How to use the Merge Audio
- Choose two or more audio files (you can add more later).
- Reorder them with the ↑ ↓ buttons.
- Pick nothing, a gap or a crossfade between tracks.
- Preview and download the merged WAV file.
Join tracks without an editor
Put interview segments in order, glue intro music to a podcast, or combine voice notes into one file. Files with different sample rates and channel counts are converted to match, and a short crossfade smooths the joins between songs.
Cut each piece first with the Audio Trimmer. Record new parts with the Voice Recorder.
Also searched as: join audio, combine mp3, audio joiner, merge mp3 files, combine audio files, join wav, mp3 merger, concatenate audio.
Tools that pair well with the Merge Audio
- Audio Speed Changer — Make audio faster or slower — 0.5× to 2× — and choose whether the pitch changes with it (chipmunk / slowed effect) or stays the same (for lectures and practice).
- Reverse Audio — Play any sound backwards: choose an audio file or record your voice, hear it reversed instantly and download it as WAV.
- ZIP File Creator — Drop files or a whole folder, choose a compression level and download a standard .zip archive — built entirely in your browser, so even large or private files stay on your device.
- Screen Recorder — Record your entire screen, one window or a browser tab — with your microphone and the tab’s or system audio.
Frequently asked questions
How do I concatenate audio files?
Choose the files, put them in order and download: they are joined end to end into one WAV. Pick a gap or a crossfade if you want space or a smooth blend between them.
Can I merge different formats?
Yes. Mix MP3, WAV, M4A, OGG and more — everything is decoded and combined into one WAV file.
Is there a file size limit?
Only your device’s memory. An hour of stereo audio uses about 600 MB while merging.
Are my files uploaded?
No. Merging happens entirely in your browser.
Can I install Merge Audio as a web app and use it offline?
Yes. Merge Audio is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.