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OPUS File Format

Opus Audio category

Opus is today’s most efficient voice/music codec — WhatsApp, Telegram, Discord and YouTube all use it.

Typical use: Opus delivers the smallest files with the best quality for streaming and messaging.

About the OPUS format

Opus (IETF RFC 6716, 2012) is the codec that ended the argument: it merges Skype's CELT and Xiph's SILK into one royalty-free format that is simultaneously the best low-latency speech codec and a superb music codec. WebRTC calls, Discord, WhatsApp, WhatsApp calls, YouTube's low-bitrate streams and Zoom all run on it.

At 6 kbps it keeps speech intelligible; at 128 kbps it is transparent for music; latency can dip below 5 ms for live conversation. Its weakness is hardware: dedicated chips and some car/hi-fi devices still lack it, and standalone .opus files are less recognized than MP3 on random devices.

Strengths

  • ✓ Best quality-per-bit across speech and music
  • ✓ Ultra-low latency — built for live calls
  • ✓ Royalty-free IETF standard

Limitations

  • ✗ Hardware support still incomplete
  • ✗ Not a mastering or archival format
Compression
Lossy (6–510 kbps)
Quality
State of the art
Compatibility
Software strong, hardware lagging
Best for
Calls, live streams, chat

Convert OPUS to…

26 direct directions plus 18 workflows, sorted A–Z; 🔥 marks popular targets.

OPUS to AAC Hot OPUS to AC3 OPUS to AIF OPUS to AIFF OPUS to ALAC OPUS to AU OPUS to CAF OPUS to E-AC3 OPUS to F4A OPUS to F4B OPUS to FLAC Hot OPUS to GSM OPUS to M4A Hot OPUS to M4B OPUS to M4R OPUS to MP2 OPUS to MP3 Hot OPUS to OGA OPUS to OGG Hot OPUS to PCM OPUS to TTA OPUS to VOC OPUS to W64 OPUS to WAV Hot OPUS to WAVPCM OPUS to WV

Cross-engine workflows

OPUS to 7Z OPUS to APK OPUS to JAR OPUS to MKV OPUS to MOV OPUS to MP4 OPUS to PNG OPUS to PNG24 OPUS to PNG8 OPUS to TAR OPUS to TAR.BZ2 OPUS to TAR.GZ OPUS to TAR.XZ OPUS to TBZ2 OPUS to TGZ OPUS to TXZ OPUS to WIM OPUS to ZIP

Convert other files to OPUS…

AAC to OPUS Hot AC3 to OPUS AIF to OPUS AIFF to OPUS ALAC to OPUS AMB to OPUS AMR to OPUS APE to OPUS AU to OPUS AVR to OPUS CAF to OPUS CVS to OPUS CVU to OPUS DSS to OPUS DTS to OPUS E-AC3 to OPUS F32 to OPUS F4A to OPUS F4B to OPUS F64 to OPUS FAP to OPUS FLAC to OPUS Hot FSSD to OPUS GSM to OPUS GSRT to OPUS HCOM to OPUS HTK to OPUS IRCAM to OPUS M4A to OPUS Hot M4B to OPUS M4R to OPUS MAUD to OPUS MOD to OPUS MP2 to OPUS MP3 to OPUS Hot OGA to OPUS OGG to OPUS Hot OMA to OPUS PAF to OPUS PVF to OPUS QCP to OPUS S16 to OPUS S24 to OPUS S32 to OPUS S3M to OPUS SD2 to OPUS SHN to OPUS SMP to OPUS SNDR to OPUS SNDT to OPUS SPX to OPUS TAK to OPUS TTA to OPUS TXW to OPUS U8 to OPUS VMS to OPUS VOC to OPUS VQF to OPUS W64 to OPUS WAV to OPUS Hot WAVPCM to OPUS WMA to OPUS WV to OPUS WVE to OPUS XI to OPUS XM to OPUS

Cross-engine workflows

3G2 to OPUS 3GP to OPUS ASF to OPUS AVI to OPUS DivX to OPUS DV to OPUS F4V to OPUS FLV to OPUS H.264 to OPUS M1V to OPUS M2TS to OPUS M2V to OPUS M4V to OPUS MJPEG to OPUS MKV to OPUS MOV to OPUS MP4 to OPUS MPEG to OPUS MPEG1 to OPUS MPEG2 to OPUS MPEG4 to OPUS MPG to OPUS MTS to OPUS MXF to OPUS OGV to OPUS RM to OPUS RMVB to OPUS TS to OPUS VOB to OPUS WEBM to OPUS WMV to OPUS WTV to OPUS Xvid to OPUS Y4M to OPUS

Frequently asked questions

What is a OPUS file?

Opus is today’s most efficient voice/music codec — WhatsApp, Telegram, Discord and YouTube all use it.

How do I convert OPUS files online?

Pick a target format from the "Convert OPUS to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.

Is it safe to convert OPUS files here?

Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.

Which formats can OPUS convert to?

This page lists all 44 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.