Merge MP3 (Audio Joiner): how it works
Combine lecture parts, podcast segments, voice memos or a playlist into a single file. Put the files in order, add a pause or a smooth crossfade between them, and download one MP3 or WAV.
Files of different formats and sample rates can be mixed; everything is converted to 44.1 kHz on your device.
How to merge MP3 and audio files
- Add two or more audio files.
- Order them and choose gaps or crossfades.
- Join and download.
Features
- Any input formatMP3, M4A, WAV, OGG, FLAC, video.
- CrossfadeSmooth transitions.
- GapsSilence between parts.
- PrivateNo upload.
Frequently asked questions
Is there a limit on the number of files?
No fixed limit; very long results need enough memory on your device.
Is the Merge MP3 (Audio Joiner) free?
Yes. The Merge MP3 (Audio Joiner) is completely free with no sign-up, no watermarks, no daily limits and no premium tier.
Are my files uploaded to a server?
No. FileStripe processes your files locally in your web browser using JavaScript. Nothing is uploaded, so the Merge MP3 (Audio Joiner) is safe for private photos and confidential documents and even works offline once the page has loaded.
Does it work on iPhone and Android?
Yes. The Merge MP3 (Audio Joiner) works in Safari, Chrome, Firefox, Edge and Samsung Internet on phones, tablets and computers. On a phone you can pick files from your photo library or files app and share the result straight to another app.
Last updated · Processing happens locally in your browser.