ICO to FLV Converter

ICO to FLV Converter

ICO is Microsoft's Windows icon format — a small still image. FLV (Flash Video) is a video container from the Flash era, the format YouTube, Hulu, and Vimeo once used to deliver clips before HTML5 video replaced it. This is an unusual and legacy pairing: it wraps a single Windows icon in a dead-format video. The result is a silent clip that holds that one icon on screen for a set duration, with no motion and no sound, because the source is a static image. It is a genuinely narrow conversion — most people who upload an icon want a flat image (see ICO to PNG), and anyone who needs a still-as-video that actually plays today is better served by ICO to MP4 than by Flash-era FLV.

ICO Format at a Glance

FLV Format at a Glance

How to Convert ICO to FLV

1. Upload Your ICO File: Drag and drop your .ico onto the page or click "+ Add Files" to browse. You can queue several icons and convert them with the same settings using the Merge strategy control (one video per icon, or merge them).
2. Set the Image Duration: Use the Image Duration control to choose how long the icon is held on screen (the default is 5 seconds per frame). With a single still image, this is the full length of the finished FLV.
3. Choose a Resolution and Background Color: Under Video Resolution, keep the original icon size or pick a Fixed or Preset resolution to scale it up; set the Background Color (default Black) to fill any area around a non-matching aspect ratio.
4. Convert and Download: Click "Convert" and download the FLV. No sign-up, no watermark.

What to Expect from the Output

Three things are true of every ICO-to-FLV result:

• It is silent. An FLV normally pairs Flash video with an MP3 or AAC audio track, but an icon has no audio track, so no audio codec is written and the file is silent by design — that is correct, not a fault.
• It does not move. A standard ICO is a static icon, so the FLV is one fixed frame held for the duration you set. A longer Image Duration holds the same image on screen for longer; it never adds motion.
• It cannot gain detail. A single image inside an ICO is at most 256×256 pixels, and often just 16×16, 32×32, or 48×48. Scaling that up to a 720p or 1080p video frame produces a soft or blocky picture — a 32×32 icon stretched to 1080p is enlarged roughly 60×, and no upscaling can invent detail that was never there. For the sharpest result, start from an ICO that contains a 256×256 image and keep Video Resolution close to that size.

The codec is handled for you: the video defaults to FLV1 (Sorenson Spark), the codec the Flash Video container was built around. Most modern players read FLV through ffmpeg or VLC, but browsers no longer play it at all.

Frequently Asked Questions

Why does my ICO-to-FLV file have no audio?

Because the source is an icon, which has no sound. An FLV container normally carries Flash video alongside an MP3 or AAC audio track, but with an image input there is nothing to encode into audio, so no audio codec is written and the output is silent video. This is expected for any image-to-video conversion, not a defect.

Does the FLV actually move, or is it a still image?

It is a still image held for the duration you set. A standard ICO is a static icon with no animation, so the output is one fixed frame shown for several seconds, not a moving clip. In our testing, a 256×256 icon set to a 5-second hold produced a silent FLV of a single, unchanging frame. If you need motion, you must start from frames or an animated source instead, for example with PNG to MP4.

What video codec does the FLV output use?

FLV1 — the Sorenson Spark codec, a proprietary variant of the H.263 standard and the codec the Flash Video container was originally built around. FLV containers can also hold On2 VP6 (from Flash Player 8) or H.264 (from Flash Player 9), but the default here is the classic Sorenson Spark stream that any FLV-aware player expects. There is no audio stream, because the source icon has no sound.

Should I really convert my icon to FLV, or to MP4 instead?

For almost every use, MP4 is the right choice. FLV is a Flash-era format: Adobe Flash Player reached end of life on 31 December 2020 and stopped running Flash content on 12 January 2021, so no browser plays FLV today. It still opens in VLC and ffmpeg, but the only honest reason to target FLV now is feeding an un-migrated Flash-era pipeline that specifically expects a .flv — for example a placeholder or splash clip built from a logo. If you want a clip that plays everywhere, use ICO to MP4 instead.

Why is my ICO-to-FLV video so small or low resolution?

Because an ICO holds small images — at most 256×256 pixels, and often just 16×16 or 32×32. The FLV inherits that size unless you upscale it under Video Resolution, and stretching a tiny icon to 720p or 1080p will look soft. For the sharpest result, use an ICO that contains a 256×256 image and avoid scaling far beyond it.

My ICO has several sizes — which one becomes the video?

An ICO is a container that can store several sizes and color depths in one file (commonly 16, 32, 48, and 256 pixels) — that multi-size storage is why browsers auto-request /favicon.ico from a site root. The converter builds a single video frame from the icon rather than cycling through every stored size, so the result is one held image, typically taken from the largest image the file contains.

I just want the icon as a normal image, not a video — what should I use?

Then FLV is the wrong target. A video format wraps a single icon in a clip you cannot easily edit as a picture, in a container that browsers no longer play. Convert to a flat raster image instead with ICO to PNG, which keeps the icon's transparency. FLV only makes sense when an old Flash-era system specifically needs a .flv file.

How are my files handled, and how long are they kept?

Your ICO is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after the conversion — no sign-up, no watermark, never shared or made public.