AudioAdjustable qualityRuns in your browser

Trim Audio

Cut audio down to the section between two timestamps. Some detail is discarded to fit the target format; how much depends on the format and your settings.

Not uploaded to any serverConverted on this deviceGone when you close the tabHow this works

Drop your files here

MP3, WAV, FLAC, AAC and 4 more formats · up to 300 MB each

or paste files from your clipboard

Ready when you are

Cut audio down to the section between two timestamps. Everything happens in this tab; nothing is sent anywhere.

⌘K to search converters

How to use it

1
Add your files
Trim Audio works with MP3, WAV, FLAC, AAC, M4A, OGG, Opus and AIFF. Drop them in, browse for them, or paste from your clipboard.
2
Choose your options
Tune bitrate, sample rate and channels and start and end times — or leave the defaults, which are sensible.
3
Run it and download
Press the button and save the result. Everything happens on your device, and nothing is uploaded.

Privacy, in plain words

Is it safe? Your audio file is not uploaded anywhere

What “uploaded” normally means. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website. That copy is what the word “upload” means, and it is the part nobody explains.

What happens instead. This site does not do it. There is no server here that receives files, so your audio file is read, converted and handed back by the browser you are using right now. It never travels — so there is no copy to store, read, leak or hand over.

Check it yourself in ten seconds

Turn off your Wi-Fi after this page has loaded, then convert a file anyway. It still works, because everything needed is already on your device.

The longer explanation of how this works, and the full detail of what is and is not stored on the privacy page.

Why this matters more than it sounds

An audio file is a conversation. Transcribed by machine — which is cheap now — it becomes searchable text about whoever was speaking. It matters more than it sounds, because of what audio files usually are:

Meeting audio

internal discussion, named people, unannounced decisions

Unreleased music

work whose commercial value depends on control of the master

Call recordings

both sides of a conversation, often legally sensitive

Interviews

a source's voice is identifying even when the name is not said

A file that is never sent cannot be kept, leaked, subpoenaed or used to train anything. That is a property of how this works, not a promise about how carefully it is run.

Cutting without re-encoding

Trimming keeps the part of the recording between your start and end points and discards the rest. Where the format allows it, the audio is copied rather than re-encoded, which is both instant and lossless — the kept portion is bit-for-bit what it was.

That copy has one consequence worth knowing: compressed audio is stored in blocks, and a cut can only land on a block boundary. The actual start may sit a few tens of milliseconds from where you asked. For speech and music that is inaudible; for precise edits against a video it occasionally matters.

Ends, not middles: This removes from the start and the end. Cutting a section out of the middle and joining what remains is a different job.
Nothing fades: The cut is abrupt by design. If the recording is loud at the cut point you will hear a click, which a fade in an audio editor would avoid.

Measured, not estimated

What this tool actually does to a file

Keeping the first second of a two-second recording.

The result came out 22% smaller than the file that went in.

Each row is one document, chosen because this tool behaves differently depending on what is inside the file.
Sample	In	Out	Change
An easy clipThe compressible end of the range — a clean tone, or a moving test pattern — where a codec does its best work.	32.3 KB	25.1 KB	−22%
A hard clipThe other end — pink noise, or dense video grain. Close to incompressible by design, and the worst case for every codec.	32.3 KB	25.1 KB	−22%

Produced by this site's own converter. The same code that runs in your browser, at the same default settings, so these are the bytes you would download.

Samples are generated from a fixed seed rather than taken from real photographs or documents, so the corpus is reproducible and carries no licensing question — and so the numbers predict the shape of your result rather than its exact size. Measured 2026-10-01. The method, and the command that regenerates every figure on this page, are on the how it works page.

About these formats

Accepts

MPEG-1 Audio Layer III

The universal lossy audio format.

Extensions: .mp3
MIME type: audio/mpeg
Best for: Music players · Podcasts · Maximum compatibility
Compatibility: Plays absolutely everywhere.

Accepts

Waveform Audio

Uncompressed PCM audio. Perfect quality, big files.

Extensions: .wav, .wave
MIME type: audio/wav
Best for: Editing and mastering · Sound design · Archival
Compatibility: Universal.

Good to know

Trim Audio — questions

How does Trim Audio work?

Cut audio down to the section between two timestamps. Add your files above, adjust anything you want to change, and press the button. The result downloads straight to your device.

Is Trim Audio safe — are my files uploaded to a server?

No, nothing is uploaded. On most online tools, pressing the button copies your file across the internet onto a computer owned by that website, where it is processed and then sent back. That copy is what "upload" means. This tool does not do it: your file is read and processed by the browser you are using right now, stays on this device the whole time, and is discarded when you close the tab. Turn off your Wi-Fi after the page loads and it still works, which is the quickest way to confirm it.

Can I use this on confidential or personal documents?

Yes — that is the case it was built for. Because the file never leaves your device, a confidential document is no more exposed than it is sitting in your own folder: there is no transfer, no copy on anybody else's hardware, no retention period and no staff with access. Nothing about the file is logged either — not its name, not its size, not its contents.