How to trim audio online in 4 steps
- 01
Load your audio
Click Open file, drag a track into the drop zone, or select Try a demo. MP3, WAV, FLAC, OGG, M4A, and AIFF all decode directly in your browser at their original sample rate.
- 02
Select what to cut
Drag across the waveform, or type exact start and end times in milliseconds. Choose Keep selection to isolate a clip, or Remove selection to cut out the middle and rejoin the rest.
- 03
Shape and check the edit
Turn on snap to zero crossing to avoid clicks, add fade in and fade out, then loop the selection and flip the Original/Processed toggle to confirm it sounds right.
- 04
Render and download
Click Render preview, pick an output format, and choose Download audio. Save your fade and snap settings as a preset, or send the trimmed clip on with Continue in another tool.
What you can do with this audio trimmer
- Select a range by dragging on the waveform, or type exact start and end times in milliseconds for sample-accurate trims you can't get by eye alone.
- Switch between Keep selection, which isolates a clip, and Remove selection, which cuts a section out of the middle and rejoins what's left.
- Add fade in and fade out from 0 to 10 seconds so a trimmed clip starts and ends smoothly instead of popping in or cutting off abruptly.
- Snap the selection to the nearest zero crossing to avoid the clicks and pops that come from cutting mid-waveform.
- Loop the current selection during playback to check your in and out points before you commit to a render.
- Compare the trimmed result against the original with the Original/Processed A/B toggle before you download anything.
- Export as WAV (16-bit, 24-bit, or 32-bit float), MP3, FLAC, OGG, Opus, M4A, or AIFF, with source, 44.1 kHz, or 48 kHz sample rate and mono or stereo channels.
- Save your fade, snap, and format settings as a preset, or send the finished clip straight to another tool with Continue in another tool, with no re-upload.
What is an audio trimmer?
An audio trimmer, sometimes called an MP3 cutter, is a tool for removing everything outside a section of audio you want to keep, or cutting a specific section out and rejoining the rest. This trimmer does both, entirely in your browser: nothing you load is uploaded to a server, so a private voice memo or an unreleased demo never leaves your device.
The core workflow is a waveform you can select on directly, plus a way to type exact times when your eye and a mouse aren't precise enough. Both approaches feed the same engine, so a drag-selected clip and a typed-time clip render identically. You choose Keep selection when you want a single clip out of a longer file, or Remove selection when you need to cut audio out of the middle, like a mistake in a voice memo or a mid-song announcement, without splitting the file into pieces yourself.
How to cut audio without clicks or pops
A raw cut lands wherever you drop it in the waveform, and if that point isn't at a zero crossing, the point where the waveform's amplitude is at zero, the sudden jump in signal level plays back as an audible click or pop. It's a common problem when you trim song sections by ear on a busy timeline.
Snap to zero crossing fixes this automatically: turn it on and your selection edges shift to the nearest point where the waveform naturally crosses zero, so the cut starts and ends on silence rather than mid-wave. For anything with a more gradual entrance or exit, layer fade in and fade out (0 to 10 seconds each) on top. A short fade also masks room tone or a breath sound right at the edit point, which zero-crossing snap alone won't do.
Millisecond precision: drag or type exact times
Dragging on a waveform is fast, but it's approximate: at typical zoom levels a pixel can represent tens of milliseconds. When you need an exact cut, for example matching a beat, syncing to a video edit, or reproducing the same clip length across several files, type the start and end times directly instead. The millisecond fields accept precise values and update the selection on the waveform immediately, so you can still see and adjust visually afterward.
This matters most for use cases where being off by a fraction of a second is noticeable: a ringtone that clips the first note, a podcast clip that starts a syllable early, or a sample that needs to loop cleanly. Loop the selection to hear the boundary repeat before you render, and nudge the millisecond values until the loop feels seamless.
Common uses for trimming audio
People reach for an audio trimmer for a handful of recurring tasks, and the Keep/Remove split covers most of them without extra steps.
- Ringtones: isolate a short, recognizable section of a song and fade it in and out so it doesn't start or stop abruptly on a phone speaker.
- Voice memos: cut a long recording down to the part that matters, or use Remove selection to delete a false start or dead air in the middle.
- Podcast clips: pull a short excerpt for social media with exact in and out points so the clip doesn't start mid-word.
- Song intros or hooks: grab just the section you want for a sampler, a video edit, or a montage.
- Cleaning up recordings: remove a cough, a knock, or a long pause without re-recording the whole take.
Trimming compressed formats: what to expect
Lossless formats like WAV, AIFF, and FLAC store audio as uncompressed or losslessly compressed samples, so a trim is genuinely sample-accurate: the exported file starts and ends exactly where you set the times. Compressed formats such as MP3, AAC/M4A, and OGG work in fixed-size frames, and their encoders can add a small amount of silent padding at the start or end when you re-encode a clip, a side effect of how those codecs are built rather than anything this tool does.
In practice this means a trimmed MP3 or M4A might be a few milliseconds longer than the exact times you typed, even though the selection itself was precise. If you need a cut to be frame-accurate down to the sample, for a ringtone, a loop, or anything syncing to video, export as WAV or FLAC instead of a lossy format.
| Format | Encoder padding on export | Best for exact cuts |
|---|---|---|
| WAV / AIFF (PCM) | None — sample-accurate | Ringtones, loops, precise sync |
| FLAC | None — lossless and sample-accurate | Archival or lossless trims |
| MP3 | Small silent padding at frame boundaries | General clips and sharing |
| AAC / M4A | Similar frame-based padding to MP3 | Podcast and voice-memo clips |
| OGG Vorbis / Opus | Minor encoder priming samples | Web playback and voice clips |
Tips for cleaner trims
- Turn on snap to zero crossing whenever you're cutting mid-phrase. It moves your edit point to where the waveform crosses silence, which removes clicks without touching the fade controls.
- For a ringtone or a clip that needs to feel polished, add a short fade out. A raw cut sounds abrupt on a phone speaker or in a short video.
- Type exact millisecond values instead of dragging when you need the same clip length across several files.
- Export to WAV or FLAC when the cut length needs to match your typed times exactly, since compressed formats can add a small amount of encoder padding.
- Loop the selection before rendering. It's the easiest way to catch a lingering breath, click, or half-second of dead air your eye missed on the waveform.
- Use Remove selection to delete a mistake or long pause from the middle of a recording instead of exporting two clips and rejoining them yourself.
- Save a frequently used fade length and export format as a preset so repeat trims take one less step.
Frequently asked questions
Is my audio uploaded to a server when I trim it?
No. Trimming runs on-device in your browser using the Web Audio engine. Your file is decoded and processed locally and is never sent anywhere, which is why it works the same whether the clip is a private voice memo or an unreleased track.
Is this audio trimmer really free?
Yes. There's no sign-up, no watermark on the export, and no payment required. The only practical limits are a 150 MB input file size and whatever memory your device has available for processing longer files.
What audio formats can I trim?
Anything your browser can decode, which typically includes MP3, WAV, FLAC, OGG/Opus, M4A/AAC, AIFF, and often WebM. Exact support varies slightly by browser. Export covers WAV, MP3, FLAC, OGG, Opus, M4A, and AIFF regardless of the input format.
What's the maximum file size for trimming?
150 MB per file. Very long or high-resolution files can still run into your device's own memory limits before hitting that cap, particularly on phones, so a long recording may process more slowly or need to be handled in sections on lower-memory devices.
Does trimming reduce audio quality?
Cutting itself doesn't degrade quality — you're just keeping or removing samples. If you export to a lossy format like MP3, that final encode has the same quality trade-offs as any MP3 export. Export as WAV or FLAC if you want to avoid any re-encoding loss.
Can I use this to make a ringtone?
Yes. Select the section you want, add a short fade in and fade out so it doesn't start or stop abruptly, and export as MP3 or M4A depending on what your phone expects. Typing exact millisecond times helps if you want a specific length.
Does this work on iPhone or Android?
The trimmer runs in mobile browsers, since it doesn't rely on a downloaded AI model the way some other tools do. Performance depends on your device and the file size — very large files may be slower to load and process on a phone than on a desktop.
Why does my trimmed clip click at the start or end?
That happens when the cut point falls in the middle of a waveform cycle rather than at a zero crossing. Turn on snap to zero crossing, or add a short fade in and fade out, to smooth the transition instead of cutting sharply.
What's the difference between Keep selection and Remove selection?
Keep selection exports only the part of the waveform you selected, discarding everything else. Remove selection does the opposite: it deletes the selected section and rejoins what comes before and after it, so you can cut a mistake or a pause out of the middle of a file.
Can I loop just the selected part before exporting?
Yes. Loop plays your current selection on repeat so you can listen for clicks at the boundaries or confirm the length feels right before you render and download.
How is the audio trimmer different from the audio joiner?
This tool removes or isolates a section of one file. The audio joiner does the opposite: it combines up to 50 separate clips into one file, with crossfades or gaps between them. Trim first, then join, if you need both.
Can I trim a file and then convert it to a different format?
Yes, in one step. The output format select on the trimmer covers WAV, MP3, FLAC, OGG, Opus, M4A, and AIFF, so you don't need a separate conversion pass. For batch conversion of many files at once, the audio converter is built for that.
Will the exported clip have silence added at the start or end?
It can, by a few milliseconds, if you export to a compressed format like MP3 or M4A — their encoders add small amounts of padding at frame boundaries. This is a property of those codecs, not a trimming error. Export as WAV or FLAC for exact, sample-accurate length.
Can I save my trim settings for future files?
Yes. Save preset stores your fade length, snap setting, and output format locally in your browser, so you can load the same setup the next time you trim a similar file.
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