Convert WebM to FLAC Online Free
Drag & drop your .webm file here, or click to browse
Converts to FLAC on secure servers · first daily conversion free · no signup
Your first conversion each day is free. A $2.99 one-time Day Pass unlocks 24 hours and ends by itself.
Extract the audio from your WebM video and save it as lossless FLAC. Perfect for preserving the full quality of browser-recorded video, YouTube downloads, or web conference recordings.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile extracts the audio track from your WebM video and encodes it as lossless FLAC using FFmpeg on our secure servers. FLAC preserves every detail of the source audio with zero further quality loss. Files are auto-deleted after conversion, free with no signup required.
WebM vs FLAC: Format Comparison
Key differences between the two formats
| Feature | WebM | FLAC |
|---|---|---|
| Type | Open web video container | Lossless audio-only format |
| Developer | Google / WebM Project | Xiph.Org Foundation |
| Audio codec | Vorbis or Opus | FLAC lossless codec |
| License | Open-source, royalty-free | Open-source, royalty-free |
| File size | Moderate (includes video) | Moderate — lossless audio only |
| Quality | Good — lossy Vorbis/Opus audio | Bit-perfect audio reproduction |
| Use case | Web video streaming (HTML5) | Audiophile archiving, lossless music libraries |
| Compatibility | Chrome, Firefox, web browsers | Desktop media players, Plex, Kodi |
When to Convert
Common scenarios where this conversion is useful
Archive audio from browser-recorded WebM files
MediaRecorder API in browsers often produces WebM video files. When you record a screen session, video call, or audio session in the browser, converting the WebM to FLAC creates a lossless audio archive of the session.
Extract lossless audio from downloaded web video
WebM is a common format for downloaded web video content. Converting the audio track to FLAC gives you a lossless version suitable for audiophile listening, further editing, or permanent archiving.
Prepare audio stems from video production exports
Video editors sometimes export WebM intermediates. Extract audio stems as FLAC to preserve full quality for audio post-production work in any DAW without generation loss.
Create lossless podcasts from video conference WebM files
Online meetings and webinars recorded in WebM format can have their audio extracted to FLAC for podcast production. Editing from a lossless source avoids quality degradation before the final MP3 export.
Build a lossless audio library from web content
If you collect audio content that arrives in WebM format, converting to FLAC lets you organize it in a lossless music manager like Plex or Kodi with proper metadata and cover art.
Who Uses This Conversion
Tailored guidance for different workflows
Podcasters
- Pull the audio from a recorded WebM interview or webinar and publish it as a FLAC episode
- Convert a WebM livestream recording to FLAC so listeners can catch up on the go
Musicians & Producers
- Extract a performance take from a WebM video into FLAC to edit in your DAW
- Rip reference audio from a WebM clip to FLAC for sampling or transcription
Content Creators
- Convert a WebM recording to FLAC to reuse the soundtrack as background audio or a voiceover
- Turn a WebM talk into a FLAC audiogram or clip for social platforms
How to Convert WebM to FLAC
-
1
Upload your WebM file
Drag and drop your .webm file onto the converter or click to browse. The free tier accepts files up to 25MB; eligible paid browser access accepts up to 100MB.
-
2
Server-side FLAC extraction
Your WebM is uploaded over HTTPS and FFmpeg extracts and decodes the audio track (Vorbis or Opus), re-encoding it as lossless FLAC. The video stream is discarded.
-
3
Download your FLAC file
Click Download to save the .flac file. The original WebM and converted FLAC are automatically deleted from our servers after you download.
Developers: convert via API →
Frequently Asked Questions
WebM supports two audio codecs: Vorbis (the older standard) and Opus (the modern, high-efficiency codec). FFmpeg detects which codec is in your WebM and decodes it appropriately before encoding to FLAC.
FLAC itself is lossless — it stores audio with no further quality loss. However, WebM typically uses Vorbis or Opus, both of which are lossy codecs. Converting lossy WebM audio to FLAC creates a lossless container for audio that has already undergone some quality reduction.
FLAC avoids adding another layer of lossy compression. If you plan to edit the audio further (trim, mix, process) before exporting to a final lossy format, starting with FLAC preserves maximum quality throughout the editing process.
FLAC is lossless but compressed. The output size depends on the audio duration and content complexity. Audio-only FLAC is much smaller than the source WebM if the WebM had a high-quality video stream, but larger than MP3 or Opus alternatives.
FLAC is supported by VLC, Foobar2000, Kodi, Plex, Winamp, and natively on Android and Linux. iOS and macOS have supported FLAC since iOS 11 and macOS 10.13 respectively.
Yes. FFmpeg decodes Opus audio from WebM and re-encodes it as lossless FLAC. The output quality reflects what was in the Opus stream — which is already very good at typical streaming bitrates.
Yes. ChangeThisFile is completely free with no signup required, no watermarks on output, and no limits on how many conversions you run.
Audio extraction from WebM to FLAC is typically fast — under 30 seconds for most video lengths. FFmpeg only needs to decode the audio stream, which is much faster than processing video.
FLAC uses Vorbis comment tags. Metadata present in the WebM container (title, artist, etc.) may be transferred to the FLAC tags. You can view and edit FLAC metadata with tools like MusicBrainz Picard or Kid3.
Yes. All uploads are encrypted via HTTPS. Files are automatically deleted from our servers immediately after conversion. We do not retain, access, or analyze your files.
Related Conversions
Related Tools
Free tools to edit, optimize, and manage your files.
Need to convert programmatically?
Use the ChangeThisFile API to convert WebM to FLAC in your app or script. Free tier included.
Ready to convert your file?
Convert WebM to FLAC instantly — free, no signup required.
Start Converting