ICO Generator
Click to upload pictures
It is recommended that square images be used to get the best result.
Output size
Windows common sizes
Upload image to show preview
Upload an image, choose 8 to 256px icon sizes, and download a favicon.ico plus PNG icon pack for websites, desktop shortcuts, and app icons.
Related
What is an ICO icon?
ICO is an icon container format that can hold several bitmap images at different sizes inside one .ico file. Browsers, Windows, and desktop environments choose the most suitable size for the current display context.
A favicon.ico is commonly placed at the website root to show a site icon in browser tabs, bookmarks, history, and sometimes search surfaces. Modern sites often pair it with PNG icons, Apple Touch Icon, and a Web App Manifest.
This page focuses on converting an existing logo or image into a multi-size ICO, not drawing an icon from scratch. It is useful when you already have a source image and need a deployable favicon quickly.
Use Cases
- Convert a website logo into favicon.ico for browser tabs and bookmarks.
- Create multi-size ICO files for Windows desktop shortcuts, folders, or software icons.
- Prepare 128px, 180px, and 256px PNG assets for PWA or mobile web projects.
- Turn a PNG or WEBP design export into a deployable frontend favicon file.
- Check whether 16px and 32px icons remain readable before launching a site.
How to Use
- Upload a square PNG, JPG, WEBP, or BMP image; a 256px or larger source is recommended.
- Select the icon sizes you need; most websites should include at least 16, 32, 48, and 256px.
- Preview the generated sizes on the right and confirm the smallest icons are still recognizable.
- Generate and download: one size returns an .ico file, multiple sizes return a zip with .ico and PNG files.
Features
- Multi-size ICO output: choose 8, 16, 24, 32, 40, 48, 64, 72, 96, 128, 180, and 256px for tabs, desktops, and app contexts.
- Image to favicon.ico: convert browser-readable PNG, JPG, WEBP, BMP, and similar image files into a standard ICO file.
- ICO plus PNG zip: when multiple sizes are selected, the download includes the .ico file and each generated PNG size.
- Local browser processing: Canvas resizing and ICO packaging happen on your device, so logos and brand assets are not uploaded.
- Size preview before export: inspect small icons before downloading so detailed logos do not disappear at 16px.
FAQ
How do I convert PNG or JPG to ICO?
Upload an image, select the sizes you need, and generate the ICO. With multiple sizes selected, the ICO contains several PNG images so browsers and systems can pick the best fit.
Which favicon sizes should I choose?
A practical website set is 16, 32, 48, 64, and 256px. 16px supports classic tabs, 32px supports sharper tabs and bookmarks, 48px helps Windows, and 256px covers high-resolution icons.
Does this tool generate 512px icons?
This page generates ICO sizes from 8 to 256px. For a 512px PWA or app-store image, create a separate 512px PNG with the image resize tool and use it in your manifest or submission package.
Will transparent backgrounds be preserved?
Yes. If the source PNG or WEBP has an alpha channel, the resized PNG data keeps transparent pixels and the generated ICO keeps the transparent background.
Are my icons uploaded to a server?
No. Image loading, resizing, ICO creation, and zip packaging run locally in the browser, which is useful for private logos and unreleased brand assets.
Why does my tiny favicon look blurry?
Favicons are very small. Text-heavy or detailed logos often collapse at 16px. Use a square source, clear edges, enough padding, and check the 16px and 32px previews before exporting.
Glossary
- favicon
- A site icon shown in browser tabs, bookmarks, history, and related browser surfaces.
- ICO
- A Windows icon container format that can include multiple image sizes and color depths in one file.
- Multi-size icon
- A set of pixel sizes for the same icon so browsers and operating systems can pick a sharper version for each display density.
ICO Size Reference
| Size | Common use | Recommendation |
|---|---|---|
8px | Very small icons | Only for special compatibility cases |
16px | Browser tabs | Essential favicon size |
32px | Sharp tabs and bookmarks | Common default for modern websites |
48px | Windows icons | Useful for desktop and file managers |
64px / 96px | High-DPI displays | Keeps larger icon views sharp |
128px / 180px | PWA and Apple Touch adjacent assets | Useful as PNG icon pack sizes |
256px | High-resolution ICO | Large Windows icons and dense displays |
Upload And Download Notes
| Item | Support | Notes |
|---|---|---|
| Input formats | PNG / JPG / WEBP / BMP and more | Depends on browser image decoding support |
| ICO output | Yes | One file can contain multiple sizes |
| PNG output | Yes | Multi-size downloads include PNG files in the zip |
| Processing location | Local browser | Files are not uploaded to a server |
| Source recommendation | Square 256px+ | Small favicon sizes stay clearer |
Authoritative References
- ReferenceMDN - favicon
- ReferenceWikipedia - ICO file format
- ReferenceRealFaviconGenerator - favicon reference
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