Practical focus
Use this page when you need to compress several related audio files with consistent settings.
Private browser-based audio compression
Batch Audio Compressor
Batch compress voice memos, podcast clips, sound effects, and audio asset folders with one settings pass.
Your audio is compressed locally in your browser. Files are not uploaded to a server.
MP3 / WAV / M4A / AAC / OGG / FLAC inputMP3M4A / AACOGG
File-
Size-
Duration-
Your audio is compressed locally in your browser. Files are not uploaded to a server.
Compression mode
Advanced settings
Select an audio file to begin.
Compression result
Original size-
Compressed size-
Saved-
Output-
Bitrate-
The batch workflow is designed for selecting multiple files. Browser compression processes files one by one; on mobile, many files can be slower, so keep batches to 20 files or fewer.
Quick tips
- Batch works best for similar files.
- Test one sample before processing the whole set.
- Do not load too many huge files at once.
How to use
- Start with one representative file and confirm the bitrate, format, and channel settings sound right.
- Add files that are similar in content, such as a set of voice memos or podcast clips.
- Use the same settings for a batch when consistent loudness and quality expectations matter.
- Download files individually or as a ZIP when the batch is complete, then spot-check several outputs.
Recommended settings
| Batch type | Suggested approach |
|---|---|
| Voice memo batch | MP3, mono, 64-96 kbps |
| Podcast clips | MP3, 96-128 kbps |
| Sound effects | OGG/MP3, 64-128 kbps |
| Mixed music files | Avoid one-size-fits-all settings |
| Large WAV batch | Process fewer files at a time |
Supported formats
Batch input can include common audio formats such as MP3, WAV, M4A, AAC, OGG, and FLAC.
MP3 is the simplest shared output; OGG may fit game or web asset batches.
Quality vs file size
Batch compression is about consistency and time saving, not a magic setting for every file.
A single bitrate may work for a group of voice memos but not for a mixed folder of music, effects, and lectures.
Privacy and local processing
Compression runs in your browser, so the original audio is not uploaded to a server.
Large files can still be slow because decoding and encoding use your device memory and CPU.
Things to watch
- Large batches use significant browser memory.
- Mixed content should be split into smaller groups with different settings.
FAQ
How many audio files can I compress at once?
It depends on file size and device memory. For large files, process fewer at a time.
Should I use the same settings for every file?
Yes for similar files; no for mixed music, voice, and effects.
Can I download all compressed files as a ZIP?
Yes, the batch workflow can package completed outputs when available.
Why is batch compression slow?
Each file must be decoded and encoded locally in the browser.
Should I test one file before compressing the whole batch?
Yes. A sample test avoids wasting time on poor settings.