ICO to GIF Converter
You have an icon file and a forum, chat tool or old web page that wants a GIF. This page reads the ICO in your browser and writes one still GIF frame, keeping fully transparent pixels. Colours are reduced to a 256-colour palette, which suits simple icon artwork well.
Embed this tool on your websiteShow code
Free to use on any site. Paste the code where you want the tool to appear. It runs inside the page; visitors' files are processed in their own browser and are not uploaded.
WordPress and most site builders have a "Custom HTML" block where this code can be pasted. The embed keeps a small link back to CalcMaster.
How to convert ICO to GIF
- Add your ICO files by dropping them, clicking the drop zone or pasting.
- The output format is already set to GIF. Adjust quality or size if you need to.
- Press Convert and compare the original and new size for each file.
- Download each file or all of them as a ZIP.
When to convert, and when not to
- A legacy site or tool accepts GIF but rejects the ICO.
- The icon is flat artwork with few colours, which GIF handles comfortably.
- You need a still picture and a single transparent colour is enough.
- Do not expect an animation; this tool never creates one.
What changes
- The image from the ICO that your browser shows, usually the largest or default, is converted. Other embedded sizes may not be offered.
- The GIF palette uses up to 255 colours plus one transparent colour.
- Pixels that are mostly transparent become fully transparent. Partly see-through edges are not blended, so curves can look slightly stepped.
- Smooth gradients inside a polished icon may show banding after colour reduction.
- There is no quality slider, and metadata is not copied.
Icons are a good match for GIF
Icons usually use flat colours, bold outlines and few gradients. Those qualities are exactly what GIF was built for. With a limited number of distinct colours, the palette can represent the icon faithfully, and the single transparent colour covers the background.
Glossy icons with soft shadows are the exception. Shadows rely on partial transparency, and GIF cannot store it, so they turn into hard edges.
How transparency is handled
GIF transparency is on or off for each pixel. When the converter reads your icon, any pixel that is less than half opaque is made fully transparent, and the rest become solid. That keeps shapes clean on plain backgrounds, but if you place the GIF on a coloured page, you may see a thin light or dark fringe on curved edges.
If the fringe bothers you, consider PNG instead, which handles partial transparency perfectly.
Size and scaling
An icon is small, so the GIF is small too. Use the Resize setting if you need it larger, remembering that scaling raises the pixel count without adding detail. Compare the sizes shown in the queue to see what the conversion does for your own icon.
Icons from older software are often already close to GIF in spirit: flat colours, hard edges and a single transparent background. That is why this pair tends to behave well. Convert one icon first and zoom in on the edges, because that is where the lack of partial transparency shows up.
When the destination also accepts PNG, compare the two results. PNG keeps smooth edges and every colour, while GIF is mainly worth choosing when the destination leaves you no other option.
Privacy: your files stay on your device
- The tool decodes, resizes and encodes your pictures with your browser. The files are never sent to a server.
- To check it yourself: open the browser developer tools (F12), open the Network tab, convert a file, and look for any request that carries your image. You will see none.
Frequently asked questions
Is the GIF animated?
No. You get a single still frame.
Why do the edges look rough?
GIF has no partial transparency, so smooth anti-aliased edges become stepped.
Will all my colours survive?
Flat icons usually do. Gradients may show banding because GIF is limited to a 256-colour palette.
Which icon size is converted?
The one your browser shows from the ICO, normally the largest or default entry.
Do you upload my icon?
No. Everything runs locally in your browser.