Audio Compressor

Compress audio

Choose a size preset, see a rough size estimate, then download a smaller MP3 without uploading.

Runs in your browser. Your audio stays on this device — nothing is uploaded to BrowserSpaces for processing.

Presets

Small, balanced, or high quality.

Sample rate

Downsample when you need smaller files.

Bitrate

Control MP3 kbps.

Estimate

Rough size before you encode; exact size after.

Use the tool

Audio or video

No file selected.

MP3, WAV, M4A, OGG, FLAC, or video with audio.

How it works

Downsample + lossy encode

PCM is optionally resampled, then encoded as MP3 at your chosen bitrate. Size savings come from lossy compression.

Three steps