100% private — runs in your browserMillisecond precisionNo upload · No watermark
Your workspace is empty. Add an audio file above to start cutting — everything is processed privately on your device.
How to cut audio in 6 steps
1
Upload your audio
Drag and drop an audio or video file onto the editor, or click to browse. The file loads straight into your browser — nothing is sent to a server, so even large tracks open instantly.
2
Find your cut
Press play and scrub the interactive waveform to locate the exact moment you want. Zoom in on the timeline to read transients, beats and silences down to the millisecond.
3
Select start & end
Drag the start and end handles across the waveform, or type precise timestamps. Fine-tune with keyboard nudges to land on a clean zero-crossing and avoid clicks.
4
Choose mode & format
Decide whether to keep the selection, delete a middle section, or split into multiple parts. Pick a lossless stream-copy cut or re-encode to MP3, WAV, AAC, FLAC, OGG, OPUS or M4A.
5
Cut / Export
Click Cut to process the file with the built-in ffmpeg.wasm engine. Add optional fade in/out, normalize loudness, trim silence or reverse — all rendered locally on your machine.
6
Download
Preview the result, then download the trimmed clip. Multi-segment cuts can be saved individually or bundled into a single ZIP, and batch jobs export every file in one click.
What Is an Audio Cutter?
An audio cutter is a tool that lets you trim, split and remove sections of a sound file so you keep only the parts you actually want. Instead of re-recording a take or wrestling with a heavyweight desktop editor, you load a track, mark a start and end point on the waveform, and export a clean clip in seconds. It is the fastest way to shorten a song, isolate a sentence from an interview, build a ringtone, or chop a long recording into manageable pieces.
This audio cutter runs entirely in your browser. There is no upload step and no server in the loop — a WebAssembly build of FFmpeg (ffmpeg.wasm) decodes, cuts and re-encodes the file directly on your own device. That means your audio stays completely private, the tool keeps working even if your connection drops, and there are no file-size caps imposed by an upload limit. The only practical ceiling is your computer’s available memory.
Beyond a simple trim, the editor supports lossless stream-copy cutting, millisecond-accurate selection, fade in and fade out, loudness normalization, automatic silence removal, reverse, and multi-segment splitting. You can keep a selection, delete a middle portion and rejoin the ends, or cut one recording into many separate exports. Finished clips download as MP3, WAV, AAC, FLAC, OGG, OPUS or M4A — all free, with no watermark and no sign-up.
How to Cut Audio Online
Cutting audio online with this tool takes four quick steps and never leaves your browser. Load a file, mark the part you want, fine-tune it, then export — the FFmpeg engine handles the heavy lifting locally so your recording stays on your machine the whole time.
Upload
Drag an audio or video file into the editor or click to browse. It opens instantly with no upload wait.
Select
Play the track and drag the start and end handles on the waveform, or type exact timestamps for millisecond precision.
Edit
Choose to keep, delete or split the selection and optionally add fades, normalize, remove silence or reverse.
Export
Pick a format and bitrate, click Cut, preview the result and download — individually or as a ZIP for multi-part jobs.
Cut Audio Without Losing Quality
There are two ways to cut a file, and only one of them can change the sound. A lossless stream-copy cut copies the original encoded audio packets straight into a new container without decoding them. Because no samples are re-compressed, the output is a bit-for-bit identical slice of the source — a cut MP3 sounds exactly like the original MP3, just shorter. This is the fastest mode and the right choice whenever your input is already in the format you want to keep.
The trade-off is precision: compressed formats are split into frames, so a pure stream-copy can only cut on frame boundaries (a few milliseconds of granularity) and may add a tiny amount of padding. When you need a perfectly tight edit, a crossfade between segments, a fade, normalization, silence removal or a format change, the tool re-encodes instead — it decodes the audio, applies your edits sample-accurately, and compresses again.
Unlike video, audio has no CRF setting. Re-encoding quality is governed by the codec and bitrate you choose. Export to a lossless codec such as WAV or FLAC and the audio is preserved with zero generation loss. For lossy formats like MP3, AAC, OGG or OPUS, pick a healthy bitrate — 192–320 kbps for music, 96–128 kbps for spoken voice — and a single re-encode is transparent to almost all listeners. Avoid repeatedly re-encoding the same lossy file, since each pass compounds compression artefacts.
Supported Audio Formats
The cutter reads virtually anything FFmpeg understands and exports to every mainstream audio format. You can open MP3, WAV, AAC, M4A, FLAC, OGG, OPUS, WMA, AIFF, AMR, CAF and many more — and even pull the audio track straight out of a video file such as MP4, MOV or WebM. Whatever you load, you choose the output container independently, so converting and cutting happen in a single pass.
Pick the export format to match your goal: MP3 for universal compatibility, WAV or FLAC for lossless archival and further editing, AAC or M4A for Apple devices and modern streaming, and OPUS or OGG for the best quality at small sizes on the open web. Each format carries a short note in the table below so you can match it to the job at hand.
MP3WAVAACM4AFLACOGGOPUSWMAAIFFAMRCAFMIDIAC3ALACWVMKA
Audio Editing Best Practices
A few small habits make trimmed clips sound polished and professional rather than abrupt. Use these guidelines whenever you cut, split or clean up a recording.
Cut on zero-crossings
Place edits where the waveform crosses the centre line to avoid the pops and clicks caused by slicing mid-cycle.
Add fades
A short fade in and fade out — even 10–30 ms — smooths the start and end of a clip and hides any residual edit click.
Normalize for consistency
Normalize or loudness-match so every clip sits at a comparable level, especially when stitching segments from different sources.
Trim silence
Remove dead air at the head and tail (and long gaps in the middle) to tighten pacing without touching the content you care about.
Mind the sample rate
Keep the source sample rate (commonly 44.1 kHz or 48 kHz) unless you have a reason to change it; needless resampling adds work and can soften audio.
Mono for voice
Voice memos, podcasts and ringtones are often fine in mono — it halves the file size with no perceptible quality loss for speech.
Podcast & Music Editing
For podcasters, the cutter is a fast cleanup station between recording and your full DAW. Top and tail each episode, lift out flubbed takes and long pauses, pull a punchy 30–60 second audiogram for social media, and normalize so every guest lands at the same loudness. Because everything runs locally, sensitive interview audio never touches a third-party server — a real advantage when you are handling confidential or pre-release material.
For musicians and listeners, the same waveform editor makes quick work of common jobs: trim a track down to its hook, isolate a sample or stem, set custom loop points, or create a ringtone in the exact length and format your phone expects. Lossless stream-copy keeps your original quality intact when you only need to shorten a song, while re-encoding to a clean MP3 or AAC gives you a shareable file at the bitrate you choose — all without uploading your music anywhere.
Privacy & Security
Privacy is the default here, not an upgrade. Every operation — decoding, cutting, fading, normalizing and encoding — happens inside your browser using a WebAssembly build of FFmpeg. Your audio is never uploaded, never written to a remote disk, and never seen by us or any third party. There is no account to create and no cloud library that could be breached, because nothing about your file leaves your device in the first place.
This makes the tool well suited to confidential recordings: legal depositions, medical notes, unreleased music, internal meetings and personal voice memos. When you close or refresh the tab, the file and all of your edits are discarded from memory automatically. And because the processing is fully client-side, you can even disconnect from the internet after the page loads and continue working with complete functionality.
Frequently Asked Questions
Answers to the most common questions about cutting, trimming and splitting audio in your browser — including quality, formats, privacy, mobile support and the practical limits of a fully client-side tool.
Your audio stays private
No upload
Your audio is processed entirely in your browser. It is never transmitted to or stored on any server.
Nothing retained
When you close the tab, the file and every edit are gone. There is no account, cloud copy or history to delete.
Runs on your device
A WebAssembly build of FFmpeg does all decoding, cutting and encoding using your own CPU — no remote workers.
Works offline
Once the page has loaded, you can disconnect from the internet and keep cutting audio with full functionality.
Frequently asked questions
Free forever, private by design. Every cut runs on your own device with real FFmpeg — no upload, no watermark, no sign-up and no daily limit. Close the tab and nothing remains.