A free audio cutter,
entirely in your browser

▶ Demo — load · select · cut

The walkthrough below replays the real flow: load audio → drag a region on the waveform → preview → cut & download, automatically.

Actual screen

The waveform and playback controls sit on the left; file info (name, duration, sample rate, channels), the selection (start, end, length) and output info on the right. Drag the handles or type exact times to set the region.

Why I built it — no upload, no bloat

To grab just one phrase of a song, one part of a lecture, or one segment of a recording without wondering "where do I upload this?" Typical online editors send your file to a server; this tool keeps decoding, cutting and saving entirely in the browser — recordings and sensitive audio never leave your machine.

It is a single HTML file that uses no external libraries, so there is no install, signup or payment, and it works offline.

Who it's for

• Content creators — quickly extract the segment you need for a video or podcast
• Ringtones & alarms — cut one phrase from a favorite track
• Lecture & recording cleanup — keep only the key part of a long recording
• Privacy-conscious users — when you want local-only processing with no upload

How to use

Step 1 — Load a file

Drag an audio file onto the dashed area, or click to pick one. MP3 · WAV · M4A · OGG · FLAC and anything else your browser can decode are supported. Once loaded, the waveform plus file name, duration, sample rate and channels appear.

Step 2 — Select a region

• Drag the handles — pull the vertical handles on each side of the waveform to set start/end
• Draw a new region — press and drag on an empty part of the waveform to define a new selection
• Type exact times in the start/end fields (e.g. 1:23.500 or 83.5)

Step 3 — Preview

Use Play selection to hear just the chosen region before cutting. Click the waveform to move the playhead, and use the To playhead buttons to set the current position as start or end — great for cutting precisely while you listen.

Step 4 — Cut & save

Press Cut & download and the selection is saved as name_cut.wav. The output is a lossless 16-bit PCM WAV that keeps the original sample rate and channels.

Key features

FAQ

Q. Are my audio files uploaded to a server?

No. Decoding, cutting and saving all happen inside your browser. It works offline, and your files are never sent over the network.

Q. Why WAV instead of MP3?

Browsers ship no built-in MP3 encoder, and this tool uses no external libraries. So it exports lossless WAV with zero dependencies. If you need MP3, convert the saved WAV afterward.

Q. Which formats can I load?

Anything your browser can decode (typically MP3 · WAV · M4A · OGG · FLAC). If decoding fails, an on-screen message explains it.

Q. Can it fade or adjust volume?

This version focuses on cutting only — doing the one core action flawlessly.

Q. Can I cut multiple regions at once?

One region at a time for now. You can export several times, changing the selection between exports.

✂️ Free · Open source · No ads

"Load audio, cut out the region you want, download it." Doing that one thing as fast and safely as possible is the goal. Try it now — with zero upload worries.

Source & issues: github.com/cflab2017/Tool_web_mp3_cutter