Free Audio Joiner — Merge MP3 & WAV Files Online

Stitch podcast segments, voice memos, or song chapters into one seamless track. Drop in up to 10 audio files, drag them into order (or use the arrow buttons), add a crossfade so the joins melt together, and download a single WAV. Everything is decoded and merged right in your browser — your files never leave your device.

How it works

1. Drop in your files — up to 10 MP3, WAV, or OGG files. Each one is decoded in your browser (a “decoding…” label shows while it loads).
2. Order them — files merge top to bottom. Use the ↑ ↓ buttons to rearrange until the sequence is right.
3. Add a crossfade — 0s gives clean hard cuts; 0.5s smooths podcast edits; 2s blends songs like a DJ. The overlap is capped at half of each clip so short files never break.
4. Merge offline — everything renders faster than real time with an OfflineAudioContext, with volume envelopes drawn around each join.
5. Preview and download — check the mix, then grab the single merged WAV file.

Your files never leave your browser — no uploads, no accounts, no server involved.

Everyday uses

• Podcasters — join intro, segments, ads, and outro into one episode file.
• Audiobooks & courses — stitch chapter recordings into a single listening file.
• Voice memos — combine scattered phone recordings into one note.
• DJs & playlists — blend songs with 2-second crossfades for seamless mixes.
• Event planners — merge ceremony music cues into one track so nothing gets missed.

Tip: the merged file downloads as WAV (uncompressed, plays everywhere). If you need a smaller file afterwards, run it through our Audio Converter for WebM, or convert WAV to MP3 in any desktop app.