OPUS to FLAC converter
Convert OPUS to FLAC in seconds, free and unlimited. No upload, no sign-up, no watermark: your audio never leaves your device.
Last updated
Quick answer: To convert OPUS to FLAC, add the OPUS file to the iHateFiles OPUS to FLAC converter and press Convert. The conversion runs in your browser, so the file is never uploaded, and it is free with no sign-up, watermark or size limit. A lossless target, so nothing is thrown away in this step.
Should you convert OPUS to FLAC?
Do this when an editor, DAW or device needs FLAC. It will not make the OPUS sound any better, and the file grows several times over.
FLAC will not restore what OPUS removed
FLAC stores every sample exactly, including the damage OPUS compression already did. Expect 5 to 7 MB per minute instead of 0.25 to 1 MB, for audio that sounds identical. Do it because an editor or device needs FLAC, not to improve the sound.
Where the FLAC will play
FLAC plays on VLC, Android, Windows 10 and later, and recent Macs.
OPUS and FLAC side by side
| OPUS | FLAC | |
|---|---|---|
| Inside the file | Opus | FLAC |
| Compression | Lossy | Lossless |
| Carries sound | Yes | Yes |
| One minute of stereo | 0.25 to 1 MB | 5 to 7 MB |
| Plays on | browsers, Android, WhatsApp and Discord, but not many car stereos or older players | VLC, Android, Windows 10 and later, and recent Macs |
| Here | Read and write | Read and write |
What usually goes wrong
About the OPUS. Opus at 64 kbps sounds better than MP3 at 128, so the bitrate you are used to is roughly double what you need here.
About the FLAC. Converting an MP3 to FLAC produces a large file that sounds exactly like the MP3. Lossless compression preserves what it is given, including the damage.
How to convert OPUS to FLAC
- Add your OPUS file. It is read from your disk and stays there.
- Check the settings. The output format is already set to FLAC.
- Press convert and the FLAC file is saved back to your device.
Questions
How do I convert OPUS to FLAC?
Open this page, add your OPUS file, and press convert. The file is decoded and re-encoded by your own browser and saved back to your device. Nothing is uploaded.
Is this OPUS to FLAC converter free?
Yes, completely. There is no account, no sign-in, no watermark and no daily limit, because there is no server doing the work. Your own device does it.
Are my files uploaded anywhere?
No. There is no upload endpoint. The conversion runs inside this browser tab, so your file never leaves your device. You can open your browser's network panel and watch: nothing carrying your file is sent.
Is there a file size limit?
No fixed limit. Because the work happens on your machine there is no server quota. The only ceiling is your own device's memory, which for video means very large files may be slow.
Will converting to FLAC lose quality?
FLAC is lossless, so this step throws nothing away. If the original was already a lossy format, the damage it did cannot be undone, but nothing further is lost.
Can I convert several OPUS files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.