Audio Cutter
Trim audio files — right in your browser.
Audio Cutter is a zero-dependency browser tool built with vanilla JavaScript and the Web Audio API. Drag and drop any audio file, set the start and end timestamps, adjust volume, and export a trimmed MP3 — all without sending a single byte to a server. Everything runs on the client using byte-level slicing for accurate cuts.
Key Features
Drag & Drop Upload
Drop any audio file directly onto the page or use the file picker. Supports all common audio formats.
Precise Time Controls
Set start and end times in seconds to cut audio at exactly the right point. Duration is detected automatically.
Playback Preview
Play/pause the loaded audio with a volume slider before committing to the cut.
Client-Side Only
No file uploads, no server processing. All audio handling is done locally via the Web Audio API.
MP3 Export
Export the trimmed audio with a custom filename. Uses byte-level slicing for accurate, fast exports.
Dark Mode Support
Automatically adapts to your system color scheme preference via prefers-color-scheme.