. If you go through them with for...in, for example, there is no guarantee of any particular order. In practice, most engines maintain the order in which the keys were first declared, but V8 moves any numeric keys (e.g. "1234") to the front, for a small performance gain. This was a controversial issue – a lot of people think it sucks that you can't predict key enumeration order in Chrome – but the V8 team refused to 'fix' it, because it's not a bug, and they're right. If you want your values to be in a certain order, and you're relying on the non-standard key-ordering logic of a particular engine, then your code is broken. Restructure your data to use arrays.
But I just want it to be in order for readability
That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow. And it's not a good idea to go down the road of representing the data differently from how the engine actually sees it.
About
Makes JSON/JSONP easy to read.
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
25 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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BranchesTags
Latest commit
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47 Commits
Folders and files
NameName
Last commit message
Last commit date
extension
extension
sass
sass
.gitignore
.gitignore
README.md
README.md
config.rb
config.rb
Repository files navigation
JSON Formatter w. DR urns support
Chrome extension for printing JSON and JSONP nicely when you visit it 'directly' in a browser tab.
Use this key to sign extension.
Features
  • DR urn support
  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON
  • Parsed JSON is exported as a global variable, json, so you can inspect it in the console
A background worker is used to prevent the UI freezing when processing very long JSON pages.
Installation
Option 1 – just install it from the Chrome Web Store.
Option 2 – install it from source:
  • clone/download this repo,
  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension folder in this repo.
Some URLs to try it on:
FAQ
Why are large numbers not displayed accurately?
This is a limitation of JavaScript (and therefore JSON). The largest possible number is Number.MAX_SAFE_INTEGER, or 9007199254740991. If you try to use a number larger than this in JavaScript/JSON, you'll lose accuracy.
The idea of JSON Formatter is to show you how the computer sees your JSON, so we don't attempt to circumvent this limitation, otherwise that would give a misleading representation of your data. It's better to see exactly what V8 sees.
If you want to use long sequences of digits in your JSON, then quote them as strings.
Why are object keys sometimes in the wrong order?
What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees.
Plain JavaScript objects are unordered collections of properties. If you go through them with for...in, for example, there is no guarantee of any particular order. In practice, most engines maintain the order in which the keys were first declared, but V8 moves any numeric keys (e.g. "1234") to the front, for a small performance gain. This was a controversial issue – a lot of people think it sucks that you can't predict key enumeration order in Chrome – but the V8 team refused to 'fix' it, because it's not a bug, and they're right. If you want your values to be in a certain order, and you're relying on the non-standard key-ordering logic of a particular engine, then your code is broken. Restructure your data to use arrays.
But I just want it to be in order for readability
That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow. And it's not a good idea to go down the road of representing the data differently from how the engine actually sees it.
About
Makes JSON/JSONP easy to read.
Resources
Readme
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Custom properties
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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JSON Formatter w. DR urns support
Chrome extension for printing JSON and JSONP nicely when you visit it 'directly' in a browser tab.
Use this key to sign extension.
Features
  • DR urn support
  • JSONP support
  • Fast, even on long pages
  • Works on any valid JSON page – URL doesn't matter
  • Syntax highlighting
  • Collapsible trees, with indent guides
  • Clickable URLs
  • Buttons for switching between raw and parsed JSON
  • Parsed JSON is exported as a global variable, json, so you can inspect it in the console
A background worker is used to prevent the UI freezing when processing very long JSON pages.
Installation
Option 1 – just install it from the Chrome Web Store.
Option 2 – install it from source:
  • clone/download this repo,
  • open Chrome and go to chrome://chrome/extensions/,
  • enable "Developer mode",
  • click "Load unpacked extension",
  • select the extension folder in this repo.
Some URLs to try it on:
FAQ
Why are large numbers not displayed accurately?
This is a limitation of JavaScript (and therefore JSON). The largest possible number is Number.MAX_SAFE_INTEGER, or 9007199254740991. If you try to use a number larger than this in JavaScript/JSON, you'll lose accuracy.
The idea of JSON Formatter is to show you how the computer sees your JSON, so we don't attempt to circumvent this limitation, otherwise that would give a misleading representation of your data. It's better to see exactly what V8 sees.
If you want to use long sequences of digits in your JSON, then quote them as strings.
Why are object keys sometimes in the wrong order?
What you see in JSON Formatter is a representation of the parsed object/array. You see what V8 sees.
Plain JavaScript objects are unordered collections of properties. If you go through them with for...in, for example, there is no guarantee of any particular order. In practice, most engines maintain the order in which the keys were first declared, but V8 moves any numeric keys (e.g. "1234") to the front, for a small performance gain. This was a controversial issue – a lot of people think it sucks that you can't predict key enumeration order in Chrome – but the V8 team refused to 'fix' it, because it's not a bug, and they're right. If you want your values to be in a certain order, and you're relying on the non-standard key-ordering logic of a particular engine, then your code is broken. Restructure your data to use arrays.
But I just want it to be in order for readability
That would require manually parsing the JSON string with regular expressions (instead of using JSON.parse), which would be too slow. And it's not a good idea to go down the road of representing the data differently from how the engine actually sees it.
About
Makes JSON/JSONP easy to read.
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
25 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages