Audio Cutter
Trim an MP3, WAV, OGG, M4A or FLAC file to a start/end window — instantly, in your browser. The in-browser engine downloads once (~30 MB) on first use and is cached for the rest of your session.
Quick answer: Trim an MP3, WAV, OGG, M4A or FLAC file to a start/end window — instantly, in your browser. The in-browser engine downloads once (~30 MB) on first use and is cached for the rest of your session.
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Frequently asked questions
- How do I trim an MP3 without losing quality?
- Pick "Same format (instant — no re-encode)" as the output. The original audio is copied byte-for-byte into the new file, so there's zero quality loss.
- Is my audio file uploaded?
- No. The cut runs entirely inside your browser using ffmpeg.wasm; nothing is sent to any server.
- What's the maximum file size?
- 200 MB. That's roughly a 3-hour MP3 at 128 kbps or a 20-minute WAV — well above what any single song or voice memo needs.
- What time formats does it accept?
- Bare seconds ("30"), m:ss ("1:15"), or h:mm:ss ("0:01:15"). End must be after start.
- Why is the start point slightly off when I use 'Same format'?
- Compressed audio formats only let you cut at keyframe boundaries, which can be hundreds of milliseconds apart. For frame-accurate trims, re-encode to MP3 or WAV.
- What formats can I cut?
- MP3, WAV, OGG (Vorbis/Opus), M4A (AAC), FLAC, AAC. The output matches your chosen mode.
- Does it preserve metadata (title, artist, album art)?
- ID3 tags survive in 'Same format' mode. Re-encoding to MP3 or WAV strips them, so you'd need to re-add tags with a tag editor afterwards.
- Can I cut multiple clips out of one file?
- Not yet — this tool produces one output per run. To extract several segments, run the cutter once per segment.
- Will it work with very long podcasts?
- Up to the 200 MB cap, yes. For files larger than that, use a desktop tool like Audacity or ffmpeg directly — they can stream from disk instead of loading the file into memory.
- Is the audio cutter free?
- Yes — completely free, no signup, no watermark.