Free Audio Trimmer — Cut & Split Audio Files
Trim audio to a time range or split into segments — a free alternative to Adobe Audition. No sign-up, no re-encoding.
Instant Cuts
Uses stream copy — no re-encoding means near-instant trimming with zero quality loss. Cut a 2-hour audiobook in seconds.
Trim or Split
Trim mode extracts a single segment. Split mode cuts at multiple time markers, producing separate files for each part.
Flexible Time Input
Enter time as seconds (90), MM:SS (1:30), or HH:MM:SS (1:02:30). Decimal seconds supported for precise cuts.
100% Private
All processing happens in your browser using WebAssembly. Your files never leave your device.
Free Audio Trimmer — Cut & Split Audio Files Online
The Free Audio Trimmer lets you trim audio files to a specific time range or split them into multiple segments at custom time markers — all directly in your browser. No sign-up, no uploads, no file size limits. Powered by ffmpeg.wasm with stream copy mode for instant cuts and zero quality loss.
Features
- Instant stream copy — Uses ffmpeg's
-c copymode. No re-encoding means near-instant processing and zero quality loss, even for long files. - Trim mode — Extract a single segment by entering a start and end time. Perfect for grabbing a clip from a podcast or cutting silence from a recording.
- Split mode — Add multiple time markers and split the file into separate segments. Great for breaking audiobooks into chapters or splitting a DJ mix into individual tracks.
- Flexible time input — Enter time as seconds (90), MM:SS (1:30), or HH:MM:SS (1:02:30). Decimal seconds supported for precision.
- Audio preview — Listen to the file before trimming to verify your time markers are correct.
- 100% client-side — Uses ffmpeg.wasm (WebAssembly). Your files never leave your device.
How to Trim Audio
- 1. Add a file — Drag and drop an audio file into the upload area, or click to browse. MP3, M4A, WAV, OGG, FLAC, AAC, and WebM are supported.
- 2. Choose mode — Click Trim to extract a single segment, or Split to cut at multiple markers.
- 3. Enter times — For Trim mode, set the start and end time. For Split mode, add one or more time markers where you want to cut.
- 4. Process — Click the action button. Stream copy mode makes this nearly instant regardless of file length.
- 5. Download — Download your trimmed clip or all split segments.
Audio Trimmer vs. Audio Editor
| Feature | Audio Trimmer | Audio Editor |
|---|---|---|
| Purpose | Quick, precise cuts by timestamp | Full waveform editing with effects |
| Speed | Near-instant (stream copy, no re-encoding) | Depends on file length (re-encodes) |
| Split support | Yes — multiple markers, separate files | No — single track editing |
| Effects | None (cut only) | Gain, fade, normalize, reverse, speed |
| Waveform | No | Yes — visual selection |
| Quality | Lossless (exact copy) | Re-encoded output |
Frequently Asked Questions
Why is trimming so fast?
The trimmer uses ffmpeg's stream copy mode (-c copy), which copies the audio data without decoding or re-encoding it. This means a 2-hour audiobook can be trimmed in under a second. The only processing is reading/writing the container format.
Are the cuts frame-accurate?
Stream copy mode cuts at the nearest keyframe, which may be slightly before your requested timestamp (typically within a few milliseconds). For compressed formats like MP3, this is usually imperceptible. For frame-exact cuts, you would need re-encoding, which our Audio Editor supports.
Can I split an audiobook into chapters?
Yes. Switch to Split mode and enter the timestamp for each chapter break. The tool will produce one file per chapter, numbered sequentially (e.g. book-part001.mp3, book-part002.mp3, etc.). Use Download All to grab them all at once.
What happens to metadata and tags?
Stream copy preserves most metadata from the original file (title, artist, album, etc.) in each output segment. However, chapter markers in the original file are not automatically adjusted for new segment boundaries.