Make a recording light enough to actually send
- Name the size it must fit under
- Pick how much fidelity to keep
- Nothing leaves your machine
A lecture, an interview, a rehearsal take — recordings pile up megabytes fast, and messengers and inboxes push back. This page re-encodes the sound on your own device: choose how much fidelity to keep, or name the size it must squeeze under, and send the result on its way. Nothing about the recording leaves your machine.
Built for the spoken word
Small is tuned for lectures, meetings and voice notes, where the file can fall dramatically and every word stays crisp.
Length and channels untouched
Nothing is trimmed and stereo is never folded to mono to cheat the size down.
Lossless leaves as MP3
WAV, FLAC and AIFF cannot get smaller in their own skin, so they come back as MP3 — the one format every player opens.
Private by construction
A meeting recording is nobody else’s business, and here it never becomes anyone else’s bytes: the encode runs where the file already lives.
Quality first, or a number first
The presets read the same as the other compressors on this site but mean something different for sound. High is for music, where the whole spectrum matters. Balanced covers podcasts and mixed material. Small leans on how forgiving speech is and produces the featherweight files people are usually after here.
When a hard cap is the real problem — a 25 MB attachment rule, a form that stops at 10 — type the number instead. Bitrate is stepped down until the projected file clears it, and a recording too long to clear it at listenable quality earns a plain statement of the smallest size it can honestly reach.
What this page refuses to do
It will not touch the sound beyond making it smaller. No noise removal — that lives in its own tool here, built for exactly that job. No normalising, no trimming, no fading. A compressor that quietly “improves” your audio on the way through is editing it without asking, and that is the one liberty this site never takes with a file.
Frequently asked questions
How small can a voice recording actually get?
Far smaller than people expect. Speech survives heavy compression because it occupies a narrow band of sound — the Small preset can take an hour-long lecture down to a fraction of its size and every word stays clear. Music is the opposite: it fills the spectrum, so treat it more gently with High.
Why does my WAV come back as an MP3?
A WAV is uncompressed, so saving it again as a WAV gives you the same size back — it would not be a compressor. MP3 is where the saving comes from, and every phone, browser and player opens it. The same goes for FLAC, AIFF and OGG. MP3 and M4A files come back as themselves.
Does it cut the recording short, or drop a channel?
No. The length and the number of channels are exactly what they were. A stereo recording stays stereo and a mono one stays mono, which is also why a mono file is given half the budget of a stereo one and still sounds the same.
Will it clean up background noise or even out the volume?
No — this page only reduces the byte count. Hiss and hum are a different job, and the noise remover on this site is the tool that does it. Volume levelling is not offered at all yet.
My recording has to fit under an email attachment cap. How?
Type the cap into the size limit — say 25 for Gmail — and drop the file. The encoder walks down through bitrates until the projected size clears the number, and if this length of audio cannot clear it at listenable quality, you are told the size it can honestly reach instead.
What audio formats does it read?
MP3, WAV, M4A, AAC, OGG, Opus, FLAC and AIFF, among others — essentially anything your browser can decode. Long material is fine: a twenty-minute uncompressed recording has been through without trouble, with your device’s memory as the only real bound.