This runs in your browser. Nothing is uploaded. Longer clips take longer here than they would on a fast server. That's 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're 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 isn't in that download and isn't POSTed anywhere. GPL FFmpeg, single-thread, same origin, no COEP experiment. That's the same encoder as convert, trim, and compress. This page is just a different argument list, with the same honesty about what the core can't mux.
You can open the network panel and watch. Encoding a long clip on a phone is slow because it's 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 doesn't 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 aren't here; I won't 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. The recording is cut into N equal parts in the tab and zipped as MP3s. Open the network panel if you want proof before you trust a random converter with a voice memo.
Can I split at silence instead?
Remove silence first if you want gaps gone, then split. This tool doesn't detect sentences or chapter marks. Arbitrary cue points are still trim, run twice, if you know the timestamps.
What format are the parts?
MP3. Same as most of the audio tools on this site. Cap is 2–8 parts so a phone tab doesn't encode a dozen copies of a long interview in one click.
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