About Audio Editor

Trim, fade, amplify, change speed — all client-side. Part of the DevTools Surf developer suite. Browse more tools in the Audio collection.

Use Cases

• Trimming silence from the beginning and end of voice recordings
• Adding fade effects to music clips for presentation backgrounds
• Adjusting playback speed for lecture recordings or podcasts
• Amplifying quiet audio tracks without installing desktop software

Tips

• Use the waveform display to visually select trim points
• Apply fade-in and fade-out to avoid audio click artifacts
• Speed changes preserve pitch — tempo-only change, not chipmunk effect

Fun Facts

• The fade-in and fade-out effect dates back to radio broadcasting in the 1920s, where engineers would physically rotate a potentiometer to smoothly adjust volume.
• Audacity, the most popular free audio editor, was first released in 2000 by Dominic Mazzoni and Roger Dannenberg at Carnegie Mellon University.
• The Web Audio API, which enables browser-based audio editing, became a W3C Recommendation in June 2021 after 10 years of development.

FAQ

What operations are supported?

Trim (cut to a time range), fade-in/out, amplify (dB), speed change (tempo + pitch preserved), and normalize. Built on the Web Audio API.

Can I preview changes before exporting?

Yes — playback reflects pending edits in real time. Commit when you're happy; discard and tweak otherwise.

What output formats?

Same as Audio Converter — WAV, MP3, Opus, AAC. WAV is recommended for further editing; MP3/Opus for web delivery.