A private, free alternative to MP3Cut
Trim a song, cut a ringtone, split a long recording into parts or join several files into one. MP3 and M4A are cut without re-encoding, so the sound is exactly the same as before, and nothing is uploaded.
Free forever · Runs on your device · 0 bytes uploaded
How Fizzdoc works
- Your file stays on your deviceEvery tool runs inside your browser tab, and the page is blocked from sending files anywhere. You can check it in your browser’s Network tab.
- Free, with nothing attachedNo account, no daily limit, no watermark and no paid plan. Open source under Apache-2.0.
- Works anywhereAny modern browser on Windows, Mac, Linux, Android or iPhone, with nothing to install, in 16 languages.
MP3Cut is a trademark of its owner and is named only to say what this page is about. Fizzdoc is an independent project, not affiliated with or endorsed by MP3Cut.
Fizzdoc tools for the jobs people use MP3Cut for
Each one works in your browser, free, without uploading anything.
- Cut & Split AudioTrim an MP3 or M4A, or cut it into parts. Listen before you save.
- Merge AudioJoin MP3 or M4A files into one, in the order you choose.
- Audio to TextTurn speech in an audio or video file into text or subtitles.
- MP3 to TextTranscribe an MP3 recording into text.
- Video to TextTranscribe the speech in an MP4 or WebM video into text.
- Subtitle GeneratorCreate SRT or VTT subtitles from a video or audio file.
Private by design — and you can check
Your files are never uploaded, because there is nowhere to upload them to.
- No upload step existsFiles are read and written inside this browser tab. There is no server that could receive them.
- The browser enforces itThis page’s Content Security Policy only allows connections back to this site, which serves nothing but the app itself.
- See for yourselfOpen developer tools, watch the Network tab and run a job: no request carries your document.
- Open sourceEvery line is on GitHub, built on qpdf, pdf.js & pdf-lib.
Frequently asked questions
How can Fizzdoc work without uploading my file?
Every tool runs inside your browser tab, using engines compiled to WebAssembly. Your file is read from your device, processed there and saved back to it. The page is only allowed to talk to fizzdoc.com, which serves nothing but the website itself, and you can watch your browser’s Network tab to see that no file leaves.
Which audio files work?
MP3 and M4A, including iPhone voice memos and most music files. They are cut between the file’s own audio frames without re-encoding, so the result sounds exactly like the original. WAV, OPUS and others are planned.
Is Fizzdoc made by MP3Cut?
No. Fizzdoc is an independent, open-source project and is not affiliated with or endorsed by MP3Cut. MP3Cut is a trademark of its owner and is named only to say what this page is about.
More comparisons
iLovePDF alternative · Smallpdf alternative · Sejda alternative · CloudConvert alternative · TinyPNG alternative · remove.bg alternative · Pixelcut alternative · Photoroom alternative · iLoveIMG alternative · PDF24 alternative · Adobe Acrobat online alternative · All comparisons