Audio Cutter and Trimmer
Drop in a track, pick the part to keep or the part to cut out, add a fade if you want one and export a WAV. It runs in your browser, handles files up to 150 MB and 15 minutes, and nothing is sent anywhere.
Use audio you made or have permission to use. Nothing is sent anywhere, so we never hear or keep it.
Clip cut. Melodious can turn the finished track into a music video — See the music video maker
Seven worked examples
Each case is the tool's own arithmetic run on a three-minute stereo track at 44,100 Hz. The numbers are what the widget above would show for the same settings.
Keep seconds 60 to 90
- Output: 0:30.000 (1,323,000 frames), 5.0 MB
Remove seconds 60 to 90 instead
- Output: 2:30.000 (6,615,000 frames), 25.2 MB
Remove them with a 50 ms blend at the join
- Output: 2:29.950 (6,612,795 frames), 25.2 MB
- Join blended over 50 ms
The same 30 seconds with a 2 s fade in and a 3 s fade out
- Output: 0:30.000 (1,323,000 frames), 5.0 MB
- Fades: 2.00 s in, 3.00 s out
Fades longer than the clip are shortened to fit
- Output: 0:01.000 (44,100 frames), 172 KB
- Fades: 0.50 s in, 0.50 s out
- The fades were shortened to fit inside the clip.
A 10-minute cut is refused, not attempted
- Refused: That WAV would be 100.9 MB. The limit is 100.0 MB, because the file is built in your browser's memory. Choose a shorter part.
How big one minute of output is
- Stereo, 44,100 Hz: 10.1 MB a minute
- Stereo, 48,000 Hz: 11.0 MB a minute
- Mono, 44,100 Hz: 5.0 MB a minute
Frames are single time slices of the audio, one per sample at the file's rate. Duration is the number of frames divided by the sample rate, which is how a player reads a WAV.
How to cut an audio file
Drop an audio file onto the box, or choose one. The page decodes it, draws its waveform and selects a starting region. Decide first whether you are keeping a part or removing one, then set the start and the end. Type them in seconds for an exact edit, or move the sliders and let the waveform show you where you are.
Press Play the result before you export. The preview is built from the same samples the file will contain, so a click at the join, a word clipped at the start or a fade that is too short is something you hear now rather than after the download. The readout above the buttons gives the exact length, frame count and file size, and the export button writes the file and downloads it.
Trimming the ends, and cutting out the middle
Most cuts are trims. A track starts with a second of silence, a voice memo ends with the sound of you reaching for the stop button, a song has a long outro you do not want. Keeping the part you chose handles all of these in one pass, because only the highlighted section survives.
Removing a part is the editor's other half. A cough in the middle of a vocal take, a section of a podcast intro you want to drop, a verse you decided against: choose the unwanted part and the two sides close up. A straight join is exact but can click, so the blend option is there for exactly this case, and the examples above show how much shorter the blend makes the result.
Fades, and why a hard cut can click
A sound wave swings above and below zero. If you cut at a moment when it is far from zero, the first sample of the new file starts with a jump, and the ear hears a click. The cure is a very short fade. Set a fade in and a fade out of even a few tenths of a second and the clip begins and ends from silence.
Longer fades are a creative choice. A two or three second fade out is the classic way to end a clip that was cut from the middle of a song, and a fade in softens an abrupt start. The linear shape is a straight ramp. The smooth shape follows an equal-power curve and tends to sound more even over a long fade. If the clip is shorter than the two fades together, the tool shortens them to fit and tells you so.
What you get, and what it costs in size
The export is a 16-bit PCM WAV at the sample rate your browser decoded the file at, and the widget shows that rate. A WAV is uncompressed, so it is much larger than the MP3 it came from. The tool refuses to write a file over 100 MB, and it opens files up to 150 MB and 15 minutes, because the whole file is held in memory while you work.
It handles mono and stereo. A file with more channels keeps its first two and says so. It does not change the pitch or the speed of anything, and it does not clean up noise. Browsers also differ in which formats they can open, so a file that fails here may open once you convert it to WAV or MP3. Phones have less memory than computers, so keep files short there.
What to do with the clip next
If the clip is for a loop, the audio loop maker repeats a region to a length. To join clips back together, the audio joiner puts them in order with a gap or a crossfade. If a clip is too quiet, the volume booster raises it by an exact number of decibels, and the reverse audio page plays it backwards.
To know the tempo before you cut on the beat, the BPM finder reads it from the file. To put the clip under a picture, the MP3 to video page turns a track and an image into a video file.
From a cut clip to a finished video
A short clip is often what a video needs most: the hook, the chorus, the thirty seconds people will watch. For the wider route, the guide to making a music video for your song covers it end to end.
When the clip should have scenes, a character and a story, the AI music video generator storyboards the track and renders it to your audio. It is paid, from $19/month, and you see the cost before anything renders. The WAV you cut here stays on your device unless you upload it yourself.
Frequently asked questions
How do I cut an audio file online?
Drop the file onto the box, set a start and an end in seconds, and press Play the result to hear exactly what you will get. When it sounds right, press Cut and export WAV. You can type the times or move the two sliders, and the arrow keys nudge a slider by a hundredth of a second.
What is the difference between keeping a part and removing a part?
Keep the part I chose gives you only the highlighted section, which is the usual trim: the start and end of the track go. Remove the part I chose does the opposite and gives you everything outside the highlighted section, joined together, which is how you take a cough, a mistake or a dead gap out of the middle.
Is an audio cutter the same thing as an audio trimmer?
Yes. Trimming means cutting from the start and the end, and cutting can also mean taking a piece out of the middle. This page does both with one tool, so whichever word you searched for, the controls are the same: a start, an end, and a choice between keeping or removing what is between them.
How exact is the cut point?
It lands on a single sample. The start and end you type are rounded to the nearest sample at the file's own rate, which is about a forty-fifth of a millisecond at 44,100 Hz. The waveform is for orientation; for a precise edit, type the time and listen to the result with Play the result before you export.
Why is the cut file larger than my MP3?
The export is an uncompressed 16-bit WAV, and an MP3 is a compressed file, so the same minute of sound takes roughly ten times the space. The page writes a WAV because it needs no encoder to download and adds no further loss to what your browser decoded. If you need a small file afterwards, convert the WAV to MP3 in your editor.
Does cutting an MP3 here lower its quality?
The cut itself removes nothing from the part you keep. Your browser decodes the MP3 to samples, the page keeps the samples you chose, and the WAV stores them as 16-bit numbers. The sound you hear is the decoded MP3, with no second round of compression, but the result is a WAV, not a smaller MP3.
How do the fade in and fade out work?
A fade ramps the volume at the start or the end of the cut file. With the linear shape the level rises or falls in a straight line, and with the smooth shape it follows an equal-power curve that sounds more even to most ears. The first sample of a fade in is silent and the last sample of a fade out is silent, which removes the click a hard cut can leave.
What happens at the join when I remove a part from the middle?
With the blend off, the two sides are joined sample to sample, which can click if the waveform is at a different level on each side. The blend setting mixes the end of the first side with the start of the second over 10 to 250 milliseconds with an equal-power curve. A blend overlaps the two sides, so the result is shorter than without it by exactly the blend length.
How long can the track be?
It opens files up to 150 MB and 15 minutes, and writes a WAV up to 100 MB, which is about 9.9 minutes of stereo at 44,100 Hz. Past a limit the tool refuses and tells you the size and what would fit, instead of freezing the tab. Cut a longer track in two passes if you need to.
Does the audio cutter upload my file?
No. The file is read by your browser, cut by code running in your browser and saved back to your device. There is no upload step and no account, and the code that does the cutting contains no network call. Closing the tab clears everything. The network tab of your browser's developer tools will show no request carrying your audio.
Can I cut a song that someone else made?
Only if you have the right to. Use audio you made or have permission to use. A short clip of a commercial recording can still infringe copyright when it is posted, and this tool cannot tell whose audio a file holds, so the check is yours.
You have the right 30 seconds. The video is the next step
Attach the track and describe the look. An AI director storyboards it scene by scene and renders it to your audio. Plans from $19/month, and you see the cost before anything renders.
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