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Convert OPUS to FLAC
Most music players, car stereos and editors cannot open the .opus voice notes saved from WhatsApp. FLAC compresses audio to roughly half size without losing any quality.
- Free
- No sign-up
- Batch conversion
Why convert OPUS to FLAC?
To convert OPUS files to FLAC, drop them on the counter above.
Most files convert in seconds: no queue, no email address, and the FLAC result saves straight to your computer or phone.
How to convert OPUS to FLAC
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Add your OPUS files
Drag your OPUS files onto the counter or pick them with Choose files. You can add several at once.
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Check the settings
The defaults suit most cases. Change quality, size or other options if you like; after a change, one click converts again.
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Conversion starts by itself
Each file is converted to FLAC and its row is stamped CONVERTED.
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Download your FLAC file
Get the file with Download. With several files you can download them all as one ZIP.
OPUS vs FLAC
| Property | OPUS | FLAC |
|---|---|---|
| Full name | Opus Interactive Audio Codec | Free Lossless Audio Codec |
| Type | Audio | Audio |
| Compression | Lossy | Lossless |
| Created by | IETF (RFC 6716) | Xiph.Org Foundation |
| Year | 2012 | 2001 |
| Extensions | .opus | .flac |
| MIME | audio/opus | audio/flac |
About the formats
OPUS
Opus Interactive Audio Codec
Opus is an open audio codec for speech and music with very low latency. WhatsApp voice notes are saved as .opus files.
FLAC
Free Lossless Audio Codec
FLAC is an open format that compresses audio to roughly half size without losing any quality. Music archivists and hi-fi listeners prefer it.
Frequently asked questions
Is converting OPUS to FLAC free?
Yes, completely free. No account, no daily limit, no watermark and no queue.
Does it work on a phone?
Yes. It works on iPhone, iPad and Android, with no app to install.
Is there a file size limit?
There is no size limit set by us. Files of hundreds of MB convert too; very large files take longer and are handled more comfortably on a computer than on a phone.
Other conversions
| Family | Give | → | Get | What you gain |
|---|---|---|---|---|
| FLAC | OPUS | most efficient for speech · smaller file | ||
| OPUS | MP3 | plays on every device | ||
| OPUS | WAV | lossless, ready to edit · larger file | ||
| OPUS | M4A | better than MP3 at the same size | ||
| OPUS | AAC | broadcast-grade audio | ||
| OPUS | OGG | open and royalty-free | ||
| WAV | FLAC | lossless at half size | ||
| MP3 | FLAC | lossless at half size · MP3 recording | ||
| M4A | FLAC | lossless at half size · iPhone voice memo | ||
| AAC | FLAC | lossless at half size · raw AAC stream | ||
| OGG | FLAC | lossless at half size · Telegram voice message | ||
| WMA | FLAC | lossless at half size · old Windows Media audio |