Convert WebM to FLAC
Free online converter for WebM files. Lossless compression with roughly half the size of WAV. Nothing to install, no watermark, and every file is deleted automatically.
Drag and drop your files
or
Upload a WebM file to convert it to FLAC. Up to 3 files at once, 100 MB each.
Free · up to 3 files · 100 MB each · files deleted automatically after 1 hour.
About WEBM and FLAC
WebM .webm
An open container built for the web, holding VP8, VP9 or AV1 video with Vorbis or Opus audio. Royalty-free by design.
Good for
- Open and royalty-free
- Smaller than H.264 MP4 at similar quality
- Supports transparency, which MP4 does not
Trade-offs
- Weaker support in desktop editors and older devices
- Slower to encode than H.264
- Not the safe choice for sending a file to someone
video/webm
FLAC .flac
Lossless compression for audio. Roughly half the size of WAV, and it decodes back to the original samples exactly — nothing is approximated.
Good for
- Perfect reconstruction — identical to the source
- Around 50–60% of the size of WAV
- Full tagging, and an open royalty-free format
Trade-offs
- Still far larger than MP3 or AAC
- Not supported by every portable player or car stereo
audio/flac
WEBM and FLAC side by side
| WEBM | FLAC | |
|---|---|---|
| Compression | Lossy (VP9 or AV1) | Lossless |
| Transparency | Yes — with VP9 or AV1 | n/a |
| Typically used for | Web video, background loops with transparency | Archiving, high-fidelity libraries |
What changes when you convert WEBM to FLAC
Only the sound is kept
This takes the audio track out of the WEBM and writes it as FLAC. The picture is discarded entirely, and no conversion back will return it — keep the WEBM if you still need the video.
This is a re-encode, not a repackage
Some tools can move a stream into a different container untouched when the codecs happen to line up. We do not — every job here is decoded and encoded again, so the conversion takes time in proportion to the length of the file and costs a small amount of quality even where a repackage would have been possible. In exchange the output is predictable: it plays everywhere, rather than inheriting whatever the source happened to contain.
What your FLAC will contain
The output is FLAC — which is lossless, so there is no bitrate to set — the size is decided entirely by how compressible your audio turns out to be, usually landing near half of the equivalent WAV while preserving every sample exactly.
Other WebM conversions
Other ways to get FLAC
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