PNG to ICO Converter: Free Favicons, No Sign-up, No Upload
Convert PNG to ICO for free, right in your browser. There is no sign-up or login, no watermark, and no upload: your files never leave your device. ICO is the format used for website favicons and Windows app icons, so it is the usual last step when you finish a logo.
The conversion runs natively in your browser with no engine download. ICO supports transparency, so a PNG logo with a see-through background keeps it.
- Free
- No sign-up
- Never uploaded
- No watermark
Your files are converted on your device and never uploaded.
How to convert
- Drag your PNG files onto the page, or use the picker to choose them.
- Choose ICO as the target format.
- Pick a square source image, and review any size options shown for the icon.
- Press convert and wait while your browser processes each file.
- Download a single ICO file directly, or take a batch as one ZIP.
- Check the results, then clear the list to start another batch.
Features
- Runs natively in the browser, with no engine download
- Keeps PNG transparency in the icon
- ICO is used for favicons and Windows icons
- Batch convert and download a ZIP
- No watermark added
- Your PNG files are never sent anywhere
Supported formats
About the formats
About ICO
An ICO file can hold several sizes of one icon in a single file, and it supports transparency. It is used for Windows app icons and website favicons.
Small icons are viewed at tiny sizes, so simple shapes with strong contrast read better than detailed artwork.
Privacy: how it works
- Your PNG files stay on your device. The page reads each file with the browser's file API, converts it with code running in the tab, and hands the result back as a download. No upload happens, so there is no copy of your file on our servers to protect, delete or leak.
- There is nothing to sign up for and no login. The converter does not ask for an email address, and it does not need to know who you are to do its job.
- You can check the claim yourself: open your browser developer tools, watch the Network tab while a file converts, and you will see no request that carries your file.
- Unreleased logos and brand marks stay private, because the icon file is built entirely in your tab.
Tips
- Start from a square PNG, so the icon is not stretched or cropped.
- Use a large, clear source: it will be scaled down a lot.
- Simplify detailed logos for icon use, since fine lines disappear at small sizes.
- Test the favicon on both light and dark browser themes.
- Many modern sites also use PNG or SVG icons, but ICO remains widely supported.
- Keep the original PNG for other uses.
Frequently asked questions
Is it really free?
Yes. There is no price, no trial, no credit card and no watermark added to your results. Ulkaa Tool does the conversion with your own device, so there is no server bill to pass on to you.
Are my files uploaded?
No. Your PNG files are read and converted inside your browser and are never sent to Ulkaa or to anyone else. The result is created on your device and you save it from there.
Do I need an account?
No. There is no sign-up and no login. Open the page, add your files and convert. An Ulkaa account is not needed for anything on this tool.
Is there a file size limit?
No limit is set by us. The real limit is your device: the conversion uses your own memory and processor, so very large files can be slow, and a very big batch may need to be split into smaller runs.