Generate a favicon set _

How browser-based favicon generation works

The entire generation pipeline runs inside your browser tab using the Canvas API and the fflate compression library. No server-side processing, no uploads, no third-party services.

1. Load your source image or render your text or emoji on an offscreen canvas at a high resolution. If you picked an image, it is decoded by the browser natively. If you chose text mode, the page draws your word onto a canvas with the selected font, foreground color, and background color.
2. For each target size (16, 32, 48, 180, 192, 512 pixels), the page creates a fresh offscreen canvas at that exact dimension, then draws the source content onto it using the Canvas API. The browser's built-in image resizing handles the downscale with bilinear or bicubic filtering automatically, producing a sharp favicon at every size.
3. Each canvas is exported to a PNG Blob via canvas.toBlob(). The preview panel shows you all six sizes so you can inspect the result before downloading. A ready-to-paste HTML block and a web-app manifest snippet (manifest.json) are built from the filenames so you can drop them straight into your site head tag.
4. When you click Download ZIP, the page reads every PNG Blob into memory, uses fflate to package them alongside a manifest.json file into a single ZIP archive, and triggers a download with one click. The entire bundle is built in your browser — nothing is uploaded at any stage.

Why generate favicons in your browser?

• A complete favicon set eliminates the browser's favicon-not-found 404 on first visit and ensures your site looks professional in bookmarks, browser tabs, and PWA install screens. Missing sizes mean the browser either loads nothing or falls back to a blurry nearest-neighbour scale.
• The bundled HTML and manifest snippet save you from hand-writing six tags and a JSON manifest block. Paste them into your site head, adjust the paths if needed, and you are done in seconds rather than minutes.
• Client-side generation is the only option on locked-down corporate devices that lack a photo editor. Because nothing uploads, there is no data-leak risk and no compliance review needed for sensitive or branded images.
• Text and emoji mode lets you generate a favicon without any image at all. Type your brand initial, a letter, or an emoji, choose a font and color, and get a full set — perfect for personal projects, prototypes, or sites that just need a placeholder favicon now.

Common favicon generation applications

Every site that people bookmark or install needs a favicon. Here are three scenarios where a browser-based generator saves time.

• Setting up a new landing page or microsite. Generate a full favicon set from a brand logo in under a minute, copy the tags into the site head, and deploy. No design tool required.
• Producing PWA icons for a progressive web app. The 192×192 and 512×512 PNG icons are required for the manifest.json. Generate them alongside the rest of the favicon set in one step rather than resizing a logo manually.
• Creating placeholders for prototypes and staging sites. Type a single letter or emoji, pick a background color, and get realistic favicons without waiting for final brand assets from the design team.

A worked example: generating a favicon set from a company logo

You have a 500×500 PNG logo and need the full favicon set for a new marketing site.

Open this page and drop the logo PNG into the upload zone. The image loads and a preview appears alongside the size grid. Click Generate favicons. The page draws the logo onto six offscreen canvases at 16, 32, 48, 180, 192, and 512 pixels and shows you each result. Below the preview panel, the ready-to-paste HTML block appears with rel="icon" entries for the 16/32/48 sizes, an apple-touch-icon link for the 180 size, and a manifest link for the PWA icons. The manifest snippet below lists the 192 and 512 icons. Click Download ZIP — the page packages all six PNGs plus the manifest.json into a single ZIP archive via fflate. The whole round-trip takes two seconds and consumes no bandwidth beyond the initial page load.

Which favicon sizes does the tool generate?

Six sizes: 16×16, 32×32, and 48×48 for standard browser favicons, 180×180 for the Apple Touch Icon, and 192×192 and 512×512 for PWA manifest icons. Every size is emitted as a PNG. Modern browsers accept PNG favicons via .

Can I generate a favicon from text or an emoji?

Yes. Switch to text or emoji mode, type a word or paste an emoji, pick a font, foreground color, and background color, and click Generate. The text is rendered onto an offscreen canvas at high resolution and then resized to every target favicon size.

Does the image upload to a server?

No. The image never leaves your device. The page uses the browser's File API to read the image into memory and the Canvas API to resize and export every favicon. Open DevTools Network panel while generating — the only outbound requests are the initial page load and ad calls. No image data is transmitted.

What formats are accepted for image upload?

Any format the browser can decode: PNG, JPEG, WebP, GIF, and SVG (rasterized by the browser). The file size limit is 10 MB per upload.

How does the ZIP download work?

The page uses the fflate library (loaded on demand from a shared vendor path) to package all generated PNGs plus the manifest.json into a standard ZIP archive. The packaging happens entirely in browser memory — no upload, no server round-trip. The ZIP is served as a Blob download with one click.

Can I use these favicons on any website?

Yes. The generated PNG favicons work on every modern browser that supports the tag. The 180×180 Apple Touch Icon covers iOS and Safari. The 192×192 and 512×512 PWA icons satisfy the manifest requirements for Chrome on Android and other PWA-supporting browsers.

Is there a true .ico format option?

The current version outputs PNGs because every modern browser accepts them via . A true multi-resolution .ico format is not yet supported and may be added in a future release.