Add your APNG file
Drop one or more .apng files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
APNG to FLV
Converting a .apng image to .flv re-encodes the pixels for a different balance of size, quality, and support. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop APNG files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting Animated PNG to Flash video
Converting a .apng image to .flv re-encodes the pixels for a different balance of size, quality, and support. An .apng file is an animated extension of PNG: full 24-bit color with 8-bit alpha per frame, in a stream that plain PNG decoders read as a normal still image. It delivers the smooth, semi-transparent animation that GIF's 256-color palette never could, and it is the format behind many messaging-app sticker packs.
An .flv file is a Flash Video container, the format that powered most web video during the 2000s. YouTube, news sites, and early streaming platforms delivered .flv streams into the Flash Player plugin before HTML5 video replaced the whole stack. For this route the practical draw is very small container overhead and h.264/AAC content re-wraps to MP4 without any re-encoding — balanced against no mainstream player ships FLV support anymore, which is worth knowing before you commit a large batch.
Why convert APNG to FLV?
The practical trigger for this conversion is usually a mismatch: with .apng, files grow quickly for long or high-motion animations, where animated WebP/AVIF or video compress far better. Switching to .flv buys you very small container overhead, which is why it is the better fit for recovering clips downloaded during the Flash era. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
APNG vs FLV at a glance
| Aspect | Animated PNG (.apng) | Flash video (.flv) |
|---|---|---|
| Format type | Lossless — every pixel or sample is preserved exactly | Container — quality depends on the codecs and settings inside |
| How it stores data | adds three chunk types to PNG: acTL (animation control), fcTL (frame control), and fdAT (frame data) | a simple sequence of tagged audio, video, and script packets designed for progressive download and RTMP streaming |
| Strongest at | animated stickers (Apple's iMessage and LINE both build on APNG) | recovering clips downloaded during the Flash era |
| Weak spot | files grow quickly for long or high-motion animations, where animated WebP/AVIF or video compress far better | no mainstream player ships FLV support anymore |
Pick FLV as the output
Select .flv in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if FLV is selectable, the route is real and validated.
Convert on your device
Press Convert. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid FLV file. Outputs keep the original filename with the .flv extension.
APNG to FLV questions, answered
Will converting APNG to FLV lose quality?
Since apng is lossless-oriented and flv is container-oriented, the conversion preserves the source content exactly as stored; no additional compression pass is applied beyond what .flv itself requires.
Is it private to convert APNG files here?
Yes — the .apng file is processed inside your browser tab and never uploaded. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders. Close the tab and the file is gone from memory.
Where will the FLV file work?
No current browser can play .flv, since the plugin that decoded it was removed from Chrome, Firefox, and Edge at the end of 2020. VLC and ffmpeg-based tools still read the format reliably, which is how old files get rescued into MP4.
Will the FLV file be bigger or smaller than my APNG?
It depends on the content: a simple sequence of tagged audio, video, and script packets designed for progressive download and RTMP streaming. Convert one representative file first and compare before batch-processing a large set.