OPUS to MP3 Converter

How to Convert OPUS to MP3 Online

1. Upload Your OPUS Files: Drag and drop or click "+ Add Files" to select .opus or .ogg audio. Works with WhatsApp voice notes, Telegram audio_*.ogg exports, Discord recordings, and YouTube-extracted Opus tracks. Batch conversion is supported.
2. Pick a Quality Preset or Custom Bitrate: In Advanced Options the default is "Highest". Pick a preset (Low / Medium / High / Highest), set a specific target file size, or enter a custom bitrate. Choose between Constant Bitrate (CBR) for predictable size or Variable Bitrate (VBR) for better quality-per-byte.
3. Audio Channel, Sample Rate, and Trim (Optional): Leave Audio Channel and Audio Sample Rate on "Original" to preserve the source, or downmix to Mono / force 44.1 kHz or 48 kHz. Use Trim to clip start and duration in HH:MM:SS.mmm — useful for snipping a single line out of a long voice note.
4. Convert and Download: Click "Convert". Files process on our servers — no sign-up, no watermark — then download individually or as a ZIP.

Why Convert OPUS to MP3?

Opus is a modern lossy codec standardized by the IETF as RFC 6716 in September 2012 and developed jointly by Xiph.Org, Mozilla, Skype, and Broadcom. It compresses speech and music more efficiently than MP3 at every bitrate — a 32 kbps Opus voice note sounds roughly as clean as a 64 kbps MP3 — but the catch is playback support outside browsers and chat apps is patchy. MP3 (MPEG-1 Audio Layer III) has been ubiquitous since 1993 and plays on essentially every audio device ever made. Converting bridges that gap.

• WhatsApp and Telegram voice notes — Both apps record voice messages as Opus inside an OGG container (.opus on WhatsApp Android, audio_*.ogg on Telegram, typically mono, 16-32 kbps, 48 kHz). Convert to MP3 to play in car stereos, iTunes, podcast editors, or to attach in apps that reject .ogg.
• Older devices and car audio — Pre-2018 head units, many MP3 players, hotel TVs, and exercise equipment still won't decode Opus from USB. MP3 plays everywhere from a 2002 Sony Walkman MP3 player upward.
• Audio editing software — Audacity opens Opus only via the optional FFmpeg library; Adobe Premiere Pro, Final Cut Pro, and DaVinci Resolve do not import .opus natively. Transcoding to MP3 sidesteps the FFmpeg dependency.
• Email, LMS, and CRM uploads — Many web forms, Moodle/Canvas assignment uploaders, and CRM voice-attachment fields whitelist .mp3 but reject .opus or .ogg as unsupported audio MIME types.
• YouTube and Discord extractions — yt-dlp and Discord recording bots often output Opus. MP3 is what most podcast hosts (Buzzsprout, Anchor, Libsyn), audiobook tools, and DAWs expect on import.
• Archival and sharing — A 30-second voice note that's 60 KB in Opus becomes ~480 KB as a 128 kbps MP3 — still tiny, and now playable on every phone, laptop, smartwatch, and connected car your relatives own.

OPUS vs MP3 vs AAC — Format Comparison

Bitrate Cheat Sheet — Opus Source to MP3 Output

The table below is calibrated to common Opus source bitrates so you don't over-encode. Going above the recommended MP3 target won't recover lost detail — it just wastes bytes.

Frequently Asked Questions

How do I get WhatsApp voice notes off my phone to convert?

On Android, file managers see voice messages at Internal storage/Android/media/com.whatsapp/WhatsApp/Media/WhatsApp Voice Notes/<YYYY-MM>/ as PTT-YYYYMMDD-WA####.opus. The folder moved out of the legacy Internal storage/WhatsApp/... location when scoped storage rolled out. On iPhone, long-press a voice message, tap Share, then Save to Files — the result is a .opus file you can upload here.

Are Telegram voice messages also Opus?

Yes. Telegram records voice messages as Opus inside an .ogg container (mono, 48 kHz, around 32 kbps). When you export a chat from Telegram Desktop, voice notes appear as audio_<id>.ogg. Upload either the .ogg or .opus file — both are detected automatically.

Will I lose quality going from Opus to MP3?

There is a small generation loss because both formats are lossy and re-encoding can't add detail that the Opus pass already discarded. In practice, a 32 kbps Opus voice note converted to 128 kbps MP3 is sonically indistinguishable from the original for speech. For music sources, target an MP3 bitrate at or above the Opus source — 160 kbps Opus → 192 kbps MP3 is a sensible floor.

Should I pick Constant Bitrate (CBR) or Variable Bitrate (VBR)?

VBR allocates more bits to complex passages and fewer to silence, giving better quality-per-byte — pick it for music or anything you'll keep. CBR is predictable in size (useful for streaming or fitting into a fixed-size attachment slot) and is the safest bet for legacy hardware MP3 players that sometimes mis-seek in VBR files. If you're not sure, VBR at "High" preset is a good default.

Why does the MP3 come out so much larger than the Opus source?

Opus is roughly 2-3x more efficient than MP3 at low bitrates, so a 60 KB voice note can balloon to 480 KB as a 128 kbps MP3 — even though it sounds the same. That's the cost of universal playback. If size matters more than compatibility, look at Opus to AAC instead (smaller than MP3 at equal quality, and natively supported on Apple devices).

Can I trim a voice note before converting?

Yes. Expand Advanced Options, open the Trim section, and enter a start time and duration in HH:MM:SS.mmm. The trim runs as part of the conversion, so you end up with a clipped MP3 in one pass. For multi-clip edits, use the dedicated Audio Cutter tool first, then transcode.

Does converting Opus to MP3 work on iPhone, iPad, and Safari?

Yes. The entire conversion runs in our cloud, so it works in Safari, Chrome, and any modern browser on iOS, iPadOS, macOS, Windows, Android, and Linux. iOS Safari can play the resulting MP3 inline and AirDrop it back to Mac or to other Apple devices.

What if I have hundreds of Opus voice notes — is there a file count limit?

No file count limit for batch. Drop the whole folder in at once and convert with a single click. For very large batches (1000+ files), you may prefer splitting into chunks of 200-300 so the ZIP download stays manageable.

What about the reverse — MP3 to Opus?

Use MP3 to Opus if you need to send audio to a system that prefers Opus (modern WebRTC apps, Discord bots, low-bandwidth IoT). For lossless WAV intermediate workflows, Opus to WAV preserves everything Opus encoded, ready for editing.