How to compress an audio file
- Drop your file into the upload box — the compressor shows its current size, duration and sample rate.
- Click a target preset like Discord 8 MB or Email 25 MB, or set the MP3 bitrate, sample rate and channels by hand.
- Watch the live estimate — it shows the projected size and how much smaller it will be.
- Press Compress & Download to save the shrunken file straight to your device.
This audio compressor shrinks file size the practical way: it re-encodes your track to MP3 at a lower bitrate and, when you ask, downsamples it or folds stereo into mono. That is usually enough to take a chunky WAV or 320 kbps export and squeeze it under a 8 MB Discord cap, a 25 MB email attachment or a WhatsApp voice limit. It is built for creators who just need a file to send: podcasters trimming an episode for a guest, musicians sharing a rough mix, students handing in a voice memo. Everything runs in your browser, so there is no upload wait and your audio never leaves your device.
FAQ
How do I compress an audio file to fit Discord or email?
Drop the file in, then click a preset like Discord 8 MB or Email 25 MB. The tool picks the highest MP3 bitrate that still fits under that limit and shows the estimated size before you commit. Press Compress & Download and the smaller file saves straight to your downloads.
What is the difference between this and a normal audio converter?
Both can output MP3, but this tool is built around shrinking size: it leads with target-size presets, a live estimate of the new file size and the percentage saved, and combines a lower bitrate, downsampling and mono mixdown to hit a specific limit. The converter is about format and quality choices rather than fitting a size cap.
Will compressing audio reduce the sound quality?
A lower MP3 bitrate does discard some detail, but the loss is mild at 128 kbps and up and is fine for speech, voice notes and casual music sharing. For spoken word you can drop to 64–96 kbps with mono and 22 050 Hz and still sound clear while cutting size dramatically.
Are my files uploaded to compress them?
No. Decoding, resampling and MP3 encoding all run as JavaScript on your own device. Nothing is sent to a server, so there are no upload waits, no size caps beyond your device's memory, and your audio stays private.