Put MP3 files in order, trim what you don’t need, crossfade between tracks and save one MP3 at the bitrate you choose. Your files are joined on your device and never uploaded.
Songs, podcast parts, audiobook chapters — up to 20. WAV, M4A and OGG can be mixed in.
🎧 Drop MP3 files here, or tap to choose
Drag the waveform edges to trim each track
Crossfade blends each clip into the next; the clean-up options are made for voice recordings.
MP3 plays everywhere; M4A is smaller at the same quality; WAV is lossless for editing.
Tap the box and choose your MP3 files. They appear with a waveform each, in the order you picked them.
Reorder with ▲ ▼. Drag the edges of a waveform (or type Start and End) to cut silence or an intro; set Volume per track.
Choose a Crossfade for DJ-style blends, or leave it at “None” for tracks back to back. Add a fade in or out if you like.
Pick MP3 and a bitrate — 192 kbps for music, 128 for speech, 320 for the best quality — then press 🔀 Merge audio, listen, and download.
💡 Tip: Joining audiobook chapters or podcast parts? Leave crossfade off and turn on Even out volume so every part plays at the same loudness.
Plenty of “MP3 joiners” hand back a WAV ten times the size, or re-upload your files to a server first. This one decodes your tracks in the browser, lets you trim and blend them, and encodes one standard MP3 with a WebAssembly build of the LAME encoder — the same encoder most desktop software uses. Choose the bitrate yourself: 128 kbps for voice, 192 for music, 320 when quality matters most.
Each track shows its waveform: drag the left or right edge to trim, or type exact times. Crossfade overlaps the end of one track with the start of the next using an equal-power curve, so the join has no dip in loudness. Even out volume brings quiet and loud tracks to a similar level without clipping. Need other formats? The Audio Merger also saves M4A and lossless WAV, and the Voice Recording Merger is tuned for voice notes.
Add your MP3s above, put them in order, optionally trim or crossfade, choose a bitrate and press Merge audio. Download the single MP3 when it is ready.
192 kbps is the sweet spot for music; 128 kbps is plenty for speech and podcasts; 320 kbps is the highest MP3 quality.
Yes — choose a crossfade from 0.5 to 5 seconds. The end of each song blends into the next with an equal-power fade.
No limit from us — up to 20 files per merge. Very long merges (hours) need a device with enough memory.
Yes, with no watermark, no signup and no daily cap.
No. Decoding, editing and encoding all run in your browser on your own device — your audio is never sent anywhere.
Everything on AIMerger brings things together — here is what pairs with this one.