NoCloud Media

Audio tool

Audio Trimmer — Cut Start and End

Type a start and end time, trim your audio in the browser. Lossless — we don't re-encode.

How it works

  1. 1

    Drop your audio file

    MP3, WAV, OGG, M4A, AAC, or FLAC. Stays on your device.

  2. 2

    Enter start and end times

    Seconds (`45`) or timecode (`1:23`, `0:02:45.5`). End must be greater than start.

  3. 3

    Trim in your browser

    Stream-copy trim — no re-encoding, which means no quality loss and it runs in seconds.

  4. 4

    Download the trimmed audio

    Same format as the input, just shorter.

Why use Audio trimmer?

Lossless — stream-copy trimming preserves the source audio bit-for-bit inside the new cut range.

Fast — no re-encoding means even a full-length album rip trims in seconds.

Private — your audio never leaves your browser.

Common use cases

  • Cut silence from the start of a voice memo
  • Remove an ad break from a podcast episode download
  • Extract a 30-second snippet from a song for a ringtone
  • Trim the tail off a recording where someone stopped the tape late
  • Clip a quote out of an interview for transcription
  • Isolate a specific section of an audiobook chapter

About MP3 and MP3

Stream-copy trimming works by picking the audio packets between your start and end times and writing them back out with no decoding. That means zero quality loss and very fast processing — most of the work is just moving bytes. The tradeoff is that the actual cut points snap to the nearest packet boundary, which in MP3 is roughly 26 ms. That precision is below what anyone can hear, but if you need sample-accurate cuts for music production, a DAW will serve you better.

Frequently asked questions

Is my file uploaded to a server?
No. NoCloud Media trims your audio entirely in your browser using WebAssembly. Your file never leaves this tab.
Why is the output the same format as the input?
Stream-copy trimming doesn't re-encode, so the output must keep the same codec and container. If you want a different output format, trim first, then use the audio converter.
Will I lose any audio quality?
No. Stream-copy preserves the original samples exactly.
What time formats can I type?
Seconds (`12`, `12.5`), minutes:seconds (`1:30`), or hours:minutes:seconds (`0:02:15.5`).
What's the maximum file size?
It depends on your browser's available memory. Files up to 500MB trim smoothly; larger files generally also work on desktop browsers.
Which browsers are supported?
Chrome, Edge, Firefox, and Safari 15+. We require WebAssembly and SharedArrayBuffer, both standard in modern browsers.

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