Built For Upload Limits
Reduce Audio File Size (Free & Online)
Reduce audio file size in your browser so recordings are easier to upload, email, store, and share on mobile apps.
- Useful for upload forms, email, WhatsApp, and LMS portals
- Lower bitrate or switch format without installing software
- Private local processing with no upload step
Ready to Convert
Convert Files in Your Browser
Drop files, pick the output format, and convert locally without uploads or signup.
No signup
No upload wait
Batch ready
How to reduce audio file size
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1
Add the file that is too large
Use the browser converter for recordings, podcasts, or music files.
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2
Reduce bitrate or pick a smaller format
MP3 and AAC are usually the best first step for uploads.
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3
Download the smaller export
Use the lighter copy for forms, email, messages, or cloud upload.
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What reduces audio size fastest
- WAV or FLAC source: convert to MP3 or AAC.
- Speech recordings: use 64-96 kbps mono.
- General voice + music: use 128 kbps stereo.
- Already-compressed files: lower bitrate carefully and compare quality.
Good targets by situation
- Email attachments: MP3, 96 kbps mono for speech.
- Client portals and form uploads: MP3 or AAC, 96-128 kbps.
- Messaging apps: MP3, 64-96 kbps for quick previews.
- Music demos: MP3, 160-192 kbps stereo to keep enough detail.
Related tools
Related guides
Trying to get under an upload limit?
Use a smaller format, lower bitrate, or mono voice export to make the file upload faster and pass size checks.