ICO to AVI Converter

Converting ICO to AVI: What This Tutorial Covers

ICO is the Windows icon container — one file holding several small bitmaps, capped at 256x256 pixels by Microsoft's Vista-era icon guidance, so the shell can pick a size per context. AVI is Microsoft's Audio Video Interleave container, the RIFF-based format that shipped with Video for Windows in 1992 and stayed the Windows default for a decade. Turning an icon into an AVI produces one motionless frame held for a set time, with no audio. This tutorial covers the controls that actually change the file, the codec AVI defaults to here, and the cases where a different target is the right answer.

How to Convert ICO to AVI

1. Upload Your ICO File: Drag and drop your .ico onto the page or click "+ Add Files" to browse. Several icons can be queued and converted with the same settings.
2. Set Image Duration and Merge Strategy: Open Advanced Options. "Image Duration" controls how long the icon is held (5 seconds per frame by default, selectable from 1/60s up to 10 seconds), and "Merge strategy" chooses between "Merge images" (one AVI containing every icon in order) and "Video per image" (a separate AVI per icon).
3. Choose Background Color, Resolution, and Codec: "Background Color" (White by default) fills the icon's transparent pixels and any padding; "Video resolution" starts at "Keep original", which encodes at the icon's own size; and "Video Codec" defaults to MPEG-4, with Xvid, DivX, MJPEG, H.264, MPEG-1, MPEG-2, HuffYUV, WMV, and others available.
4. Convert and Download: Click "Convert" and download your AVI. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.

What the Converter Actually Produces

Walk-through: The Codec and Quality Choices

AVI is only a wrapper — what matters is which codec goes inside it, and that is exactly why AVI is still requested. The default here is MPEG-4 Part 2, the codec that classic Windows software and DivX/Xvid-era hardware decode without complaint.

• If a set-top box or old editor named a codec, pick it from "Video Codec" directly. Xvid and DivX are both MPEG-4 Part 2 variants; MJPEG stores every frame as an independent JPEG, which some capture and editing tools prefer; HuffYUV is mathematically lossless and enormous.
• If you want maximum compatibility inside AVI, leave MPEG-4 selected. Choosing H.264 works and produces a smaller file, but H.264-in-AVI is an unofficial pairing that some legacy players refuse.
• If you want to set quality by hand, switch "File Compression" from Quality Preset to Constant Quality. With MPEG-4 selected the slider is a 1-31 quantiser scale (lower is better, 5 is the starting value), not the 16-51 CRF scale H.264 uses — the two numbers are not interchangeable.
• If the frame size looks a few pixels off, that is the codec: MPEG-4 requires dimensions divisible by 4, so a non-standard icon size such as 22x22 is trimmed to 20x20. Every conventional icon size — 16, 24, 32, 48, 64, 128, 256 — divides cleanly and is untouched.

Common Errors and How to Fix Them

• "The video is tiny." With "Video resolution" on "Keep original", the clip is exactly as large as the icon — often 32x32 or 48x48. Pick a resolution preset if you need a bigger frame, understanding that it is an upscale, not extra detail.
• "The clip came out smaller than the icon I made." A multi-size .ico is a directory of bitmaps and the converter reads the first entry, which is not necessarily the largest — many icon editors write the smallest first. Re-save the icon containing only the size you want.
• "There is a wide coloured border around the icon." A square icon inside a non-square frame gets padded rather than stretched, and the padding uses the Background Color. Set that colour to match where the clip will be used, or choose a square output size.
• "It won't play in a browser or on my phone." AVI has no native HTML5 support and mobile players rarely handle it. That is the container's limitation, not the conversion — use ICO to MP4 if the destination is a browser, phone, or social platform.
• "The AVI is silent." Expected. There is no audio to carry over from a still image, so no audio track is created.

When This Doesn't Work

AVI is the wrong target for most people who land here. If you only need a usable picture of the icon, ICO to PNG keeps transparency and every pixel, and ICO to JPG flattens it onto a solid background for tools that insist on JPEG. If you need a clip, ICO to MP4 is smaller and plays essentially everywhere. Choose AVI only when something downstream names it: a pre-2012 non-linear editor, a DivX-certified player, a Windows-only capture or authoring tool that lists AVI as its accepted input. And if you have AVI footage you cannot play rather than an icon, run it through AVI to MP4 instead.

Frequently Asked Questions

Which codec does the AVI output use by default?

MPEG-4 Part 2. AVI is a container that can hold dozens of codecs, and this page pre-selects the one with the widest legacy support — the same family as DivX and Xvid. The full "Video Codec" list also includes H.264, H.265, MPEG-1, MPEG-2, MJPEG, MS MPEG-4, WMV 1 and 2, HuffYUV, Theora, VP8, VP9, and AV1, so you can match whatever a specific player expects.

My ICO holds several sizes — which one ends up in the video?

The first image stored in the file. An .ico is a directory of bitmaps and the decoder takes entry zero rather than searching for the biggest one, so a favicon that bundles 16x16 through 256x256 may well convert at 16x16 if that entry was written first. Export the size you actually want as a standalone image and convert that if the result looks too small.

Does the AVI have any motion or sound?

Neither. The conversion holds one icon on screen for the duration you set — no pan, no zoom, no transition, and no audio track, because a still image supplies none. If you upload several icons with "Merge images" selected, they play back to back as static frames with no crossfades between them.

How long can the clip be, and how is length set?

"Image Duration" runs from 1/60s (a single frame at 60 fps) up to 10 seconds per image, with 5 seconds selected by default. The encode itself runs at 1 fps with B-frames disabled, so a 5-second clip is five identical frames. For a longer hold, either raise the duration or merge several copies of the icon.

Why does the Constant Quality slider go to 31 instead of 51?

Because MPEG-4 Part 2 uses a quantiser scale, not H.264's CRF scale. On this page the slider is labelled CRF but spans 1-31 with a starting value of 5, where lower means better quality. Switch "Video Codec" to H.264 and the same control changes to the familiar 0-51 range starting at 23. Copying a number across the two scales gives wildly different results.

Will the icon's transparency be kept?

No. No video container stores an alpha channel, so transparent and semi-transparent pixels are composited onto the Background Color — white unless you change it — before the frame is encoded. Anti-aliased icon edges blend into that colour, which is why matching it to the destination background matters. To keep transparency, convert to an image instead with ICO to PNG.

Why would I choose AVI over MP4 for an icon?

Usually you wouldn't. AVI earns its place when a legacy Windows tool, a DivX-certified set-top box, or an older editing suite explicitly lists it as an accepted format, or when you need an odd codec such as HuffYUV or MJPEG that AVI carries comfortably. For anything with a browser, a phone, or a modern editor at the other end, MP4 is smaller and plays without argument.

How are my uploaded files handled?

Your .ico is 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. Because a motionless MPEG-4 frame compresses heavily, the resulting AVI is normally very small — the practical limit on this conversion is upload time, not file size.