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convertexa

WebM → FLAC

WebM to FLAC converter

convertexa converts WebM files to FLAC locally in your browser using a dedicated ffmpeg engine. Nothing is uploaded: the file is read, converted and handed straight back to you as a download.

  • Free, no sign-up
  • Nothing is uploaded
  • Works offline
Quality
Lossless
Runs
In your browser
Max input
300 MB
Status
stable

Drop a file to convert

Everything happens on your device — nothing is uploaded.

or paste with Ctrl+V

How to convert WebM to FLAC

  1. 1 Drop your WebM file here.
  2. 2 Choose FLAC as the output format and adjust the options.
  3. 3 Convert and download the result.

About WebM and FLAC

WebM uses VP8/VP9 and Opus, and is natively supported by browsers.

FLAC is lossless compression: smaller than WAV with identical audio.

WebM files are read by the convertexa engine that ships with this page, so the conversion is identical whether you use this tool or the general converter. The output is produced with the same codec settings for every visitor, which means the same input always produces the same result.

Limitations

  • Only the first audio stream is used.

Frequently asked questions

How do I convert a WebM file to FLAC?

Add your WebM file to the box above. convertexa detects the format from the file content, applies the WebM to FLAC conversion and gives you the result to download. The whole operation runs inside your browser.

Are my WebM files uploaded anywhere?

No. The conversion runs in a sandboxed worker on your own device. Your file never leaves the browser, and nothing is stored on a server.

Is the WebM to FLAC conversion lossless?

Yes. This conversion preserves all of the source data, so the FLAC file is equivalent to the original WebM file.

Is there a size limit?

For reliable results keep the input under 300 MB. Very large files run out of memory in the browser rather than failing quietly.

Which browsers are supported?

Any current version of Chrome, Edge, Firefox or Safari on a desktop. The conversion engines need WebAssembly and Web Workers, both of which are standard since 2018.