Compress Audio to Target Size
Select a size preset or enter a custom target, then compress audio files to fit.
or drop files here
Maximum file size: 200MB per file
Supported Formats
Supports all common audio formats. Output format can be selected below.
Supported input: MP3, WAV, OGG, AAC, M4A, FLAC, and more
Supported output: Original, MP3, WAV, OGG, AAC
How to Use This Tool
Select Your Files
Tap the upload button or drag your files into the area. You can add several files at once — handy when prepping a batch for WhatsApp or email.
Start Processing
Choose your settings and start. Processing happens right on your phone or computer, so it works even on limited mobile data.
Download the Results
Save the smaller files to your device, then share them on WhatsApp, attach to email, or upload to a portal. Your originals stay untouched.
Frequently Asked Questions
How do I compress an audio file to an exact size such as 1MB?
Upload your file, enter 1MB as the target and start compression. Multi-pass optimisation adjusts the bitrate until the output lands at or just below 1,048,576 bytes. A 3-minute song needs roughly 45 kbps to fit, which keeps speech clear and music acceptable.
Which audio formats can I compress?
MP3, WAV, OGG, AAC, M4A, FLAC and most other common formats are supported as input. Output is encoded to MP3 or OGG for maximum compatibility. Since everything runs in your browser, even large files of several hundred megabytes can be processed without any upload waiting time.
How much quality do I lose when compressing audio?
It depends on the target size versus the duration. A 3-minute song at 5MB gets roughly 227 kbps, which sounds nearly identical to the source. At 1MB, the same song drops to about 45 kbps, where artefacts appear in the music but spoken content remains clear.
What bitrate will my audio get after compression?
The tool divides your target size by the file duration to work out the required bitrate, and then fine-tunes it in multiple passes. A 4-minute track targeted at 10MB lands near 340 kbps, while the same track at 1MB drops to around 34 kbps.
Can I compress a WAV file under 5MB?
Yes. WAV files are uncompressed, so a 3-minute stereo track is often over 30MB. Targeting 5MB converts it to a compressed format at roughly 225 kbps, cutting the size by about 84% while keeping the quality high enough for most professional uses.
Are my audio files uploaded to a server?
No. All compression runs locally in your browser using JavaScript, so your audio never leaves your device. Sensitive recordings stay private, and there are no upload or download delays. Once the page has loaded, compression even works without an internet connection.
How long does it take to compress an audio file?
A typical 5-minute song compresses in about 5-15 seconds on a modern computer since the processing is done locally. Large files such as 50MB WAV recordings may take up to a minute. Multi-pass encoding adds a few seconds but guarantees that you hit the exact size.
What is the smallest target size supported?
You can enter any custom target, even 100KB. Do keep in mind that 100KB allows under 5 kbps for a 3-minute track, which is unusable, so practical minimums are around 500KB for short 30-60 second voice clips such as WhatsApp voice notes, and 1MB for full songs.
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Learn more about this tool
About Audio Target-Size Compression
Need your audio files under a specific size limit? This tool uses multi-pass bitrate optimization to compress audio to your exact target size. Supports MP3, WAV, OGG, AAC, M4A and more. All processing happens in your browser — your files never leave your device. Whether you are prepping images for WhatsApp status, shrinking PDFs for UPI and government portal submissions, or optimizing media for mobile-first users on Jio and Airtel networks, this tool keeps your files light and shareable across India — with zero upload.
References & Resources
Authoritative specifications and references for the file formats this tool works with.