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.
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Compress Your Audio
Upload an audio file, pick a quality preset, and download a smaller MP3.
Drop your audio here
or click to browse files
Supports MP3, WAV, M4A, AAC, OGG, FLAC, WMA
Done editing? Let AI do the reading
Your file is ready — now turn it into something you can search, quote, and share in one click.
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!
Popular guides
1 Bilibili AI Video Summary Tool: BibiGPT Summarizes 30+ Platforms Instantly (2026)
Best Bilibili AI video summary tool 2026? Paste a link for a free AI recap, mind map, and transcript-style takeaways on 30+ platforms — no login needed.
2 How to Install Skills in DeepSeek Harness: A Hands-On Guide to Teaching dsh to Watch Videos
Install a video-summary skill into DeepSeek Harness in one copy-paste — SKILL.md matches Claude Code. Or skip dsh: paste a Bilibili or YouTube link in the browser and get a timestamped summary.
3 How to Reverse a Video Without an App — Free, In-Browser, No Download (2026)
Reverse any video free with no app and no download, right in your browser. Step-by-step for iPhone, Android, and PC, plus how to reverse audio (2026).
Need more than 1 compression a day?
Sign up free to lift the daily limit — and turn any video or podcast into an AI summary, transcript, or mind map in seconds.