AUDIO TOOLS
Audio processing, done locally, no upload.
Cut clips, merge audio, adjust volume and fade in/out — powered by WebAssembly, processed locally; the engine (~30MB) loads once on first use.
Cut by start/end time; stream-copy for instant export or re-encode.
Drop or choose audio
MP3 / WAV / M4A / OGG and more; multi-select to merge
Merge the selected audio files in order (at least 2), re-encoded to the output format.
Adjust overall gain and fade in/out; negative lowers volume, positive boosts it.
Format conversion has moved to its own dedicated tool with 7 formats plus sample rate, channels and loudness normalisation.
Change playback speed (without pitch shift), or shift pitch up/down; both can be combined.
Record via the browser microphone (fully local, no upload); preview, download, or convert to MP3.
结果会显示在这里
Everything runs locally in your browser
What can this tool do?
It brings ffmpeg into your browser (WebAssembly) so you can cut audio clips, merge multiple tracks, or adjust volume and fade — all locally, no uploads.
FAQ
Why load an engine?
Audio processing relies on ffmpeg, which runs as WebAssembly in the browser; ~30MB downloads on first use and is then cached.
Are my files uploaded?
No. Transcoding happens entirely in your browser.
What if it is slow?
Browser transcoding is slower than native apps; try short clips first and be patient with large files.