Audio Cutter & MP3 Trimmer — Free Online
Cut a section out of an MP3, WAV, M4A, FLAC or OGG by start and end time — fast and lossless, with no re-encoding, and the clip keeps its original format. Runs entirely in your browser; your file is never uploaded.
How do I cut audio without losing quality?
To cut an audio file, load it, drag the Start and End sliders to the section you want to keep — with the audio player above to find the exact spot — and press Trim audio. It works on MP3, WAV, M4A (AAC), FLAC and OGG, and the clip comes back in the same format you put in. The tool cuts by copying the audio stream rather than re-encoding it, so the export is fast and there is no quality loss: the kept section is identical to the original between your two points. It is ideal for making ringtones, clipping a podcast segment, cutting a voice memo, or grabbing the best part of a track. Everything runs on your device with ffmpeg compiled to WebAssembly, so your file is never uploaded. Need to change format first? Run it through the Audio Converter. If the clip comes out too quiet, raise it with the Volume Booster, or flip it end-to-end with Reverse Audio.
Frequently Asked Questions
How do I cut an MP3?
Drop an MP3 (or WAV, M4A, FLAC or OGG) onto the box or click to choose one, then set the start and end of the part you want to keep using the two sliders (or scrub with the player). Press Trim and the tool cuts that section out in your browser and lets you preview and download the result. Nothing is uploaded, so it is safe for private recordings, voice memos and music you own.
What audio formats can I cut?
MP3, WAV, M4A (AAC), FLAC, OGG and most other common audio formats. The cut is a lossless stream copy that keeps whatever format you put in — a WAV comes out as WAV, an M4A as M4A — so the trimmed clip matches the original exactly. The file picker accepts any audio file your browser recognises. To change format, use the Audio Converter first or afterwards.
Does trimming reduce the audio quality?
No — trimming does not reduce audio quality. The cutter copies the audio stream instead of re-encoding it, so the cut clip has exactly the same bitrate and quality as the original and the export is very fast. Because there is no re-encode, there is no generation loss — the kept section is bit-for-bit identical to the source audio between your two points, in the same format.
Is my file uploaded to a server?
No — the trimmer runs entirely on your device with ffmpeg compiled to WebAssembly, so your MP3 is never uploaded, logged or stored. The engine downloads once on the first run (about 10 MB) and is then cached, so later runs start instantly. Closing the tab clears everything.
How accurate is the cut?
Because it copies the stream for speed rather than re-encoding, the cut snaps to the nearest MP3 frame boundary near your start point — a difference of a few hundredths of a second at most, which is inaudible for voice and music. If you need a sample-exact cut for professional editing, use a dedicated audio editor; for trimming ringtones, clips, podcasts and voice memos this is more than precise enough. One MP3 frame at 44.1 kHz holds 1,152 samples, about 26 milliseconds.
Can I make a ringtone with this?
Yes — a ringtone is just a trim. Load your song, set the start and end to the section you want (many ringtones are the first 20 to 30 seconds of a chorus), press Trim and download the clip. The output is a standard MP3 you can transfer to your phone. Everything stays on your device, so you never have to upload your music to a website to make the cut.
How big an MP3 can I trim?
There is no server-side cap, because the trim happens in your browser tab — the limit is your device's memory. Trimming is a stream copy rather than a re-encode, so it is far lighter than a conversion and handles long files comfortably. You need a current Chrome, Edge, Safari or Firefox — the engine uses WebAssembly and DecompressionStream.