Audio Joiner & MP3 Merger

About Audio Joiner & MP3 Merger

Combine audio without uploading private recordings to a server.

Audio Joiner & MP3 Merger is a focused offline tool for joining clips one after another or mixing them together. Arrange every file in the right order, trim unwanted sections, preview your work and choose exactly how the finished audio is exported.

JOIN AUDIO IN ORDER

Add recordings, music or voice clips and combine them sequentially. Reorder files at any time and use crossfade for smoother transitions.

MIX AND OVERLAY

Switch to Mix mode when clips should play together instead of one after another. The app keeps these two operations clearly separated so the result matches your intention.

EDIT BEFORE EXPORTING

- Trim the beginning or end of every clip
- Adjust individual clip volume
- Drag to reorder your sequence
- Preview clips before creating the final file
- Normalize volume for more consistent loudness

CONTROL THE OUTPUT

- Export as MP3, M4A, WAV or AAC
- Select bitrate and quality
- Choose 44.1 kHz or 48 kHz sample rate
- Export in mono or stereo
- Choose the destination folder and filename

PRIVATE BY DESIGN

Audio processing happens completely on your device. Your files are not uploaded, and the app contains no advertising or behavioral tracking.

FREE AND PRO

Create up to three audio exports each day for free. A single Lifetime Pro purchase unlocks unlimited exports and all advanced output controls. There is no subscription.

Whether you are combining voice memos, podcast sections, songs, interview recordings or sound effects, Audio Joiner gives you a clear workflow without the complexity of a full audio editor.