ENPTES

Compress an audio file by lowering the bitrate

Drop one audio file, pick a bitrate, and download a smaller file. WAV becomes MP3. The audio stays in this browser.

Runs in your browser Free No sign-up
  1. Choose file
  2. Set options
  3. Get result

Your file never leaves your device. Processed locally in your browser. Nothing is uploaded.

WAV and FLAC become MP3. MP3, M4A and OGG stay in that format at the bitrate you pick.

How to compress audio

1. Drop one audio file. Video and pictures are refused on this page. 2. Leave 96 kbps for a voice note, or pick 64 kbps when the file must be small. 3. Press “Compress audio” and compare the size before you delete the original.

MP3 stays MP3. M4A stays M4A. OGG stays OGG. WAV and FLAC do not have a bitrate, so they are saved as MP3.

What gets smaller

A high-bitrate file drops toward the bitrate you pick. A file that is already tiny may not shrink if you pick 192 kbps, because it is encoded again at that rate. Play the download if the voice starts to sound thin.

This does not cut the timeline and it does not change speed. Use Trim audio when you only need a shorter clip. Use Change volume when the level is the problem, not the size.

The file stays in this tab

The first visit downloads FFmpeg. Later visits reuse the browser cache. You can disconnect after that download finishes. GustKit does not keep the audio.

How to check the smaller audio

1. Play the download next to the original at the same device volume. 2. If speech sounds watery, run again at 128 or 192 kbps. 3. Keep the original until the new file is the one you will send.

96 kbps is the usual voice-note choice. 64 kbps is for a tight message limit. Music wants the higher rates. This page does not trim and does not accept video.

Frequently asked questions

Will 64 kbps sound like the original?

Speech usually stays clear. Music loses detail. Step up to 128 or 192 kbps if the download sounds thin.

Can I compress a video soundtrack here?

No. This page accepts audio files. Extract the audio with Video to MP3, then compress that file. Compress video is the page for a smaller MP4.

Does the length change?

No. The whole file is re-encoded. Only the bitrate changes.

Is the audio uploaded?

No. FFmpeg runs in this tab.

Why did a WAV become an MP3?

WAV has no bitrate to lower. The smaller file is an MP3 at the rate you picked. M4A and OGG stay in their own format.

The new file is not smaller. What happened?

You may have picked a bitrate higher than the original. Choose 64 or 96 kbps and run again.