FLAC to OPUS converter
Convert FLAC to OPUS in seconds, free and unlimited. No upload, no sign-up, no watermark: your audio never leaves your device. Re-encodes the audio into OPUS.
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Quick answer: To convert FLAC to OPUS, add the FLAC file to the iHateFiles FLAC to OPUS 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. Re-encodes the audio into OPUS.
Should you convert FLAC to OPUS?
Do this to make a lossless recording small enough to share or carry around. Keep the FLAC as the master copy.
FLAC is lossless and OPUS is not
This is the conversion lossy formats were designed for: from 5 to 7 MB per minute to 0.25 to 1 MB. At 192 kbps or more almost nobody can hear the difference in music. Keep the FLAC as your master if you might need to convert again.
Where the OPUS will play
OPUS plays on browsers, Android, WhatsApp and Discord, but not many car stereos or older players.
FLAC and OPUS side by side
| FLAC | OPUS | |
|---|---|---|
| Inside the file | FLAC | Opus |
| Compression | Lossless | Lossy |
| Carries sound | Yes | Yes |
| One minute of stereo | 5 to 7 MB | 0.25 to 1 MB |
| Plays on | VLC, Android, Windows 10 and later, and recent Macs | browsers, Android, WhatsApp and Discord, but not many car stereos or older players |
| Here | Read and write | Read and write |
What usually goes wrong
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.
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.
How to convert FLAC to OPUS
- Add your FLAC file. It is read from your disk and stays there.
- Check the settings. The output format is already set to OPUS.
- Press convert and the OPUS file is saved back to your device.
Questions
How do I convert FLAC to OPUS?
Open this page, add your FLAC 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 FLAC to OPUS 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 OPUS lose quality?
OPUS is a lossy format, so some detail is discarded. The quality control on this page decides how much. The default is set high enough that most people cannot see the difference.
Can I convert several FLAC files at once?
Yes. Add as many as you like and they are converted one after another, then offered as a single ZIP.