AVIF to FLV Converter

AVIF to FLV Converter

This tool turns an AVIF still image into an FLV (Flash Video) clip: your single image is held motionless on screen for a duration you choose, with no motion and no audio. AVIF is the AV1 Image File Format, a modern still format built on the AV1 video codec; FLV is Adobe's Flash-era video container. Before you convert, know that FLV is a dead-end target — Adobe ended Flash Player support on December 31, 2020, and no current browser plays Flash video. If you just want a shareable video of a picture, convert AVIF to MP4 instead; pick FLV only when a specific legacy Flash-era system or encoder still ingests .flv files.

Is FLV Still Worth Using?

For almost everyone, no. FLV was created by Macromedia (later Adobe) in 2003 to deliver video through the Flash Player plugin, and for years it was how sites streamed clips before HTML5 <video> existed. That era is over: Adobe stopped supporting Flash Player on December 31, 2020 and began blocking Flash content from running on January 12, 2021, so FLV will not play in Chrome, Firefox, Edge, or Safari. Desktop players such as VLC can still open an FLV because they decode the underlying video stream directly, but on the open web and on phones the format is effectively retired. The only honest reason to target FLV today is to feed a legacy ingestion pipeline — an old media server, archive, or encoder — that still specifically expects the .flv extension. For anything you plan to share, embed, or upload, use MP4.

AVIF Format at a Glance

FLV Format at a Glance

How to Convert AVIF to FLV

1. Upload Your AVIF File: Drag and drop your image onto the page or click "+ Add Files." You can add several AVIF images at once.
2. Set the Duration: Use the Duration control to choose how long the still plays; the default is 5 seconds per frame, and presets range from a fraction of a second up to 10 seconds per frame.
3. Choose Background, Quality, and Resolution (Optional): Pick a Background Color (default Black) for any padding around a non-matching aspect ratio, set the Quality Preset to Very High for a sharp frame, and pick a Video resolution preset or keep the original.
4. Convert and Download: Click "Convert" and download your FLV. No sign-up, no watermark.

Frequently Asked Questions

Why won't my FLV file play in a web browser?

Because FLV is a Flash format and Flash is gone. Adobe ended Flash Player support on December 31, 2020 and blocked Flash content on January 12, 2021, so Chrome, Firefox, Edge, and Safari will not play FLV natively. To view the clip, open it in a desktop player like VLC that decodes the video stream directly, or convert it to MP4 for normal browser and phone playback.

Does the FLV clip have any sound or motion?

No. This is an image-to-video conversion, so a single AVIF is shown as one motionless frame for the duration you set, with no audio track. There is nothing to animate and no soundtrack — the output is a silent video stream inside an FLV container. If you upload several images and pick "Merge images," you get a slideshow that cuts between stills, but each frame is still motionless.

Should I convert AVIF to FLV or to MP4?

Use MP4 in nearly every case. FLV and MP4 are both video containers, but MP4 carries modern codecs (H.264, H.265) and plays everywhere — browsers, phones, social platforms, and editors — while FLV is tied to the discontinued Flash ecosystem and supports only older codecs. Choose FLV only when a legacy Flash-era system or encoder specifically requires that extension. For everything else, convert AVIF to MP4.

How long can the still image play in the FLV?

The Duration control sets how many seconds the image stays on screen, with presets from a fraction of a second up to 10 seconds per frame (the default is 5). In our testing, a single AVIF held for 5 seconds at Very High quality produces a short silent FLV of a few hundred kilobytes, since one repeated frame compresses very efficiently.

Will the FLV keep AVIF's transparency or HDR?

No. AVIF supports a full alpha channel and HDR, but FLV is an opaque video format with no transparency, so any transparent regions are flattened onto the Background Color and the wide color range is mapped down to standard video. If preserving transparency matters, keep the image as a still and convert AVIF to PNG instead — PNG keeps the alpha channel.

Why convert an AVIF at all instead of using it directly?

AVIF is a still image and many older tools — especially Flash-era media servers and encoders — only accept video input. Wrapping the picture in a video container is a way to feed it into a pipeline that expects a clip rather than a photo. If you only need a portable image instead of a video, convert AVIF to JPG for the widest compatibility.

Is my file uploaded to a server, and how long is it kept?

Yes. Your AVIF is uploaded over an encrypted connection, converted on our servers, and the files are deleted automatically a few hours after conversion. No account is required, and there is no watermark, file-count limit, or hidden Pro tier on this converter.