How to trim audio online
Load a local audio file, set Start and End on the waveform, and download the selected section. Preview the range first. Fast (recommended) uses stream copying when supported, while Precise re-encodes the file so the cut lands on your selection. The page reads and processes the audio in your browser and does not send it to a server.
- Drop an audio file here, or click browse files.
- Drag the start and end handles on the waveform to mark the section to keep.
- Click Preview selection and listen to the selected range.
- Choose Fast (recommended) for stream copying when supported, or Precise to re-encode and place the cut on your selection.
- Let trimming start automatically. Click Apply to run it again, then click Download trimmed audio.
Set the start and end of an audio file
Once the file loads, two handles appear on the waveform. Move the first handle to set Start and the second to set End. Original length and Trimmed length update as you move them. Click elsewhere on the waveform to move the audio preview, then use Preview selection to play the range from Start to End.
Focus a handle and press Left Arrow or Right Arrow to adjust it. Home moves that handle to the beginning, and End moves it toward the file end. The other handle and the required gap can stop a handle before it reaches the boundary.
podcast.mp3
Start: 0:10.000
End: 1:20.000
Trimmed length: 1:10.000Choose Fast or Precise audio trimming
Fast (recommended) runs a stream-copy trim, so the audio is not re-encoded when that operation succeeds. The cut can land away from the exact selected time. If Fast produces no output, the page retries with re-encoding.
Precise re-encodes so the cut lands exactly on your selection. Recognized extensions use the encoder settings defined in the page code. Unknown extensions use a default high-quality setting, so the original bitrate and encoding details can change.
What happens when the waveform is unavailable
- The browser reads and decodes the file first. If decoding fails, the audio player can still provide the duration, so trimming can continue without a waveform preview.
- The page loads an audio engine of about 30 MB when processing starts. The selected audio stays in the browser.
- The page code has no hard maximum file size. Large files are read and decoded in memory, so processing can fail or use more memory than the device has available.
- The upload area names MP3, WAV, FLAC, AAC, OGG, and more. That list is not a complete format guarantee.
Where audio trimming comes up
A podcast editor can keep the 00:10 to 01:20 section of podcast.mp3, preview the cut, and download the result as a separate trimmed file.
Someone preparing a voice recording can remove an opening pause or a trailing section by moving the two handles and checking Trimmed length before downloading.
When to use another audio edit tool
Audio Edit Tools covers direct changes to audio files in the browser. Use Audio Cleaner to reduce steady background noise, mains hum, hiss, or room echo. Use Audio Effects Editor for pitch, tempo or speed changes, fades, reverse, or effects on a selected range. Use Audio Tag Editor when you need to edit metadata such as title, artist, album, or artwork while keeping the audio bytes unchanged.
Frequently asked questions
Can I trim an MP3 online?
Yes, MP3 is one of the formats named in the upload area, alongside WAV, FLAC, AAC, OGG, and more. The downloaded name keeps the file extension. Fast or Precise determines how the audio is processed.
How do I cut a specific section from an audio file?
Drag the two waveform handles until the Start and End values cover the section you need. Click Preview selection to listen to that range before the page produces the trimmed result.
Should I use Fast or Precise for an exact audio cut?
Use Precise when the cut must land exactly on your selection. Fast (recommended) tries stream copying first and falls back to re-encoding when that operation fails.
Does trimming audio upload my file?
The selected audio is read, decoded, and trimmed in the browser. The page does not send the file to a server. The browser does download the audio engine when processing starts.