✂️ Audio Trimmer
Cut the exact seconds you need from any audio file — preview the result and download — without the recording leaving your device.
Decoded, processed and encoded in your browser — recordings never touch a server.
How the audio trimmer works
The file is decoded to raw samples with the Web Audio API (the browser understands MP3, WAV, OGG, M4A/AAC and FLAC natively), the selected span is rendered sample-accurately, and the result is encoded as a standard 16-bit WAV. Output is WAV because browsers decode everything but only encode uncompressed reliably — it plays everywhere and re-encodes cleanly to MP3/AAC in any editor if you need small files.
Voice memos, meeting recordings, interview clips — audio people trim is very often audio of people. Local processing isn't a nicety for this category; it's the reason the tool exists. Everything happens in browser memory and works offline.
Frequently asked questions
What input formats work?
Whatever your browser can decode — MP3, WAV, OGG, M4A/AAC and usually FLAC. If the file loads and shows a duration, it's supported.
Why is the output WAV instead of MP3?
Browsers ship decoders for everything but no reliable MP3/AAC encoder. WAV is lossless and universally playable; converting it to MP3 later (in any editor or converter) costs nothing extra in quality versus encoding directly.
Why is the WAV file so much bigger than my MP3?
WAV is uncompressed: stereo at 44.1 kHz runs about 10 MB per minute regardless of content. Your 5 MB MP3 might become a 40 MB WAV of the same audio — that's the format, not a bug.
How precise is the cut?
Sample-accurate — the trim happens on the decoded waveform, so at 44.1 kHz the boundary lands within ~0.00002 seconds of what you set.
Is my recording uploaded?
No — decoding, trimming and encoding all run in your browser's memory. Disconnect from the internet and it works identically.