Is Opus better than MP3?

Substantially, especially at low bitrates. Opus at 32 kbps is clear for speech where MP3 would sound poor, which is why voice and calling applications all moved to it.

Does it play in every browser?

Every current one, Safari included. Only older software is a problem, and an MP3 alongside covers that.

How long an Opus recording can I host?

At speech bitrates, about 40 minutes fit in the free plan's 10 MB and several hours in Pro's 100 MB — far more than any other format would allow.

Host an Opus file and share an audio link

Put Opus audio online at its own address — the best-sounding codec at small sizes, and what most voice apps now use.

You can host:

index.html/assetsfolder.zip

Drop your Opus file here

Any other file or a whole website works too

Choose a fileor drag it anywhere in this box

Free to use. Your OPUS file is live at your-name.99helpers.site in about ten seconds.

What is a .opus file?

Opus is an open, royalty-free audio codec standardised by the IETF in 2012, designed to handle both speech and music better than anything at the same bitrate. It's what WhatsApp voice notes, Discord and every WebRTC call use — you've heard far more Opus audio than you realise.

What people use OPUS files for

Voice notes and speech recordings
Podcast audio at small file sizes
Game and application audio
Streaming where bandwidth matters

What opens a OPUS file

Chrome, Firefox, Edge and Safari
VLC and most modern players
Audacity and FFmpeg
Some older software doesn't support it

How to host a OPUS file

1
Drop your OPUS file in
Drag it onto the box at the top of this page, or click to choose it. Files up to 10 MB work on the free plan and up to 100 MB on Pro, and nothing is uploaded until you publish.
2
Pick an address
Type a name and we'll tell you straight away whether it's free. That becomes the link: voice-recording.99helpers.site
3
Publish and share
Create a free account — that step exists so the file is yours to update, replace or delete — and the link is live within seconds.

The same three steps work for any file — see how file hosting works on 99helpers.com.

What happens when someone opens the link

The audio plays in the browser's built-in player in every current browser.

Why host a OPUS file instead of emailing it?

Opus fits far more audio under a size limit than MP3 does — at 32 kbps it still sounds clear for speech, where MP3 would be unpleasant. For a long recording that matters a great deal.

Worth knowing before you publish

For speech, 24–32 kbps mono Opus sounds better than 128 kbps MP3 and is a quarter of the size.
At those bitrates the free plan's 10 MB holds about 40 minutes of speech, and Pro's 100 MB several hours.
Older software may not read Opus; host an MP3 alongside if the audience is broad.

OPUS hosting questions

Is Opus better than MP3?: Substantially, especially at low bitrates. Opus at 32 kbps is clear for speech where MP3 would sound poor, which is why voice and calling applications all moved to it.
Does it play in every browser?: Every current one, Safari included. Only older software is a problem, and an MP3 alongside covers that.
How long an Opus recording can I host?: At speech bitrates, about 40 minutes fit in the free plan's 10 MB and several hours in Pro's 100 MB — far more than any other format would allow.

Put your OPUS file online now

It takes about ten seconds, and you only make an account once the file is ready to go live.

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Hosting guides for related formats

Host an MP3 audio file Host an OGG audio file Host an M4A audio file Host a FLAC audio file Host a WAV audio file

OPUS is one of over 211 formats you can host — see free file hosting for any file type for the full list, or read the hosting guides for other file types.