17 tools
Audio tools, nothing uploaded.
Cut, shrink and join audio without uploading a single second of it.
Trim audioCut the part you want out of a recording, in your browser.
Compress audioGet a recording under a size limit without sending it anywhere.
Merge audio filesCombine several recordings into one track, in order.
Extract audio from a videoPull the soundtrack out of a clip and save it on its own.
Change audio speedSpeed a recording up or slow it down without turning voices into chipmunks.
Change audio volumeMake a recording louder, quieter, or consistent throughout.
Fade audio in and outRemove the abrupt start and end of a cut clip.
Change audio pitchMake a voice deeper or higher without changing how fast it plays.
Remove silence from audioCut the dead air off a recording, or tighten the gaps throughout.
Remove background noiseReduce steady hiss, hum and fan noise from a recording.
Remove vocals from a songCancel the centre of a stereo mix to get a rough backing track.
Split an audio fileCut a long recording into parts you can actually send.
Edit MP3 tagsFix the title, artist and album a music player shows.
Transcribe audio or videoTurn speech into text or subtitles, on your own device. It is slow — genuinely.
Reverse audioPlay a track backwards. The file never leaves your device.
BPM counterWork out a track's tempo from the beat in the bass, on your device.
Text to speechTurn writing into a spoken audio file you can download. Slow, and it runs on your device.
About these tools
Audio files carry interviews, voice notes, lectures and recordings people would rather not hand to a stranger's server. These run ffmpeg compiled to WebAssembly inside this page, so the sound never leaves your device — at the cost of your own machine doing the encoding.
Guides
FAQ
Audio tools — questions
Are these audio tools free?
Yes — every tool here is free, with no account, no quota and no watermark.
Are my files or text uploaded?
No. Every tool on this page runs inside your own browser. Nothing is transmitted to us or to anyone else.
Do I need to install anything?
No. Everything runs in the page using your browser's own capabilities.