Cut and Merge MP3 Online — Free MP3 Cutter and Merger

Cutting and merging are usually two tools: you trim in one app, then hunt for a joiner for the result. It doesn't have to be. With the audio merger on the home page you cut each file down to the part you want, put the pieces in order, and export one MP3 — all in a single pass, all in your browser, with no upload and no watermark.

How to cut and merge MP3 files

1. Add your files. Open the tool and click Browse, or drag your MP3 files onto the drop zone. WAV, M4A, OGG, FLAC, and AAC files are welcome too — useful when a voice memo arrives in another format.
2. Put the pieces in order. Drag the rows, nudge them with the ↑ / ↓ buttons, or click Sort by name (1, 2 … 10) if your files are already numbered takes.
3. Cut each file. Click the scissors button on a row, set the start and end of the section you want to keep (in seconds), and press Apply. A chip on the row shows the trimmed range; reopen the panel to adjust it or press Clear to restore the full file.
4. Choose how the pieces meet. Direct joins them as-is; Add pause inserts 0.5–10 s of silence; Crossfade overlaps the end of one clip with the start of the next with a fade.
5. Listen before exporting. Each row has a ▶ button, and every junction has its own listen button so you hear exactly where the cut lands.
6. Export. Merge & Download MP3 encodes at 192 kbps; Merge & Download WAV is there when you want an uncompressed copy.

Cutting tips that save a second pass

• Use decimals. Cut points accept tenths of a second (12.5 works), and the tool snaps to the exact sample — no need to trim twice because the cut landed mid-word.
• Keep two parts of one file. To drop a middle section, add the same file twice and trim each copy to the part you want; the pieces then merge like any other files.
• Leave a little handle. When in doubt, keep about half a second around speech — you can also insert a short pause at the join instead of cutting it closer.
• Mind MP3 edges. MP3 encoders add a few milliseconds of padding at file boundaries; that's the format, not the tool. For gapless material such as live sets, export WAV instead.

What to expect

MP3 keeps things light: a 192 kbps stereo file runs about 1.4 MB per minute, so even long voice projects stay easy to send. All decoding, cutting, and joining happen in your browser's memory — batches of up to about 30 files or 3 hours of audio are comfortable on a typical computer, and a few short files finish in seconds. On a phone, keep batches smaller. If the result is going back into an editor, exporting WAV avoids a second lossy encode later; the guide to merging WAV files covers that workflow.

Frequently asked questions

Will cutting and merging reduce the quality?

Your files are decoded in the browser, the cuts are applied to the decoded audio with sample precision, and the result is encoded once at export — MP3 at 192 kbps, or WAV as uncompressed 16-bit PCM. Nothing is uploaded. Each export is one new encode, so start from your best sources and avoid re-merging already-merged MP3s again and again.

Is it really free?

Yes. No account, no watermark, no hidden export step. The whole workflow — cutting, ordering, joining, downloading — runs on your device.

Can I cut without merging?

Yes. Add a single file, trim it to the section you want, and export. The joiner simply has nothing to join.

Does it work with WAV or M4A files?

Yes. Any format your browser can decode can be cut and merged, and inputs can be mixed. For working with WAV recordings, see how to merge WAV files.

Where do my files go?

Nowhere. Nothing is uploaded; your audio lives in browser memory while you work and is saved only through your browser's download dialog. Close the tab and it's gone.

Ready when you are: open the MP3 cutter and merger on the home page, drop in your files, and trim your way to one clean track.