Audio Trimmer & Cutter
Cut and trim MP3, WAV, M4A and other audio files on a zoomable waveform. Add fades, make a ringtone and save as MP3, WAV, M4A or M4R, all in your browser.
Upload Audio
Drop a file here or click to browse
Drag on the waveform to select. Drag the handles to adjust.
Selected
0:00.000
Result: 0:00.000
Type times as 1:23.456 or seconds like 83.5. Shortcuts: Space plays, ← → nudge the start, Alt + ← → nudge the end (hold Shift for 1 second steps), + and − zoom.
1. What to do with the selection
This volume is loud enough to clip (distort) the loudest parts. Lower it or use Normalize.
2. Save as
Make a ringtone
Sets a 30 second selection from the start point, a 2 second fade out and the right format. You can still change everything.
Format
Encoding…
Your audio is ready
- Length
- Format
- Size
Your audio never leaves your device. Cutting, fades and every export format, including iPhone ringtones, run in your browser.
How to use Audio Trimmer
-
1
Open your audio file. Drop an MP3, WAV, M4A, AAC, OGG, Opus or FLAC file onto the box, or click it to choose one. The file is decoded in your browser and its waveform appears in a moment.
-
2
Select the part you want. Drag across the waveform to select a part. Drag the two handles to adjust it, or type exact start and end times such as 1:23.456. Double-click the waveform to select the whole track.
-
3
Zoom in for a precise cut. Use the zoom buttons, Ctrl or Cmd and the mouse wheel, or Zoom to selection to see the waveform up close. When zoomed, drag the overview strip to move around the track.
-
4
Keep it or cut it out. Keep selection saves only the highlighted part. Remove selection cuts the highlighted part out and joins what is before and after it with a crossfade, so the join doesn't click. A short 0.02 second crossfade suits speech; make it 0.5 to 2 seconds to blend music.
-
5
Add fades and set the volume. Type a fade in and fade out length, like 2.5 seconds, or drag the sliders. Pick a curve (linear, ease in, ease out or ease in-out), and choose whether the fade goes to silence or only dips to a lower volume. The fade is drawn on the waveform, and the play button next to each fade lets you hear it. Then set the volume, or tick Normalize to bring the loudest point to −1 dB.
-
6
Save as MP3, WAV, M4A or M4R. Pick a format and quality, press Trim audio, then play the result and download it. For a ringtone, press the iPhone or Android preset first.
By Mohit Khatri · Last updated
Learn more about Audio Trimmer
Direct Answer: Open the file, drag across the waveform to select the part you want, press Trim audio and download the result.
The waveform shows how loud the audio is over time. Quiet parts look thin and loud parts look tall, which makes it easy to spot silence at the start, the first beat of a song, or a pause between sentences. Zoom in to place the start and end exactly, then play the selection to check it before you save.
Direct Answer: Select the part you want to delete, switch to Remove selection, and export.
The tool keeps everything before and after the selection and joins the two parts. A cut made in the middle of a sound wave can make a small click, so the end of the part before the cut blends into the start of the part after it. This crossfade is 0.02 seconds by default, which is right for speech. For music, set Crossfade at the join to 0.5 to 2 seconds for a smooth blend. The two sides overlap, so the result gets shorter by the crossfade, and nothing from the removed part is heard. Press Preview the cut to hear a few seconds either side of the join before you save.
Fade in and fade out aren't offered in this mode: the start and end of the file stay as they were, and the only new edge is the join.
Direct Answer: Move the start handle to where the ringtone should begin, press the iPhone or Android preset, then press Trim audio.
- iPhone needs an M4R file of 40 seconds or less. The preset makes a 30 second M4R with a 2 second fade out. Add it to your iPhone with Finder on a Mac, iTunes on Windows, or by saving it to Files and opening it in GarageBand.
- Android plays MP3 ringtones. Copy the MP3 to your phone, then pick it in Settings, Sound, Phone ringtone.
Unlike many ringtone sites, ToolWeb makes the M4R file in your browser, so your song is never uploaded.
Direct Answer: Choose MP3 for sharing, WAV when you will edit the audio again, M4A for small files on Apple devices, and M4R for iPhone ringtones.
- MP3 plays everywhere. 192 kbps is good for most music and voice, and 320 kbps is the highest quality.
- WAV is lossless, so nothing is lost, but a minute of stereo audio is about 10 MB.
- M4A uses AAC, which sounds a little better than MP3 at the same size.
- M4R is AAC with the extension iPhone expects for ringtones.
M4A and M4R need a browser that can encode AAC, such as Chrome, Edge or Safari. If your browser can't, those buttons are greyed out.
Direct Answer: Saving as WAV loses nothing. Saving as MP3, M4A or M4R re-encodes the audio, which loses a little quality, usually not noticeable at 192 kbps or higher.
For the best result, trim the original file rather than a copy that has already been compressed several times, and pick the same or a higher quality than the source. Raising the volume above 100% can clip loud parts, so the tool warns you when that would happen. Normalize is the safe way to make quiet audio louder.
Direct Answer: Zoom in, cut in quiet moments, and use short fades.
- Cut in a pause. For speech, leave about 0.1 to 0.2 seconds of silence before and after so words don't sound chopped.
- Use a fade out when a song doesn't end on its own. One or two seconds sounds natural.
- Pick the right curve. Ease in for a fade in and ease out for a fade out sound the most even, because hearing works on a log scale. Linear can sound like the volume jumps at the quiet end.
- Dip instead of fading out when you want the music to keep going under a voice: set Fade from / to to about 20 to 30%.
- Nudge with the keyboard. The arrow keys move the start by 0.01 seconds, Alt with the arrows moves the end, and Shift moves by a whole second.
- Loop the selection to check that a clip repeats smoothly, for example for a notification sound.
- Undo freely. Ctrl+Z or Cmd+Z steps back, and the original file is never changed.