Audio Trimmer
Cut an audio clip down to a specific start and end point
Your files are processed on your device. The first use downloads a processing engine, which your browser then keeps.
Drop an audio file to trimTap to choose an audio file to trim
or click to browseor tap to choose
Keep a range or cut a section out. A video works too: its sound is trimmed.
Large files (over 500 MB) may take longer or run out of browser memory
About Audio Trimmer
Cuts an audio clip down to a specific start and end point (Keep selection), or deletes a section from the middle and joins the two ends (Remove selection), such as a cough or an ad read. A video file works too: its sound is trimmed and saved as audio. Runs in your browser: the audio never leaves your device, but the first use downloads a processing engine from a public CDN.
Upload your audio file (or a video), listen to the preview to find your spot, then drag either end of the range slider to set the start and end points (shown in minutes:seconds, or typed exactly). Choose Keep selection to cut away everything outside the range, or Remove selection to delete the range and keep the rest. You can also add fades, use the 30-second Ringtone button, and watch the waveform. The output keeps the format of the file you uploaded. Listen to the result, then download it.
This re-encodes the audio to trim precisely at the exact time you specify, unlike a fast video-style copy trim — which means it takes a little real processing time, but the cut point is exact rather than snapped to the nearest keyframe.
Watch: Audio Trimmer in Action
- Is the trim point exact, or snapped to the nearest available point?
- It's exact — this re-encodes the audio to trim precisely at the time you specify, unlike a fast video-style copy trim that snaps to the nearest keyframe. It takes a little more processing time in exchange for that precision.
- Will trimming lower the sound quality?
- WAV and FLAC are written losslessly. MP3, M4A and OGG are encoded again at high settings (MP3 VBR level 2, M4A 192 kbit/s, OGG quality 5), so a very small generation loss is possible. Keep your original file.
- How precise is the cut?
- The slider moves in 0.1 second steps, and the Start and End boxes accept any decimal value. Because the clip is re-encoded, it begins at the time you set instead of snapping to the nearest frame boundary of the source.
- Can I cut a section out of the middle instead of keeping a range?
- Yes. Choose Remove selection above the slider, set the start and end of the part to delete (a cough, an ad read) and press Remove Section. The part before and the part after are joined with a few milliseconds of fade so the join does not click. Keep selection, the default, does the opposite and keeps only the range.
- Can I trim a video file?
- Yes, the sound of a video can be trimmed here: drop an MP4, MOV, WebM or MKV and the result is saved as audio (M4A for MP4, otherwise MP3). A video with no audio track is reported as soon as it loads. To take the whole sound track out without trimming, use Extract Audio.
- What happens if I type an end time before the start time?
- A message appears under the Start and End boxes naming both times, the box keeps what you typed so you can fix it, and the Trim button stays off until the times make sense.
- What does the Ringtone (30 s) button do?
- It leaves the start where it is and sets the end 30 seconds later, or at the end of the file if that comes first. You can still adjust either end afterward, and add fades before trimming.
- What format will the trimmed file be?
- The same family as the one you dropped: WAV, FLAC, M4A or OGG when it matches one of those, and MP3 for anything else. The download name is trimmed_ followed by the original name with the new extension.
- Can I cut an MP3 without losing quality?
- Not bit for bit. Every trim here decodes the clip and encodes it again, so an MP3 is written again at high settings (VBR level 2) and a very small generation loss is possible. The cut point stays exact in exchange. If you need a lossless copy, choose a WAV or FLAC file, which are written without loss, and keep your original MP3.
- Can I make an iPhone ringtone?
- This tool cuts the clip to the times you set (the Ringtone (30 s) button sets a 30-second end for you), but it keeps your file's format and does not save the .m4r file an iPhone needs. For an iPhone ringtone, use the Ringtone Maker, which saves an M4R for iPhone or an MP3 for Android.
- Why is the Trim Audio button greyed out?
- It is disabled while the file's length is still being read, while a trim is running, or when the size notice says the file is too large to process. Wait for the player to show a duration, then it becomes active.
How to use Audio Trimmer
Drop an audio file and press play to find your spot; Preview from start jumps to the beginning of the selected range. Set the range by dragging the two ends of the slider, which moves in 0.1 second steps, or by typing into the Start and End boxes as minutes:seconds or plain seconds. The waveform above the slider highlights the selected part and dims the rest.
Optionally pick a Fade in and a Fade out of 0.5, 1, 2, 3 or 5 seconds, or leave both on none. The Ringtone (30 s) button keeps your start and moves the end to 30 seconds later. Press Trim Audio, wait for the progress bar, then use the download button; the saved name begins with trimmed_.
When to use it
Use it to cut a ringtone or alarm sound from a song you own, drop the silence or false start from a voice memo, lift one answer out of a podcast interview, or shorten a sound effect before it goes into a video or game. The fades soften the abrupt edges of a clip that was cut mid-sound.
When not to use it
It keeps one continuous range from one file, or removes one section and joins the rest. To rearrange sections, remove several parts at once, layer tracks or reduce noise you need a full audio editor or a merge tool. It also stays within the file's own format family, so convert separately if you need another format. Because the audio is re-encoded, a lossy file is not cut byte for byte.
Tips for best results
The waveform is a fast way to find a quiet gap; cutting there avoids clicks. Add a 0.5 or 1 second fade when you cut in the middle of a note. Fades are capped at half the clip length, so a very short clip never fades past its middle. Type exact times when dragging is too coarse: a start that is not earlier than the end is refused with a message under the boxes, and Trim stays off until it is fixed. Choose Remove selection to delete a cough or an ad read and join the rest.
Limitations
Output follows the input: WAV stays WAV, FLAC stays FLAC, M4A, AAC and MP4 become M4A, OGG, OGA and Opus become OGG, and everything else, MP3 included, comes out as MP3. Lossy results are re-encoded at a fixed high setting, not copied. The waveform appears only when your browser can decode the file, and cover art is kept where the format allows.
Privacy
The file is decoded twice on your device: once by your browser for the player and waveform, and once by FFmpeg running as WebAssembly for the actual cut. The audio is never uploaded. The only download is the FFmpeg engine, about 25 MB from the jsDelivr CDN, fetched when you press Trim Audio. The trimmed clip exists only in memory until you save it.
Next: Audio Merger
Combine it with other clips if needed
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