Free Favicon Preview Tester
Check whether a small icon stays readable in tab, bookmark, and mobile preview sizes.
About this tool
A favicon has to work at tiny sizes, which means detailed logos and thin text often disappear. This preview tester loads an image locally and shows it in common contexts such as a browser tab, bookmark row, and mobile-style icon. It helps you decide whether the shape, contrast, and padding are strong enough before generating final favicon files.
How to use it
- Choose a square logo or icon image from your device.
- Review the tab, bookmark, and app-style previews at small sizes.
- If the icon looks crowded, simplify the mark or add padding before exporting final favicon sizes.
Tips and common mistakes
- Avoid tiny words inside favicons because they usually become unreadable in browser tabs.
- Use strong contrast between the icon shape and its background.
- Test dark and light browser themes when the icon depends on subtle edges. If the design only works at large sizes, create a simplified symbol just for favicon use.
FAQ
Does this generate favicon files?
No. It previews readability. Use the Favicon Generator for exported sizes.
Should my source image be square?
A square image gives the most predictable preview.
Is the image uploaded?
No. The preview uses a local object URL in the browser.
Related tools
Previewing does not replace real-browser testing
Check the icon at small tab, bookmark, and mobile-style sizes, then test the deployed favicon in actual browsers and devices. Browser caching can preserve an older icon after deployment. The preview does not generate an ICO package, update HTML tags, clear caches, or verify a live site's manifest.
Create a square PNG at a practical source size with the Favicon Sizes and PNG Generator.