Confirm the file is a real Windows ICO (not a renamed PNG). Re‑export from Icon Converter if needed.

Undo history feels limited.

History is capped in memory for performance. Download a copy before large experimental edits.

Black favicon vanishes on dark browser Chrome.

Use Invert layer / Invert all layers, then export the ZIP which includes *-dark-* PNGs and adaptive HTML link tags.

ICO Icon Editor

Edit ICO files and prepare light/dark favicon variants in your browser. Free online icon editor with PNG pair export.

About this tool

Icon Editor opens Windows ICO files for pixel‑level edits — pencil, eraser, fill, and shapes — and can invert layers for dark‑mode readability, then extract PNGs or rebuild the ICO.

Best for: Touching up existing .ico files, fixing dark‑mode contrast, or exporting per‑size PNGs from an ICO.

How to use it

Open a Windows ICO file.
Select a size layer and edit pixels with the toolbar tools.
Use invert when a dark mark vanishes on dark browser chrome.
Export an updated ICO or a ZIP of PNG layers (including dark variants when applicable).

Common problems and tips

ICO will not open. Confirm the file is a real Windows ICO (not a renamed PNG). Re‑export from Icon Converter if needed.
Undo history feels limited. History is capped in memory for performance. Download a copy before large experimental edits.
Black favicon vanishes on dark browser Chrome. Use Invert layer / Invert all layers, then export the ZIP which includes *-dark-* PNGs and adaptive HTML link tags.

Related tools

Favicon Generator — Generate favicons in every size, with light/dark auto-switch.
Icon Converter — Turn any image into a Windows ICO file.
Favicon Checker — Audit a site for missing favicon and touch icons.