PureConverter

Convert FLV to OPUS

Convert FLV files to OPUS locally, completely free and with maximum privacy.

Drag and drop your files here

or click to browse local files (large files supported, limited only by browser RAM)

Upload Files

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How to convert FLV to OPUS

  1. Drop your .flv files above, or click Upload Files. You can add many files at once.
  2. OPUS is already selected as the output. Open the settings (gear icon) to fine-tune the result.
  3. Click Convert All. FFmpeg runs inside your browser through WebAssembly; nothing is uploaded.
  4. Download your .opus files as soon as each one finishes.

What to know about FLV to OPUS conversion

  • Only the audio track of the FLV video is kept and encoded as OPUS; the picture is discarded.
  • Videos without an audio track cannot be converted to audio.

FLV vs OPUS

FLV (Flash Video): A legacy streaming video container popularised by Adobe Flash Player.

OPUS (Opus Audio Codec): A highly versatile, open-source lossy audio format developed by the Xiph.Org Foundation, optimized for speech and high-fidelity streaming.

Conversion options

  • Bitrate from 96 to 320 kbps
  • Mono, stereo or 3D spatial audio
  • Playback speed (0.5× to 2×)

Frequently asked questions

Is it safe to convert FLV to OPUS here?

Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.

Is there a file size limit?

There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.

Can I convert several FLV files at once?

Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.

Related conversions

Convert FLV to other formats

Convert other formats to OPUS

See every FLV converter and OPUS converter, or browse the full converter directory.