Free Online Tool
Audio Cutter
Choose an audio file, enter the start and end times, and cut only the section you need. FLAC output saves the selected section without lossy compression. This tool does not process external URLs.
Selected audio files are not uploaded to a server and are processed only in your browser.
Only use audio files that you own or have the right to edit. Do not edit or distribute copyrighted files without permission.
Trim range
Waveform selection
Drag the left and right handles to choose the start and end points. Drag the selected area to move the whole section.
Total length: -
Choose an audio file to see the selected range.
The default is to save in the original format. You can manually choose WAV, MP3, OGG, or FLAC. MP3, OGG, and FLAC output load ffmpeg.wasm in the browser for encoding.
Original Preview
Preview Selected Range
Choose an audio file to see details.
The result will appear here.
Selected audio files are not uploaded to a server and are processed only in your browser.
Useful Cases
- Save only the needed part of a long recording
- Remove silence before or after a sound effect
- Create a short sample or ringtone source
Selecting Time Ranges
Use the waveform for a rough range and time inputs for precise adjustment. Some output formats require re-encoding for accurate cutting.
How to Use
- Choose an audio file to trim.
- Enter the start and end times.
- Keep the default output format as the original format.
- Choose MP3, WAV, OGG, or FLAC if needed.
- Click the trim button.
- Download the trimmed audio file.
Examples
- Trim a FLAC recording without lossy compression
- Remove unnecessary silence from the beginning or end of a sound effect
- Create a short sample from a longer audio file
Calculation and Conversion Notes
Audio trimming works by decoding the selected audio file in the browser and extracting only the samples between the selected start and end times. The default output uses the original file format when possible. WAV is usually uncompressed and may be larger than the original file, while MP3, OGG, and FLAC output are encoded in the browser using ffmpeg.wasm. FLAC output saves the selected section without lossy compression. Selected files are not uploaded to a server and are processed only in your browser.
Quality and Format
Saving as MP3 or OGG can apply lossy compression again. If the source is lossless, consider WAV or FLAC when you want to avoid lossy output.
FAQ
Does trimming change audio quality?
Some output formats require re-encoding. MP3 or OGG output can apply lossy compression again.
Should I use the waveform or time inputs?
Use the waveform for quick selection and time inputs for precise adjustment.
Why are long files slow?
The browser needs to decode audio and encode the selected result, so longer and larger files take more time.
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