Trim Audio Online Free

Frequently asked questions

How do I trim audio online?

Upload your audio (MP3, WAV, AAC, OGG, or M4A). The tool shows the total duration. Enter start and end time in seconds. Click "Trim audio". FFmpeg.wasm cuts the segment in your browser using -c copy (no re-encoding). Download the result.

Are my files sent to a server?

No. Trimming runs entirely in your browser using FFmpeg.wasm. Your audio never leaves your device.

What formats are supported?

MP3, WAV, AAC, OGG, and M4A. The output keeps the same format as the input. Trimming uses -c copy, so no re-encoding and no quality loss.

Why does FFmpeg take a few seconds to load?

FFmpeg.wasm is a large WebAssembly module. It is downloaded once and cached. The first time you use the tool you will see a short loading state.

Can I set start and end in minutes?

The inputs are in seconds. For 1:30 enter 90 as the end time. You can use whole numbers; for sample-accurate cuts use a desktop editor.

Does it work on mobile?

Yes, in browsers that support WebAssembly (Chrome, Safari). Trimming with copy mode is fast on mobile.

Is there a maximum audio length?

There is no fixed limit. Very long files may take longer to load and process. Limits depend on your device memory.

Why is the cut not exactly at the times I set?

With -c copy, cuts happen at the nearest keyframe or frame boundary. For sample-accurate trimming you would need to re-encode (slower). This tool prioritizes speed and no quality loss.

Can I trim multiple segments?

This tool produces one continuous segment (start to end). For multiple segments use a desktop audio editor.

Does it work in all browsers?

FFmpeg.wasm requires a modern browser with WebAssembly. Chrome, Firefox, Safari, and Edge (recent versions) work.