ICO to GIF Converter

Converting ICO to GIF: What This Tutorial Covers

ICO is Microsoft's icon container: a directory of small bitmaps in one file, with each entry's width and height stored in a single byte — which is exactly why 256x256 is the ceiling. GIF is the 1980s palette format that everything still reads, capped at 256 colours per frame with one palette slot reserved for full transparency. The two formats are close cousins in scale, so this is one of the few icon conversions that loses almost nothing. This tutorial covers which controls on this page actually affect a single still icon, which do nothing, and the one quirk that catches people out with multi-size icon files.

How to Convert ICO to GIF

1. Upload Your ICO File: Drag and drop your .ico onto the page or click "+ Add Files" to browse. Several icons can be queued at once.
2. Set the Colors Control: Switch "File Compression" to "Custom". "Colors" — revealed there — is where a still icon's output is decided — choose "By Color Reduction + Dither" and a palette size from 256 down to 2 to shrink the file, or leave it alone and the converter writes up to the full 256 colours GIF allows.
3. Set Image Resolution and Combine Behaviour (Optional): "Image resolution" (also under "File Compression" → "Custom") starts on "Keep original", with a percentage slider, preset sizes down to 16P, and exact Width x Height controls. "Combine?" only matters with more than one file: "Single animation" (the default) merges the icons into one animated GIF at the "Video Framerate" you pick, while "Individual files" gives you one GIF per icon.
4. Convert and Download: Click "Convert" and download the .gif. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.

Which Controls Do What on This Page

A single icon converts through an ImageMagick palette pass, so several controls that exist for other GIF jobs are inert here. This table is the honest map:

ICO and GIF Compared

Common Errors and How to Fix Them

• "The GIF flickers, or has more than one frame." Your .ico stores more than one size. Each stored bitmap becomes a frame of the GIF, and the canvas is set from the first entry, so larger frames get clipped. Re-save the icon with a single size — or convert the source artwork instead — to get a clean one-frame GIF.
• "The output is only 16x16." Same root cause: the file's first entry sets the canvas, and icon editors commonly write the smallest size first. Export the size you want on its own before converting.
• "The icon's edges look jagged or have a halo." GIF transparency is binary. Semi-transparent anti-aliased pixels in the source have to become either fully opaque or fully transparent, so soft edges harden. If you need smooth edges over any background, use ICO to PNG instead — PNG keeps the 8-bit alpha channel.
• "Colours look banded or speckled." You reduced the palette too far. Move "Colors" back up towards 256; the dithering that hides banding also introduces the speckle, and both effects get worse as the palette shrinks.
• "The Image quality slider did nothing." Expected — see the control table above. Adjust "Colors" instead.

When This Doesn't Work

GIF is a good match for icon-scale artwork, but it is not always the right target. If the icon has soft anti-aliased edges or a drop shadow that must sit over an arbitrary background, GIF's single transparent colour will show its seams — ICO to PNG is the correct answer there, and ICO to WebP is the smaller modern option with full alpha. If you are trying to build a favicon rather than read one, go the other way with PNG to ICO. And if what you actually want is an animation built from several icons, upload them all at once and leave "Combine?" on "Single animation" rather than converting them one at a time.

Frequently Asked Questions

Does the icon's transparency survive the conversion to GIF?

Partly. GIF reserves a single palette index for transparency, so pixels are either fully see-through or fully painted. Fully transparent areas of the icon come through as transparent, but semi-transparent pixels — the anti-aliased ring around most modern icon artwork — are forced to one extreme or the other, which is what produces hard, slightly jagged edges. For a faithful alpha channel, convert to PNG or WebP.

Why does my GIF have several frames when I only uploaded one icon?

Because an .ico is a container, not a single picture. If it stores 16x16, 32x32, 48x48, and 256x256 versions, each of those becomes a frame in the GIF, and the GIF's canvas is taken from the first entry so the bigger frames end up clipped. Saving the icon with only one size, or converting the original artwork, produces a normal single-frame GIF.

Which control changes the file size?

"Colors" (under "File Compression" → "Custom"). A GIF's size is driven almost entirely by its palette and pixel count, so cutting the palette from 256 to 64 or 32 shrinks flat icon artwork noticeably, and resizing under "Image resolution" cuts it further. The "Image quality (%)" slider on this page has no effect on a single still icon — GIF has no lossy quality parameter of the kind JPEG uses.

Does the Dither checkbox do anything here?

Not on a single still icon. When the palette is reduced, Floyd-Steinberg dithering is applied by the converter regardless of that switch. On flat icon artwork dithering rarely matters anyway; on icons with gradients it is what stops the gradient from banding into visible steps.

How do I turn several icons into an animated GIF?

Upload all of them in one go and leave "Combine?" on "Single animation", then set "Video Framerate" — 10 FPS is the default, with everything from 1 FPS (slideshow) to 50 FPS available. Each icon becomes a frame in upload order. Choosing "Individual files" instead gives you one separate GIF per icon.

Will the GIF be smaller than the original ICO?

Usually, and often by a lot. Icon files carry a directory, per-entry headers, an AND mask, and frequently several copies of the same artwork at different sizes, while the GIF holds a single palette-indexed image with LZW compression. A single-size icon converted to a 256-colour GIF is normally a fraction of the original file.

Can I convert a GIF back into an icon?

Not from this page — this direction is icon to image. To build an icon, start from a square image at the size you need: PNG to ICO is the usual route, since PNG preserves the alpha channel that icon entries expect. Icon output is capped at 256x256, the maximum an icon directory entry can describe.

How are my uploaded icons handled?

Files are uploaded over an encrypted connection, decoded and re-encoded on our servers, and deleted automatically a few hours later. No sign-up, no watermark, and files are never shared or made public. Icons are tiny, so this conversion is limited by nothing more than upload time.