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WEBM to FLAC converter

Convert WEBM to FLAC in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.

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Other ways to convert WEBM

Convert other formats to FLAC

Read more about the WEBM format and the FLAC format, or see every video tool and all video conversions.

Should you convert WEBM to FLAC?

Yes, when you only need the sound: a song from a music video, the audio of a lecture, or a voice recording to transcribe. The picture is left out and the soundtrack is saved as FLAC.

WEBM is the web’s open video format, holding VP8, VP9 or AV1 video with Opus or Vorbis audio; FLAC is lossless audio at roughly half the size of WAV. Use FLAC to archive music and recordings you may want to convert again later.

WEBM and FLAC compared
Property WEBM FLAC
What it is The web’s open video format, holding VP8, VP9 or AV1 video with Opus or Vorbis audio Lossless audio at roughly half the size of WAV
Audio inside VP9 or AV1 video with Opus audio lossless, 16 or 24-bit
Plays on Chrome, Firefox, Edge and recent Safari, but not the iPhone Photos app, many editors or social uploads Most modern players, Android and recent iPhones; some car stereos and older apps don’t
Best for Video embedded in web pages, and browser screen recordings Archiving music and recordings without losing anything

How to convert WEBM to FLAC

  1. 01

    Add your WEBM

    Drop your WEBM video onto the box, or click to choose it. It is read from your disk and stays there.

  2. 02

    Check the settings

    The output is already set to FLAC. Change the bitrate if you want to; the defaults suit most files.

  3. 03

    Save the FLAC

    Press convert and save the FLAC. Several files come back together as a ZIP.

What changes when WEBM becomes FLAC

FLAC is lossless, the soundtrack usually isn’t

The audio inside a WEBM is almost always compressed already, usually as Opus. FLAC preserves it exactly but makes a much larger file without sounding better. Choose it for editing software; choose MP3 or M4A for listening.

Video files without sound

Screen recordings and some exported clips have no audio track at all. The file is checked as soon as you add it, and you’ll be told before converting if there’s nothing to extract.

This page is put together from our notes on each format, choosing only what is true of WEBM and FLAC, so every pairing states the same facts the same way. How these pages are made.

Why it doesn’t upload

Uploading a whole video to keep only its sound wastes time and data, and hands over the footage too. The audio track is read and saved right here, and the file never leaves your device.

How to check for yourself

Worth knowing

  • About the WEBM. Browser screen recorders save WEBM, and the recording then fails to upload or attach almost everywhere else.
  • About the FLAC. FLAC made from an MP3 is lossless only in name: it perfectly preserves an already lossy recording, at five times the size.
  • AVI, WMV, FLV and other older formats use the FFmpeg engine, a one-time 31 MB download.

Questions

Does extracting FLAC from a WEBM lose quality?

No. FLAC stores the soundtrack exactly as decoded, although it can’t improve on the compression already in the video.

Can I get the audio from only part of the video?

Yes. Set a start and end time before converting, and only that section is saved as FLAC.

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