What audio formats are supported?

MP3, WAV, OGG, FLAC, AAC, and M4A formats are supported.

Is the audio quality preserved?

Yes — we use stream copy mode which avoids re-encoding, so the audio quality is identical to the original.

Does trimming WAV or FLAC lose any quality?

No. WAV and FLAC trims happen at the sample level with no re-encoding, so the cut segment is bit-for-bit identical to the source. Lossless in, lossless out — ideal when the clip will be edited further.

Can I trim an MP3 without re-encoding it?

Yes, MP3 can be stream-copied so the kept section is not re-compressed and no extra quality is lost. The trade-off is that cuts land on MP3 frame boundaries rather than the exact millisecond; choose re-encode if you need sample-precise edits.

How do I remove silence from the start of a clip?

Use the waveform view to spot the flat silent region, drag the start handle to where the audio actually begins, and export. The waveform peaks and gaps make it easy to trim dead air without listening through the whole file.

Is there a length limit on the audio I can trim?

There is no hard cap, but the file is decoded into your browser's memory, so very long recordings are limited by available RAM. Hour-long lossless WAVs use far more memory than a short MP3, and large files process more slowly on phones.

Can I keep both halves when I cut a file?

The trimmer exports the selected region. To split a recording in two, trim and export the first section, then come back and trim the second — the original file is never modified, so you can run it as many times as you need.

Audio Trimmer — Cut Audio Files Online Free

How to use Audio Trimmer

The Audio Trimmer lets you cut any section from an MP3, WAV, FLAC, OGG or AAC audio file by specifying precise start and end times, then exports the clipped segment — all in the browser with no uploads. Perfect for isolating a song chorus, removing silence from a podcast intro, clipping a sound effect or extracting a quote from a long recording.

Click "Select Audio" and open your audio file (MP3, WAV, FLAC, OGG or AAC).
Use the waveform timeline to visually locate the region you want to keep.
Drag the handles or type timestamps to set the exact start and end of the trim.
Play back the selected region to confirm it sounds correct.
Click Trim and download the exported audio clip.

Your data never leaves your device — 100% private processing.

Waveform-based vs timestamp trimming

Waveform-based trimming lets you see the audio visually — peaks represent loud sounds while flat areas indicate silence — making it easy to find the exact position of a beat, word or sound effect without listening to the entire file. Timestamp trimming is faster when you already know the exact time codes from a transcript or video editor. Both methods produce the same output; use whichever is more convenient for your workflow.

Preserving audio quality when trimming

For lossless formats (WAV, FLAC), trimming can be performed as a pure sample cut with no quality loss. For lossy formats (MP3, AAC, OGG), the tool performs a stream-copy trim that avoids re-encoding, preserving the original quality. Frame-accurate trimming of MP3 files requires re-encoding because MP3 uses fixed-length frames of approximately 26 ms each; stream copy is accurate only to the nearest MP3 frame boundary. If exact-to-the-millisecond accuracy is required for a lossy file, choose the re-encode option.

Worked examples

Clip a chorus

Inputs: 3:45 song, trim 0:30–1:00

Result: 0:30 clip

Trim a podcast intro

Inputs: 60:00 episode, keep 0:15–59:30

Result: 59:15 audio

Glossary

Waveform: A visual representation of an audio signal that shows amplitude (loudness) over time, used to locate sounds quickly.
PCM: Pulse-Code Modulation; the uncompressed digital audio format used in WAV files, where each sample represents an instantaneous audio amplitude.
MP3 frame: The smallest independently decodable unit of an MP3 stream, lasting approximately 26 milliseconds and limiting frame-accurate stream-copy cuts.
Fade in / fade out: A gradual increase or decrease of audio volume at the beginning or end of a clip, used to avoid abrupt starts and stops.
Sample: A single numeric measurement of audio amplitude at one instant in time; audio quality is determined by how many samples exist per second and how many bits each sample uses.

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Audio Trimmer

How to use Audio Trimmer

Waveform-based vs timestamp trimming

Preserving audio quality when trimming

Worked examples

Glossary

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Frequently Asked Questions

Why use Audio Trimmer?

Common use cases

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