HeroTools / Media
Local · Private · Free

Audio Trimmer & Editor

Import a clip or record from your mic, then trim, fade, normalize, reverse and adjust the volume — all decoded and re-encoded right on your device. Export a clean WAV; nothing is uploaded.

Audio editing isn’t available here

Your browser doesn’t support the Web Audio API (AudioContext + decodeAudioData) needed to decode and edit audio. Try the latest Chrome, Edge, Firefox, or Safari.

Drop an audio file
or click to browse — MP3, WAV, OGG, M4A
or capture live 00:00
Files never leave your browser — audio is decoded and edited locally, even offline.
—
Selection: 0:00.000 → 0:00.000 Length: 0:00.000  ·  Total: 0:00.000

Edit

0.0 dB
Applied to the whole clip when you click Apply gain. 100% = unchanged.

Export

16-bit PCM WAV, encoded in your browser. Plays anywhere.

A real audio editor that never phones home

Most online audio trimmers upload your file to a server to cut it. HeroTools decodes your audio with the browser’s native Web Audio API, edits the raw samples in memory, and writes the WAV header itself — so your recording stays entirely on your device. Trim a region, fade the edges, normalize the loudness, reverse it, then download a crisp, library-free WAV.

About Audio Trimmer & Editor

Audio Trimmer & Editor is a free, private media tool that runs entirely in your web browser. Import or record audio, trim, fade & adjust volume on a waveform — export WAV. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for audio editor, trim audio, waveform, fade. Like every HeroTool by Digital Heroes, Audio Trimmer & Editor is 100% free with no limits.

How to use Audio Trimmer & Editor

  1. Open Audio Trimmer & Editor — it runs entirely in your browser, with no signup.
  2. Drag and drop your file (or click to browse) — it never leaves your device.
  3. Adjust the options to match exactly what you need.
  4. Copy or download your result — it is free, and your data stays on your device.

Frequently asked questions

Is Audio Trimmer & Editor free?

Yes — Audio Trimmer & Editor is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. Audio Trimmer & Editor runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does Audio Trimmer & Editor do?

Import or record audio, trim, fade & adjust volume on a waveform — export WAV.

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Screen RecorderRecord your screen (and mic) to a video file — locally.Voice RecorderRecord audio from your mic and download it.Text to SpeechTurn text into speech with your system voices.Video Trim & GIFTrim a video or turn it into a GIF — in your browser (one-time engine download).