Compress Audio Without Losing Quality

It depends on the source format and preset chosen. Compressing a WAV file to 128 kbps MP3 can reduce size by up to 90%. Compressing an already-compressed MP3 gives smaller gains. The size estimate shown before compression gives you a live preview of the expected output.

The High preset (192 kbps) is nearly transparent — most people cannot distinguish it from the original on standard speakers or earphones. Medium (128 kbps) is suitable for streaming and voice. Low (96 kbps) and Podcast (64 kbps) are best for voice-only content where file size is the priority.

High (192 kbps) — for music you listen to on quality headphones. Medium (128 kbps) — for general music and podcasts on any device. Low (96 kbps) — for background music or file size-sensitive situations. Podcast (64 kbps) — for spoken-word voice content only.

Your file is uploaded securely to our server, compressed using professional FFmpeg encoding, then immediately and permanently deleted — we never retain your audio. The entire process typically completes within seconds. Also try our Audio Format Converter for format changes.

You can upload MP3, WAV, FLAC, AAC, M4A, OGG, and OPUS files for compression. The output is always MP3 — the most universally compatible format. For a different output format, first compress then use our Audio Format Converter.

The Podcast preset compresses audio to 64 kbps — optimal for speech and voice recordings where clarity matters more than music fidelity. It produces very small files ideal for podcast episodes, voice notes, and interviews. Not recommended for music.

This can happen when your source file is already heavily compressed at a low bitrate (e.g., 64 kbps MP3) and you selected a higher preset (e.g., High 192 kbps). The compressor cannot add quality that wasn't there — always use a preset equal to or lower than your original bitrate.

Yes — completely free, no account, no limit on files. Compress as many audio files as you need. Also try our free MP3 Audio Extractor to extract audio from social media videos before compressing.