ICO Generator
Build a PNG-in-ICO (16/32/48). Modern browsers accept this.
ICO Generator is its own job in the catalog (utilities): Build a PNG-in-ICO (16/32/48). Modern browsers accept this. It is not a copy of the resizer or converter with a new title — the operation is “ico-gen”.
Controls on this page: preview and download. Output defaults to the format shown.
Processed in your browser. Files are not uploaded.
Supported: JPG, JPEG, PNG, WEBP, GIF, BMP, HEIC, AVIF. Max 25 MB, 1 file.
Related tools
Favicon Generator Advanced
PNG pack: 16, 32, 48, 64, 180, 192, 512 plus a simple ICO.
ICO to PNG
Extract the largest PNG frame from an ICO favicon.
Favicon Generator
Make 16, 32, 48 and 180px PNG favicons from a square-ish source. ICO is not a full multi-resolution Windows icon in this batch.
Aspect Ratio Calculator
Simplify width:height. Works with or without a file.
Image Comparison Tool
Place two images side by side.
Before/After Image Comparison
Slider between original and a light enhance, or two uploaded frames.
ICO Generator runs in this browser with Canvas. The file is not uploaded to imagecropx. Close the tab and the copy in memory is gone.
What this is not
There is no account and no file locker. If a format cannot be written, the tool says so.
How to use ICO Generator
- Choose a file for ICO Generator. It stays on this device.
- Check the preview. Nothing is sent to a server for this step.
- Process, then download. ICO Generator works on one file at a time so the preview stays usable.
Questions about this tool
Does ICO Generator upload my file?
No. Processing is in this browser.
Can I use this on a phone?
Yes, with the same file-size cap (about 25 MB). A large photo is slower on a phone CPU than on a laptop.
Does ICO Generator upload the file?
No. This tool runs in the tab. See Privacy for decoder notes (HEIC, PDF.js worker).
What is the file size cap?
About 25 MB per file. Very large pixel counts are rejected so the tab stays responsive.