Trim Audio Online Free
Cut your audio files to the exact length you need. Visual waveform display with precise time controls.
Drop your audio file here
or click to browse
Audio Clipper Features
Precise audio trimming with visual feedback.
Editing Features
See your audio as a waveform to find the exact point to cut.
Set exact start and end points down to the millisecond for perfect cuts.
Play and loop your selected clip before exporting to review the result.
Format Support
Support for MP3, WAV, OGG, AAC, FLAC, M4A, and WebM audio formats.
Export your trimmed audio as WAV or WebM format.
Browser-side workflows run locally and avoid server upload when that mode is used.
Key Takeaways
- Audio trimming uses the Web Audio API in the browser when the file, browser, and device support it.
- You can load MP3, WAV, OGG, FLAC, AAC, or M4A files and export the trimmed clip as either WAV (lossless PCM, plays everywhere) or WebM (smaller, compressed).
- Choose WAV when you plan to edit the clip further or need maximum compatibility, and pick WebM only when a smaller file matters for sharing or web playback; WebM relies on the MediaRecorder API and fails in older browsers like older Safari, where WAV is the reliable fallback.
- Because the whole file is decoded into memory, very long recordings use more RAM and run slower, so trim large files in smaller sections and make sure the end handle sits after the start handle or the Trim button will report an error.
How to Trim Audio in Your Browser
Load your audio file
Drop an MP3, WAV, OGG, FLAC, AAC, or M4A file onto the upload area, or click to browse. The file is decoded locally with the Web Audio API and stays on your device, then drawn as a waveform so you can see where sounds start and stop.
Set the start and end points
Drag the start handle and the end handle along the waveform to frame the section you want to keep. The dimmed areas show what gets removed, and the live duration readout updates as you move each handle. Click anywhere on the timeline to move the playhead and check a position.
Preview, then trim and download
Press Play to hear only the selected region, and enable Loop to repeat it while you fine-tune the handles. When the clip sounds right, choose WAV or WebM as the output format, click Trim Audio, and download the result. The cut is computed in your browser from the decoded samples.
WAV vs WebM Output
This clipper can export your trimmed selection in two formats. WAV is produced by a built-in 16-bit PCM encoder and works everywhere, while WebM is recorded through the browser MediaRecorder API and is more compact. Use this table to pick the right one for your clip.
| Aspect | WAV | WebM |
|---|---|---|
| Compression | Uncompressed PCM (lossless) | Compressed audio |
| File size | Larger | Smaller |
| Quality | Matches the decoded source samples | Good quality at a smaller size |
| How it is made | Pure JavaScript encoder in your browser | MediaRecorder API in your browser |
| Browser support | Works in all modern browsers | Needs MediaRecorder (limited in older Safari) |
| Best for | Editing, archiving, importing into audio software | Sharing and web playback where size matters |
Which Output Should You Choose?
Editing a clip further
Pick WAV. The lossless PCM output imports cleanly into editors and other converters without stacking extra compression on top of your source audio.
Sharing or attaching
Pick WebM when a smaller file matters, such as sending a clip in chat or embedding it on a page that plays back in the browser.
Maximum compatibility
Choose WAV if you are unsure where the file will be opened. It plays in virtually every audio app and does not depend on MediaRecorder being available.
Older Safari or no MediaRecorder
Use WAV. If your browser cannot record WebM, the tool will report that WebM is unsupported, so WAV is the reliable fallback.
Common Problems and Fixes
The file will not load or decode
Confirm the file is one of the supported types: MP3, WAV, OGG, FLAC, AAC, or M4A. If decoding fails, the audio may be corrupt or use a codec your browser cannot decode. Try re-exporting the source or converting it to WAV first.
WebM output fails
WebM is created with the browser MediaRecorder API, which is missing in some older browsers such as older Safari. If you see a WebM not supported message, switch the output format to WAV and trim again.
Trim button reports an error
The end point must come after the start point. If you see a message about the end time, drag the handles so the selected region has length, then press Trim Audio again.
Long files feel slow or run out of memory
The whole file is decoded into memory in your browser, so very long recordings use more RAM and take longer. Close other heavy tabs, or split the work by trimming a large file into smaller sections one at a time.
How to Trim Audio Online
Upload your audio file, set the start and end times using the waveform or time inputs, then click Trim Audio to download your clip.
Frequently Asked Questions
How is my audio processed?
Trimming can run in your browser using the Web Audio API when supported.
For sensitive audio, confirm the browser-side workflow before processing.
What audio formats can I upload?
MP3, WAV, OGG, FLAC, AAC, and M4A are supported for upload.
Output is available as WAV or WebM.
How do I set the trim points?
Play the audio and click Set Start to Current or Set End to Current at the right moment.
Or type exact times directly into the MM:SS.ms input fields.
What is the output format?
WAV is lossless and compatible with all audio software.
WebM is a compressed format, smaller but widely supported in browsers.
Is there a length limit on the audio?
Practical limits depend on file length, format, browser support, and device memory.
Very long files may use more memory or require a different workflow.
Can I preview the trimmed section?
Yes. Use the playback controls to listen to any part of the audio before trimming.
The loop option lets you repeat the selected section.
Is this tool free?
Yes, completely free with no registration.
Practical processing limits can apply by file size and workflow.
What browsers are supported?
Chrome, Firefox, Safari, and Edge are all supported.
WebM output requires MediaRecorder support (not available in older Safari).
Does trimming reduce audio quality?
WAV output is lossless with no quality reduction.
WebM applies compression but maintains good quality at small file sizes.
Can I zoom the waveform?
Yes. Use the zoom slider to zoom in on the waveform for more precise editing.
This is useful for trimming at exact millisecond positions.
Sources and References
Format and tool details on this page are based on the official specifications and documentation below.
- Web audio container/codec guide- MDN Web Docs
- FFmpeg documentation