Step 01
Upload your audio files
Add one or more audio files to the compression queue. Each file stays in your browser during processing.
WMA Compressor
Upload your WMA files and compress them with configurable bitrate, sample rate, channels, and output format.
FAST · STABLE · PRIVACY
Upload audio files to compress
Only WMA input is accepted on this page.
Files in queue: 0/50
Output format
Compression level
Bitrate
Sample rate
Channels
How to compress audio online in 3 simple steps
FreeTTS Audio Compressor lets you upload files, tune compression settings, and reduce file size directly in your browser.
Step 02
Set compression configuration
Choose output format, compression level, bitrate, sample rate, and channels based on your quality and file-size goals.
Step 03
Compress and review result size
Run compression in batch, check before/after size percentage for each file, then download single outputs or all results together.
Why use FreeTTS Audio Compressor
Control output quality and size with practical compression options while keeping everything inside your browser workflow.
Configurable compression settings
Adjust bitrate, sample rate, channels, and compression level to balance output quality and file size.
Same-format compression supported
Compress MP3 to MP3, WAV to WAV, and more when you need a smaller file without changing container format.
Before and after size visibility
See percentage size change per file so you can quickly confirm whether the selected settings reduce file size as expected.
Batch queue with easy export
Compress up to 50 files in one queue, then download individual files or all completed outputs in one ZIP.
Audio Compressor FAQ
Learn how compression settings work, what happens if file size grows, and how to optimize results for your audio files.
Yes. You can compress files while keeping the same output format, such as MP3 to MP3.