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Cryptography Toolkit

A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.

This toolkit has been built with educational purposes in mind!
It is meant to play around with different schemes and algorithms to understand how they work.
However, you must be extremely careful when using real/live/mainnet data/keys/credentials!
A web browser usually is not a safe environment to either create strong cryptographic keys and/or paste sensitive information into. So consider yourself warned.

Live version

Tools

Send Thanks

Created by Oliver Gugger:

  • BTC tip address: bc1qfgua5vhwm6myajak9p4crhwmwm2k6mczf789eh

About

A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.

guggero.github.io/cryptography-toolkit/

Resources

Readme
MIT license
Activity

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85 stars

Watchers

7 watching

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46 forks
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
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;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - guggero/cryptography-toolkit: A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND. · GitHub
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Cryptography Toolkit
A web-based collection of cryptography tools for schemes/algorithms used in
Bitcoin and LND.
This toolkit has been built with educational purposes in mind!

It is meant to play around with different schemes and algorithms to understand how they work.

However, you must be extremely careful when using real/live/mainnet data/keys/credentials!

A web browser usually is not a safe environment to either create strong cryptographic keys and/or
paste sensitive information into. So consider yourself warned.
Live version
Tools
Send Thanks
Created by Oliver Gugger:
  • BTC tip address: bc1qfgua5vhwm6myajak9p4crhwmwm2k6mczf789eh
About
A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.
guggero.github.io/cryptography-toolkit/
Resources
Readme
MIT license
Activity
Stars
85 stars
Watchers
7 watching
Forks
46 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - guggero/cryptography-toolkit: A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND. · GitHub
Skip to content
BranchesTags
Repository files navigation
Cryptography Toolkit
A web-based collection of cryptography tools for schemes/algorithms used in
Bitcoin and LND.
This toolkit has been built with educational purposes in mind!

It is meant to play around with different schemes and algorithms to understand how they work.

However, you must be extremely careful when using real/live/mainnet data/keys/credentials!

A web browser usually is not a safe environment to either create strong cryptographic keys and/or
paste sensitive information into. So consider yourself warned.
Live version
Tools
Send Thanks
Created by Oliver Gugger:
  • BTC tip address: bc1qfgua5vhwm6myajak9p4crhwmwm2k6mczf789eh
About
A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.
guggero.github.io/cryptography-toolkit/
Resources
Readme
MIT license
Activity
Stars
85 stars
Watchers
7 watching
Forks
46 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - guggero/cryptography-toolkit: A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND. · GitHub
Skip to content
BranchesTags
Repository files navigation
Cryptography Toolkit
A web-based collection of cryptography tools for schemes/algorithms used in
Bitcoin and LND.
This toolkit has been built with educational purposes in mind!

It is meant to play around with different schemes and algorithms to understand how they work.

However, you must be extremely careful when using real/live/mainnet data/keys/credentials!

A web browser usually is not a safe environment to either create strong cryptographic keys and/or
paste sensitive information into. So consider yourself warned.
Live version
Tools
Send Thanks
Created by Oliver Gugger:
  • BTC tip address: bc1qfgua5vhwm6myajak9p4crhwmwm2k6mczf789eh
About
A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.
guggero.github.io/cryptography-toolkit/
Resources
Readme
MIT license
Activity
Stars
85 stars
Watchers
7 watching
Forks
46 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - guggero/cryptography-toolkit: A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND. · GitHub
Skip to content
BranchesTags
Repository files navigation
Cryptography Toolkit
A web-based collection of cryptography tools for schemes/algorithms used in
Bitcoin and LND.
This toolkit has been built with educational purposes in mind!

It is meant to play around with different schemes and algorithms to understand how they work.

However, you must be extremely careful when using real/live/mainnet data/keys/credentials!

A web browser usually is not a safe environment to either create strong cryptographic keys and/or
paste sensitive information into. So consider yourself warned.
Live version
Tools
Send Thanks
Created by Oliver Gugger:
  • BTC tip address: bc1qfgua5vhwm6myajak9p4crhwmwm2k6mczf789eh
About
A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.
guggero.github.io/cryptography-toolkit/
Resources
Readme
MIT license
Activity
Stars
85 stars
Watchers
7 watching
Forks
46 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - guggero/cryptography-toolkit: A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND. · GitHub
Skip to content
BranchesTags
Repository files navigation
Cryptography Toolkit
A web-based collection of cryptography tools for schemes/algorithms used in
Bitcoin and LND.
This toolkit has been built with educational purposes in mind!

It is meant to play around with different schemes and algorithms to understand how they work.

However, you must be extremely careful when using real/live/mainnet data/keys/credentials!

A web browser usually is not a safe environment to either create strong cryptographic keys and/or
paste sensitive information into. So consider yourself warned.
Live version
Tools
Send Thanks
Created by Oliver Gugger:
  • BTC tip address: bc1qfgua5vhwm6myajak9p4crhwmwm2k6mczf789eh
About
A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.
guggero.github.io/cryptography-toolkit/
Resources
Readme
MIT license
Activity
Stars
85 stars
Watchers
7 watching
Forks
46 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - guggero/cryptography-toolkit: A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND. · GitHub
Skip to content
BranchesTags
Repository files navigation
Cryptography Toolkit
A web-based collection of cryptography tools for schemes/algorithms used in
Bitcoin and LND.
This toolkit has been built with educational purposes in mind!

It is meant to play around with different schemes and algorithms to understand how they work.

However, you must be extremely careful when using real/live/mainnet data/keys/credentials!

A web browser usually is not a safe environment to either create strong cryptographic keys and/or
paste sensitive information into. So consider yourself warned.
Live version
Tools
Send Thanks
Created by Oliver Gugger:
  • BTC tip address: bc1qfgua5vhwm6myajak9p4crhwmwm2k6mczf789eh
About
A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.
guggero.github.io/cryptography-toolkit/
Resources
Readme
MIT license
Activity
Stars
85 stars
Watchers
7 watching
Forks
46 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
GitHub - guggero/cryptography-toolkit: A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND. · GitHub
Skip to content
BranchesTags
Repository files navigation
Cryptography Toolkit
A web-based collection of cryptography tools for schemes/algorithms used in
Bitcoin and LND.
This toolkit has been built with educational purposes in mind!

It is meant to play around with different schemes and algorithms to understand how they work.

However, you must be extremely careful when using real/live/mainnet data/keys/credentials!

A web browser usually is not a safe environment to either create strong cryptographic keys and/or
paste sensitive information into. So consider yourself warned.
Live version
Tools
Send Thanks
Created by Oliver Gugger:
  • BTC tip address: bc1qfgua5vhwm6myajak9p4crhwmwm2k6mczf789eh
About
A web-based collection of cryptography tools for schemes/algorithms used in Bitcoin and LND.
guggero.github.io/cryptography-toolkit/
Resources
Readme
MIT license
Activity
Stars
85 stars
Watchers
7 watching
Forks
46 forks
Report repository
Releases
Packages
Used by
Contributors
Languages