What audio formats are supported?

MP3, WAV, OGG, AAC, FLAC, and most common audio formats. Output can be MP3 or OGG.

How much can I reduce file size?

WAV or FLAC to MP3 can reduce the size by 80–90%. Re-encoding an MP3 at a lower bitrate typically saves 30–60%. When a setting would not make the file lighter (an MP3 already at 128 kbps re-encoded at 192), the original is kept.

Is my audio uploaded?

No. All compression happens in your browser using FFmpeg WebAssembly. Your audio never leaves your device.

What bitrate should I choose?

128 kbps is good for speech and podcasts. 192 kbps is ideal for music. 320 kbps offers near-CD quality.

Why does the first run take longer?

FFmpeg WebAssembly (~30 MB) is downloaded on first use and cached. Subsequent compressions start immediately.

Does it work on mobile?

Yes, but processing may be slower on mobile devices. Large files (50+ MB) work best on desktop.

Audio Tool · 100% local

Audio Compressor

Compress MP3, WAV, OGG, M4A and FLAC audio files to MP3 or OGG. Choose the bitrate to balance quality and size. Powered by FFmpeg in your browser.

100% local

Output

Bitrate

Drag & drop an audio file here

or browse your files

MP3, WAV, OGG, AAC, M4A, FLAC · Max 100 MB per file

Result

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Will your file go through?

WhatsApp 16 MB, Gmail 25 MB, Discord 20 MiB… Drop a file to see which platforms accept it — and make it fit in one click.

Check where your file fits See all file size limits

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Everything about Audio Compressor

Why use an audio compressor tool?

Compress audio files to reduce size. Adjust bitrate for MP3, WAV, OGG. Powered by FFmpeg running 100% in your browser. Whether you need this for personal projects, professional work, or quick one-off tasks — our browser-based tool handles it with no installation, no signup, and no file uploads to external servers. Everything runs locally in your browser for maximum speed and privacy.

Common use cases

Streamlining everyday tasks that would otherwise require specialized software. Quick processing when you need results immediately without installation. Handling one-off tasks that don't justify subscribing to a dedicated tool. Working from any device — desktop, tablet, or phone — with just a browser. Processing sensitive data locally without uploading to third-party servers. Professional-quality results for personal, academic, or business use.

Features & technical details

All processing happens entirely in your browser — no files are uploaded to any server, ensuring complete privacy. Instant results with no waiting or queuing. Works on all modern browsers (Chrome, Firefox, Edge, Safari) on desktop and mobile. No account required — the tool is free for everyday use. Supports drag-and-drop for file inputs. Clean, accessible interface that works on any screen size.

How it works

How to compress audio

Upload audio
Drag and drop or browse to select an audio file (MP3, WAV, OGG, etc.).
Adjust settings
Choose output format and bitrate. Lower bitrate = smaller file but lower quality.
Download compressed audio
Preview the result and download your compressed audio file.

Practical guides

Tips & guides

Quality vs size

Choose the right bitrate for your use case. 128 kbps works great for podcasts and voice recordings. Music sounds best at 192-256 kbps.

Converting WAV to MP3 gives the biggest savings. Already-compressed MP3 files benefit less from re-encoding.

Pro tip

100% private

Your audio files are processed locally. Nothing is uploaded, stored, or tracked.

Safe for compressing confidential recordings, voice memos, and copyrighted music.

Privacy

Frequently asked questions

Everything about audio compression