MP3 Cutter
Cut an MP3 online: the waveform loads, you drag two handles, the clip is yours.
About this tool
A two-hour meeting recording where only three minutes matter, a podcast quote you want on its own, a ringtone to carve out of a song, a voice memo that opens with thirty seconds of pocket noise: to cut an MP3 or trim audio should take ten seconds, not an install. Drop the file and the waveform appears immediately — not a loading animation, the actual shape of your sound, bar by bar. You can see the silences, the breaths, the applause. Drag the left handle to the start of the passage, the right one to the end, click anywhere in the wave to drop the playhead, and listen before you commit. The length you have selected is shown large, down to a tenth of a second.
The file is never uploaded: the analysis runs on your browser's own audio decoder, and the cut on an ffmpeg engine downloaded once inside the tab. When the source is already an MP3 and you add no fade, the cut is a plain stream copy — no re-encoding, no quality loss, and a result that lands almost instantly. Otherwise the section is re-encoded cleanly at the bitrate you choose. WAV output takes a different path again: it is written straight from the decoded samples, so it is lossless, needs no engine at all, and is immediate. Fade in and fade out, tucked into the settings, soften the edges of the clip — handy when the cut falls in the middle of a word or a note.
Frequently asked questions
Is my file uploaded to a server?
No, never. The audio is decoded and cut inside your browser: nothing travels over the internet, there is no account to create and no file to delete afterwards. Only the cutting engine itself — a program, not your data — is fetched from a CDN the first time and then kept in cache. A confidential recording, an interview, a consultation: they stay on your machine.
Does cutting damage the sound quality?
Not in the most common case. If you start from an MP3 and leave the fades off, the section is copied as it stands: the original audio data is preserved bit for bit, with no recompression at all. Re-encoding only happens if you add a fade, change format, or start from something other than an MP3 — and then you pick the bitrate yourself, up to 320 kbps.
Which formats can I drop in?
MP3, WAV, OGG, M4A, AAC, FLAC and OPUS: anything your browser can decode. Output is either MP3, the format that plays everywhere, or lossless WAV, chosen in the collapsed settings. WAV files go through an in-house reader that preserves their original sample rate exactly rather than resampling them behind your back.
Is there a size or length limit?
The file has to stay under 100 MB. That limit is not commercial: decoding sound costs roughly 350 KB of memory per second of recording, and beyond that the browser tab runs dry. For a typical MP3, 100 MB is already several hours of audio. If your file is heavier than that, cut it in two passes instead.
Is it really free, with no sign-up?
Yes — the tool is free, needs no account and has no usage limit. Processing happens locally in your browser, so your data never leaves your device.