Compress Audio Online — Reduce Audio File Size Free

Audio files too large for email or storage? The MyPDF Audio Compressor reduces file size by adjusting bitrate, sample rate, and encoding — while keeping the audio sounding great.

How to Compress Audio

1. Upload your audio file (MP3, WAV, FLAC, AAC, OGG).
2. Choose the target bitrate, format, and quality level.
3. Download the compressed audio instantly.

Compression Settings

Bitrate	Quality	File Size (per min)	Best For
320 kbps	Excellent	~2.4 MB	Music archival
192 kbps	Very good	~1.4 MB	General listening
128 kbps	Good	~1 MB	Podcasts, speech
64 kbps	Acceptable	~0.5 MB	Voice memos, previews

Practical Tips

• 128 kbps MP3 is sufficient for speech and podcasts — most listeners cannot tell the difference from higher bitrates for spoken content.
• Convert WAV to MP3 for the biggest savings — a 50 MB WAV file becomes roughly 5 MB as 192 kbps MP3.
• Reduce sample rate to 22050 Hz for speech-only content — voice doesn't need the full 44100 Hz range.

How much can I compress audio?

A lossless WAV file can be reduced by 90%+ when converting to MP3. Already-compressed MP3 files can typically be reduced 30-50% by lowering the bitrate.

Will compression affect audio quality?

Lower bitrates remove high-frequency detail. For music, stay at 192+ kbps. For speech, 128 kbps is usually indistinguishable from the original.

Related Tools

• Convert Audio — convert between audio formats
• Audio Trim — trim to reduce duration
• Audio Normalize — normalize volume levels
• Audio Merge — combine audio files