Audio Compressor
Re-encode audio to a smaller MP3 — podcasts, voice notes, and music shares.
Drop a audio file to compress
Output: MP3 · re-encoded in your browser
No server upload — processed on your device
Computer · URL · cloud · drag & drop
Audio Compressor by format
Re-encode MP3 at a lower bitrate for a smaller download.
Compress WAV masters into a smaller MP3 for sharing.
Compress M4A/AAC audio into a smaller MP3.
Compress lossless FLAC into a smaller MP3 for delivery.
Compress OGG/Vorbis audio into a smaller MP3.
How to use this tool
Pick a format tool
Open a format-specific page below (for example MP3 Compressor) when you know the extension, or use the general audio compressor on this page.
Add your file
Drop a file up to 100 MB. Compression stays in this tab — no third-party conversion queue.
Download the smaller file
Tune quality, then save the result locally when the size looks right.
Frequently Asked Questions
More on quality loss: conversion quality guides · compression guides
Is the audio compressor free?
Yes. Format Convertly compresses files in your browser with no signup or watermark.
Do you upload my files?
No. Compression runs on your device. There is no server copy of your files.
Why are there format-specific pages?
Each tool accepts the right extensions and sets a sensible output — for example MP3 Compressor and WAV Compressor.
Does compressing audio reduce quality?
Lossy MP3 output discards some detail by design. Prefer WAV/FLAC masters and compress once for sharing.
Does WAV to MP3 lose quality?
Yes technically. At sensible bitrates most listeners are fine — archive the WAV/FLAC original.
How does audio compression work?
Delivery compressors re-encode to a smaller MP3 at a bitrate bias. See How audio compression works and How bitrate affects file size.
Should I compress from WAV or from MP3?
Prefer WAV/FLAC masters. Re-encoding MP3→MP3 stacks loss — covered under Lossy vs lossless compression.
Where can I learn more about compression?
Browse Format Convertly’s Compression guides — what compression is, lossy vs lossless, image/video/audio how-tos, bitrate, and PDF size tips — each links back to the matching compressor.
Ready to convert more formats?
Browse converters or jump back to the tool above.