Free Online Audio Compressor
Shrink MP3, WAV, M4A and other audio files by up to 90% with simple quality presets. Everything is processed locally in your browser — no upload, no watermark, no signup.
Features
Smaller Audio Files, Clear Sound
Re-encoding at a lower bitrate strips the bytes your ears barely notice — you pick the balance between size and fidelity.
Up to 90% Smaller
Uncompressed WAV recordings shrink to a fraction of their size; bulky MP3s and M4As slim down too.
Four Quality Presets
From near-transparent High Quality down to Tiny for voice memos — see the final size before you download.
Mono Mode for Voice
Lectures, meetings, and voice memos don't need stereo. One checkbox halves the size again.
Private, Free, and Ready for What's Next
Everything is processed locally in your browser tab — and when the file is small enough, BibiGPT can take it further.
Never Leaves Your Device
Your recording is read, compressed, and saved back entirely on your own machine — zero server upload.
No Watermark, No Signup
The compressed MP3 is clean and yours. Use it anywhere — email, chat apps, cloud storage, course platforms.
Or Skip Compression with BibiGPT
Shrinking a lecture, meeting, or podcast recording just to get a transcript? BibiGPT transcribes and summarizes long recordings directly — no compression needed.
Loved by creators, students & researchers
Why people use BibiGPT to turn videos into text every day.
Trusted by 50,000+ users worldwide
“I paste a link and get clean captions in seconds — it saves me hours of retyping every single week.”
Maya R.
Content Creator · Repurposes short videos
“Exporting the transcript lets me review new words at my own pace instead of pausing the video constantly.”
Daniel K.
Language Learner · Studies with real videos
“Accurate, timestamped text I can quote directly. It has quietly become part of my daily workflow.”
Priya S.
Researcher · Cites public talks
FAQ'S
Frequently Asked Questions
Ask us anything!
Shrink Your Audio Now — or Let AI Do More
Drop a file and get a smaller MP3 back in seconds — no signup, no watermark. And if you're compressing a lecture, meeting, or podcast recording just to transcribe it, BibiGPT turns the original into AI transcripts and summaries directly — no shrinking required.