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Faviconizer

A free online tool to convert any image into a favicon. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.

This is a fun, personal project I built mostly to try out SvelteKit with Svelte 5 and Tailwind CSS v4. I also created it because I was annoyed that there isn't a simple, non-bloated online tool to do this.

I don't have any further plans for it, but I hope it can be useful to someone!

Live at faviconizer.com

Features

  • Drag-and-drop or file picker upload
  • Automatic square detection (skips cropping for square images)
  • Built-in cropping tool for non-square images
  • Configurable output size (8px to 128px)
  • Multiple output formats: ICO, PNG, JPG
  • Dark mode support
  • Rate limiting and automatic file cleanup

Tech Stack

Getting Started

Prerequisites

  • Bun (or Node.js 18+)
  • A Supabase project with a favicons storage bucket
  • An Upstash Redis instance

Setup

  1. Clone the repository:
git clone https://github.com/Rednegniw/faviconizer.git
cd faviconizer
  1. Install dependencies:
bun install
  1. Copy the example environment file and fill in your values:
cp .env.example .env

See .env.example for all required variables.

  1. Start the dev server:
bun run dev

Available Scripts

CommandDescription
bun run devStart development server
bun run buildBuild for production
bun run previewPreview production build
bun run checkRun Svelte type checking
bun run lintRun linter and formatter check
bun run formatFormat code with Prettier

License

MIT

About

A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.

faviconizer.com

Topics

faviconfavicon-generatorfree-toolicoimage-convertersveltesveltekitweb-tool

Resources

Readme
MIT license
Activity

Stars

2 stars

Watchers

1 watching

Forks

0 forks
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(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 - Rednegniw/faviconizer: A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format. · GitHub
Skip to content
BranchesTags
Repository files navigation
Faviconizer
A free online tool to convert any image into a favicon. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
This is a fun, personal project I built mostly to try out SvelteKit with Svelte 5 and Tailwind CSS v4. I also created it because I was annoyed that there isn't a simple, non-bloated online tool to do this.
I don't have any further plans for it, but I hope it can be useful to someone!
Live at faviconizer.com
Features
  • Drag-and-drop or file picker upload
  • Automatic square detection (skips cropping for square images)
  • Built-in cropping tool for non-square images
  • Configurable output size (8px to 128px)
  • Multiple output formats: ICO, PNG, JPG
  • Dark mode support
  • Rate limiting and automatic file cleanup
Tech Stack
Getting Started
Prerequisites
  • Bun (or Node.js 18+)
  • A Supabase project with a favicons storage bucket
  • An Upstash Redis instance
Setup
  1. Clone the repository:
git clone https://github.com/Rednegniw/faviconizer.git
cd faviconizer
  1. Install dependencies:
bun install
  1. Copy the example environment file and fill in your values:
cp .env.example .env
See .env.example for all required variables.
  1. Start the dev server:
bun run dev
Available Scripts
CommandDescription
bun run devStart development server
bun run buildBuild for production
bun run previewPreview production build
bun run checkRun Svelte type checking
bun run lintRun linter and formatter check
bun run formatFormat code with Prettier
License
MIT
About
A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
faviconizer.com
Topics
faviconfavicon-generatorfree-toolicoimage-convertersveltesveltekitweb-tool
Resources
Readme
MIT license
Activity
Stars
2 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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 - Rednegniw/faviconizer: A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format. · GitHub
Skip to content
BranchesTags
Repository files navigation
Faviconizer
A free online tool to convert any image into a favicon. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
This is a fun, personal project I built mostly to try out SvelteKit with Svelte 5 and Tailwind CSS v4. I also created it because I was annoyed that there isn't a simple, non-bloated online tool to do this.
I don't have any further plans for it, but I hope it can be useful to someone!
Live at faviconizer.com
Features
  • Drag-and-drop or file picker upload
  • Automatic square detection (skips cropping for square images)
  • Built-in cropping tool for non-square images
  • Configurable output size (8px to 128px)
  • Multiple output formats: ICO, PNG, JPG
  • Dark mode support
  • Rate limiting and automatic file cleanup
Tech Stack
Getting Started
Prerequisites
  • Bun (or Node.js 18+)
  • A Supabase project with a favicons storage bucket
  • An Upstash Redis instance
Setup
  1. Clone the repository:
git clone https://github.com/Rednegniw/faviconizer.git
cd faviconizer
  1. Install dependencies:
bun install
  1. Copy the example environment file and fill in your values:
cp .env.example .env
See .env.example for all required variables.
  1. Start the dev server:
bun run dev
Available Scripts
CommandDescription
bun run devStart development server
bun run buildBuild for production
bun run previewPreview production build
bun run checkRun Svelte type checking
bun run lintRun linter and formatter check
bun run formatFormat code with Prettier
License
MIT
About
A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
faviconizer.com
Topics
faviconfavicon-generatorfree-toolicoimage-convertersveltesveltekitweb-tool
Resources
Readme
MIT license
Activity
Stars
2 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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 - Rednegniw/faviconizer: A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format. · GitHub
Skip to content
BranchesTags
Repository files navigation
Faviconizer
A free online tool to convert any image into a favicon. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
This is a fun, personal project I built mostly to try out SvelteKit with Svelte 5 and Tailwind CSS v4. I also created it because I was annoyed that there isn't a simple, non-bloated online tool to do this.
I don't have any further plans for it, but I hope it can be useful to someone!
Live at faviconizer.com
Features
  • Drag-and-drop or file picker upload
  • Automatic square detection (skips cropping for square images)
  • Built-in cropping tool for non-square images
  • Configurable output size (8px to 128px)
  • Multiple output formats: ICO, PNG, JPG
  • Dark mode support
  • Rate limiting and automatic file cleanup
Tech Stack
Getting Started
Prerequisites
  • Bun (or Node.js 18+)
  • A Supabase project with a favicons storage bucket
  • An Upstash Redis instance
Setup
  1. Clone the repository:
git clone https://github.com/Rednegniw/faviconizer.git
cd faviconizer
  1. Install dependencies:
bun install
  1. Copy the example environment file and fill in your values:
cp .env.example .env
See .env.example for all required variables.
  1. Start the dev server:
bun run dev
Available Scripts
CommandDescription
bun run devStart development server
bun run buildBuild for production
bun run previewPreview production build
bun run checkRun Svelte type checking
bun run lintRun linter and formatter check
bun run formatFormat code with Prettier
License
MIT
About
A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
faviconizer.com
Topics
faviconfavicon-generatorfree-toolicoimage-convertersveltesveltekitweb-tool
Resources
Readme
MIT license
Activity
Stars
2 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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 - Rednegniw/faviconizer: A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format. · GitHub
Skip to content
BranchesTags
Repository files navigation
Faviconizer
A free online tool to convert any image into a favicon. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
This is a fun, personal project I built mostly to try out SvelteKit with Svelte 5 and Tailwind CSS v4. I also created it because I was annoyed that there isn't a simple, non-bloated online tool to do this.
I don't have any further plans for it, but I hope it can be useful to someone!
Live at faviconizer.com
Features
  • Drag-and-drop or file picker upload
  • Automatic square detection (skips cropping for square images)
  • Built-in cropping tool for non-square images
  • Configurable output size (8px to 128px)
  • Multiple output formats: ICO, PNG, JPG
  • Dark mode support
  • Rate limiting and automatic file cleanup
Tech Stack
Getting Started
Prerequisites
  • Bun (or Node.js 18+)
  • A Supabase project with a favicons storage bucket
  • An Upstash Redis instance
Setup
  1. Clone the repository:
git clone https://github.com/Rednegniw/faviconizer.git
cd faviconizer
  1. Install dependencies:
bun install
  1. Copy the example environment file and fill in your values:
cp .env.example .env
See .env.example for all required variables.
  1. Start the dev server:
bun run dev
Available Scripts
CommandDescription
bun run devStart development server
bun run buildBuild for production
bun run previewPreview production build
bun run checkRun Svelte type checking
bun run lintRun linter and formatter check
bun run formatFormat code with Prettier
License
MIT
About
A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
faviconizer.com
Topics
faviconfavicon-generatorfree-toolicoimage-convertersveltesveltekitweb-tool
Resources
Readme
MIT license
Activity
Stars
2 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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 - Rednegniw/faviconizer: A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format. · GitHub
Skip to content
BranchesTags
Repository files navigation
Faviconizer
A free online tool to convert any image into a favicon. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
This is a fun, personal project I built mostly to try out SvelteKit with Svelte 5 and Tailwind CSS v4. I also created it because I was annoyed that there isn't a simple, non-bloated online tool to do this.
I don't have any further plans for it, but I hope it can be useful to someone!
Live at faviconizer.com
Features
  • Drag-and-drop or file picker upload
  • Automatic square detection (skips cropping for square images)
  • Built-in cropping tool for non-square images
  • Configurable output size (8px to 128px)
  • Multiple output formats: ICO, PNG, JPG
  • Dark mode support
  • Rate limiting and automatic file cleanup
Tech Stack
Getting Started
Prerequisites
  • Bun (or Node.js 18+)
  • A Supabase project with a favicons storage bucket
  • An Upstash Redis instance
Setup
  1. Clone the repository:
git clone https://github.com/Rednegniw/faviconizer.git
cd faviconizer
  1. Install dependencies:
bun install
  1. Copy the example environment file and fill in your values:
cp .env.example .env
See .env.example for all required variables.
  1. Start the dev server:
bun run dev
Available Scripts
CommandDescription
bun run devStart development server
bun run buildBuild for production
bun run previewPreview production build
bun run checkRun Svelte type checking
bun run lintRun linter and formatter check
bun run formatFormat code with Prettier
License
MIT
About
A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
faviconizer.com
Topics
faviconfavicon-generatorfree-toolicoimage-convertersveltesveltekitweb-tool
Resources
Readme
MIT license
Activity
Stars
2 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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 - Rednegniw/faviconizer: A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format. · GitHub
Skip to content
BranchesTags
Repository files navigation
Faviconizer
A free online tool to convert any image into a favicon. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
This is a fun, personal project I built mostly to try out SvelteKit with Svelte 5 and Tailwind CSS v4. I also created it because I was annoyed that there isn't a simple, non-bloated online tool to do this.
I don't have any further plans for it, but I hope it can be useful to someone!
Live at faviconizer.com
Features
  • Drag-and-drop or file picker upload
  • Automatic square detection (skips cropping for square images)
  • Built-in cropping tool for non-square images
  • Configurable output size (8px to 128px)
  • Multiple output formats: ICO, PNG, JPG
  • Dark mode support
  • Rate limiting and automatic file cleanup
Tech Stack
Getting Started
Prerequisites
  • Bun (or Node.js 18+)
  • A Supabase project with a favicons storage bucket
  • An Upstash Redis instance
Setup
  1. Clone the repository:
git clone https://github.com/Rednegniw/faviconizer.git
cd faviconizer
  1. Install dependencies:
bun install
  1. Copy the example environment file and fill in your values:
cp .env.example .env
See .env.example for all required variables.
  1. Start the dev server:
bun run dev
Available Scripts
CommandDescription
bun run devStart development server
bun run buildBuild for production
bun run previewPreview production build
bun run checkRun Svelte type checking
bun run lintRun linter and formatter check
bun run formatFormat code with Prettier
License
MIT
About
A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
faviconizer.com
Topics
faviconfavicon-generatorfree-toolicoimage-convertersveltesveltekitweb-tool
Resources
Readme
MIT license
Activity
Stars
2 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
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 - Rednegniw/faviconizer: A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format. · GitHub
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Faviconizer
A free online tool to convert any image into a favicon. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
This is a fun, personal project I built mostly to try out SvelteKit with Svelte 5 and Tailwind CSS v4. I also created it because I was annoyed that there isn't a simple, non-bloated online tool to do this.
I don't have any further plans for it, but I hope it can be useful to someone!
Live at faviconizer.com
Features
  • Drag-and-drop or file picker upload
  • Automatic square detection (skips cropping for square images)
  • Built-in cropping tool for non-square images
  • Configurable output size (8px to 128px)
  • Multiple output formats: ICO, PNG, JPG
  • Dark mode support
  • Rate limiting and automatic file cleanup
Tech Stack
Getting Started
Prerequisites
  • Bun (or Node.js 18+)
  • A Supabase project with a favicons storage bucket
  • An Upstash Redis instance
Setup
  1. Clone the repository:
git clone https://github.com/Rednegniw/faviconizer.git
cd faviconizer
  1. Install dependencies:
bun install
  1. Copy the example environment file and fill in your values:
cp .env.example .env
See .env.example for all required variables.
  1. Start the dev server:
bun run dev
Available Scripts
CommandDescription
bun run devStart development server
bun run buildBuild for production
bun run previewPreview production build
bun run checkRun Svelte type checking
bun run lintRun linter and formatter check
bun run formatFormat code with Prettier
License
MIT
About
A free online tool to convert any image into a favicon without hassle or ads. Upload an image, crop it if needed, and download a favicon in ICO, PNG, or JPG format.
faviconizer.com
Topics
faviconfavicon-generatorfree-toolicoimage-convertersveltesveltekitweb-tool
Resources
Readme
MIT license
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