This runs in your browser. Nothing is uploaded. Longer clips take longer here than they would on a fast server — that is the trade-off for not sending the file.
About Split audio
Cuts a recording into N equal parts in the browser and zips the MP3s. Nothing is uploaded.
Equal slices for a podcast you want in chunks, not a DAW session. 2–8 parts. Markers at arbitrary times are trim, twice. Output is MP3 in a zip so you are not clicking download for every slice.
Split audio runs FFmpeg compiled to WebAssembly in this tab. The first visit of a video or audio tool fetches about 30 MB from this origin; after that it can stay cached. Your file is not in that download and is not POSTed anywhere. GPL FFmpeg, single-thread, same origin, no COEP experiment. That is the same encoder as convert, trim, and compress — this page is just a different argument list, with the same honesty about what the core cannot mux.
You can open the network panel and watch. Encoding a long clip on a phone is slow because it is your CPU. That wait is the trade for not handing the file to a converter you found in a search ad. Reverse and boomerang cap duration so a two-hour file does not try to live backwards in RAM. If a codec inside a familiar extension is missing from this core, you get an error rather than a silent broken file. Subtitle generation and stem splitting are not here; I will not pretend they are. Missing is better than a watermarked demo.
How to use Split audio
- 1Drop audio.
- 2Set parts.
- 3Click Split and download the zip.
What it won't do
- Equal parts only.
- Re-encodes to MP3.
- Arbitrary cue points are trim.
Common questions
Does split audio upload the file?
No.
Can I split at silence instead?
Remove silence first if you want gaps gone, then split. This tool does not detect sentences.
What format are the parts?
MP3. Same as most of the audio tools on this site.
Related tools
Why this one doesn't upload your file
There is no server to upload to. This page is a static file, and the work happens in your browser using the same graphics and WebAssembly code that renders every other site you visit. Your file is read from disk into memory, processed, and handed back as a download. Once the page has loaded you can disconnect from the network entirely and it keeps working. The longer explanation