Audio Trimmer & MP3 Cutter
Drag the waveform to pick a range, adjust the volume, preview it live, then export as WAV or FLAC.
🔒 Processed locally — nothing is uploadedMP3, WAV, FLAC, OGG or M4A
Related tools
Cutting a clip out of a song, a podcast, or a voice memo shouldn't need installing an editor. This tool decodes your audio with the browser's own engine, shows you a waveform to drag a start and end point on, lets you adjust the volume and preview the result live, then exports exactly that range as a clean WAV or FLAC file — no upload, no re-encoding of a file that's already lossy.
How to trim a clip
Upload a file and its waveform appears — a visual map of loud and quiet sections that makes it much easier to find the exact moment you want than scrubbing blind. Drag either handle to set the start and end of your selection, hit Preview selection to hear just that range before committing, then Trim & Export to render it. Nothing is uploaded at any point — the waveform, the preview playback and the final export are all generated from the file already sitting in your browser's memory.
Adjusting volume while you trim
The volume slider goes from 0% (silent) to 300% (three times louder) and applies to your trimmed selection specifically, not the whole file — useful when the part you're cutting out is quieter or louder than the rest of the recording. Drag it while Preview selection is playing and you'll hear the level change live, no need to re-render first.
Normalize automatically finds the loudest moment within your selected range and calculates the biggest safe boost — enough to make it as loud as possible without clipping (a harsh digital distortion that happens when a boost pushes a sample past the range digital audio can represent). If your current setting would clip, a warning appears before you export anything.
Why WAV or FLAC instead of MP3 out
Trimming an MP3 the naive way — decode it, cut it, re-encode it back to MP3 — means compressing an already-lossy file a second time, which measurably degrades audio quality (a well-known problem called generation loss). This tool sidesteps that entirely by exporting the trimmed range as WAV (uncompressed, universally compatible) or FLAC (same audio quality, roughly half the file size of WAV). Either way, what you download sounds exactly as good as what the browser decoded from your original file (plus whatever volume change you chose) — nothing extra is thrown away.
Common reasons to trim audio
- Pulling a clip from a longer recording. A favorite moment from a song, a quote from a podcast, a highlight from a voice memo.
- Removing dead air. Cutting silence or fumbling from the start or end of a recording before sharing it.
- Preparing source material for a ringtone. Trim the exact snippet first, then convert it to whatever format your phone actually wants.
- Shortening a sample for a video edit or presentation. Get just the seconds of audio you actually need before dropping it into a timeline.
Frequently asked questions
What audio formats can I trim?
Anything your browser's built-in audio decoder can open — MP3, WAV, FLAC and OGG work everywhere, and M4A/AAC works in most browsers (Firefox support for it depends on the operating system's own codecs, so it can occasionally fail there).
Why can't I export the trimmed clip as MP3?
This tool decodes your file to raw audio and re-encodes it, and re-encoding to MP3 would mean compressing an already-lossy file a second time, stacking on more quality loss. Exporting as WAV or FLAC instead keeps the trimmed clip exactly as good as the decoded original, with FLAC keeping the file smaller than WAV at no quality cost.
Is there a length or file size limit?
Only whatever your device's own memory can hold — everything happens in your browser's memory, not on a server, so very long files (hours of audio) may be slow or use a lot of RAM on lower-end devices.
Does trimming re-encode the whole file, or just cut it?
The whole file is decoded to raw samples first (that's unavoidable to work with any input format), then the selected range is sliced out directly — no re-encoding of the audio data itself happens until the final WAV/FLAC export step.
Can I use this to make a ringtone?
You can trim out the clip you want, but this tool exports WAV or FLAC rather than the .m4r format iPhone ringtones specifically require, so you'd need to convert the result separately if that's the end goal.
Does this tool upload my audio file anywhere?
No. Decoding, trimming, volume adjustment and encoding all happen locally in your browser — the file never leaves your device.
What does "Normalize automatically" do?
It finds the loudest moment within your selected range and calculates the biggest volume boost possible that stops just short of clipping — the fastest way to make a quiet clip as loud as it can safely be.
Can I lower the volume instead of raising it?
Yes — the slider goes from 0% (silent) to 300% (3x louder), so anything below 100% reduces volume instead.