How to convert a .FLS file online
Three steps, all tab.
Open your file
Drop your .FLS file and every video, audio and subtitle track inside is listed with its codec, resolution, frame rate and language.
Preview
See frames from across your .FLS file before you convert, even when your browser can't play the codec inside.
Convert
Pick MP4, WEBM or MP3, or repack to MKV without re-encoding. Play the result right here, then download it.
What is a .FLS file?
Everything worth knowing about Adobe Flash Lite Sound Bundle.
A .fls file is most commonly an Adobe Flash Lite sound bundle, an internal audio resource from the Macromedia/Adobe Flash Lite toolchain, which reached end-of-life on December 31, 2020. There is no modern software that opens a standalone Flash Lite .fls file. The extension is also used by OziExplorer GPS track logs and ARM/Keil firmware images, so the right approach depends on which program created your file.
Programs that open .FLS files
- Windows
- Adobe Flash (Animate) — legacy, Hex editor (HxD)
- macOS
- Adobe Flash (Animate) — legacy
| Full name | Adobe Flash Lite Sound Bundle |
|---|---|
| Developer | Adobe Systems (originally Macromedia) |
| First released | Flash Lite era (Flash Lite 1.x–2.x, c. 2003–2008, for mobile devices) |
| Category | Audio & Video |
| MIME type | application/octet-stream |
Related viewers
Other free tools to open and preview your files.
Is my .FLS file uploaded to a server?
No. Your .FLS file is converted for you. The converted file is created in memory,.
Why is conversion slower than desktop software?
Browsers give web pages a single CPU core for this kind of work and no hardware video encoder. Short clips convert in seconds; for long 4K films a desktop app like HandBrake is faster. Use Start and Length to convert just the part you need.
Which output format should I pick?
MP4 plays on every phone, TV and browser. WEBM is an open format that's great for the web. MP3 keeps only the sound. MKV (no re-encode) is instant and lossless, but only changes the container.
Can I keep all audio tracks and subtitles?
The MKV (no re-encode) option copies every track as-is. MP4 and WEBM keep the first video and audio track, which is what most players use.
Why can't some files be converted?
Files protected with DRM (for example purchased iTunes .m4p songs or some .wmv rentals) are encrypted. We can show what's inside, but nobody can convert them without the key.
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