Audio Compressor

Reduce audio file size in seconds with Audio Compressor. Compress MP3, WAV, FLAC, M4A, AAC, OGG and WMA files right on your phone to free up storage and make songs, voice notes, podcasts and recordings easier to send.

OFFLINE AND PRIVATE
Everything runs on your device. Your audio is never uploaded to a server, and the app works without internet. You pick each file yourself, and no storage permission is needed.

AUDIO COMPRESSOR FOR EVERY COMMON FORMAT
• MP3 compressor: shrink songs, ringtones and recordings
• WAV compressor: large WAV files become small M4A files, or keep WAV
• FLAC compressor: save space on lossless music, as M4A or keep FLAC
• M4A, AAC, OGG and WMA compressor
• AIFF and AIF support

CHOOSE HOW SMALL YOUR FILES GET
• Quality scale from 1 to 10 for a quick result
• Bit rate up to 512 kbps, by slider or exact value
• Sample rate: keep the original or choose 8,000 to 48,000 Hz
• Channels: original, mono or stereo (mono is about half the size and works well for speech)
• Normalize volume so quiet and loud files sound even
• Fade in and fade out up to 30 seconds

BATCH AUDIO COMPRESSION
Compress many files at once and mix formats in the same batch: MP3, WAV, FLAC and more. Remove any file from the list before you start.

SEE THE RESULT BEFORE YOU SAVE
• Original size, new size and percent saved for every file
• Total space saved for the whole batch
• Play the audio before and after compression
• Save all files into a folder you choose

GREAT FOR
• Freeing up phone storage used by music and recordings
• Making voice notes, podcasts and interviews smaller
• Shrinking large WAV and FLAC recordings
• Reducing the size of lectures and audiobooks with mono

HOW TO USE
1. Tap the select files button and select your audio files
2. Choose Quality or Bit rate, plus any extra options
3. Tap Start Compressing
4. Preview the results and save them to your phone

A NOTE ON QUALITY
Smaller files come from a lower bit rate. At higher settings the difference is hard to hear, and at lower settings you save more space. You choose the balance. Files that are already highly compressed may shrink only a little, and the app shows the real result before you save.

FREE TO USE
Audio Compressor is free and supported by ads. Single-file compression is always available. Batch compression is unlocked by watching a short ad.

DEVELOPER'S NOTE
Hi, I'm Suman Sharma, an independent developer from Pokhara, Nepal. I built Audio Compressor to be a simple, private and reliable audio file size reducer. Your feedback helps me improve it.

FEEDBACK
Enjoying the app? Please leave a review. For any issue or suggestion, email sumansharmadeveloper@gmail.com. I read every message.

Download Audio Compressor and reduce your audio file size now.

Recent changes:
What's new in Audio Compressor:

• Compress WAV, FLAC and AIFF to small M4A files, or keep the original format
• Reduce audio file size with Quality 1-10 or an exact bit rate up to 512 kbps
• New options: sample rate, mono/stereo, volume normalize, fade in/out
• Batch compression with mixed formats (MP3, WAV, FLAC, M4A and more)
• Before and after size for every file, then save all to any folder
• Offline and private, no storage permission
• Faster, more stable compression and bug fixes