Several recordings into one continuous track — in your order, mixed formats welcome, joined on your own device.
Two or more tracks — mixed formats are fine · joined on your device, nothing is uploaded
No size limit · files are processed on your device and never uploaded · how it works
Advanced settings (optional)
Output
Format
Plays everywhere.
Runs in your browser. Files are never uploaded — you can go offline after the page loads.
How to use the Audio Joiner
Drop two or more audio files — mixed formats are fine.
Arrange them with ↑↓ — the list order is the play order.
Join, listen to the result in the page, download.
Easy to use
Drop files, pick options, download. Whole folders at once, no signup, no daily limit.
Best quality
The same engines the professionals use — SVGO, resvg, MozJPEG, libwebp, libavif — compiled to run in your browser.
Private & secure
Files are processed on your device and never uploaded. Close the tab and nothing remains anywhere.
One track from many pieces
Voice memos recorded in parts, a podcast intro plus the episode, chapters of an audiobook, a workout mix — joining
is the simplest edit there is, and it should not require installing an editor. Files are decoded and re-encoded as
one continuous stream, which is what makes mixed formats and sample rates join without glitches — a common failure
of tools that naively concatenate bytes.
Everything runs on FFmpeg in your browser; recordings never leave your device. Trim the pieces first with the
MP3 Cutter and even out levels with the Volume Booster.
Frequently asked questions
Can I join files of different formats?
Yes — an MP3, a WAV voice memo and an M4A join fine. Everything is decoded and re-encoded as one clean stream, so mismatched sample rates and formats never produce glitches at the joins.
What gets joined where?
Exactly the list order — use the ↑↓ buttons. Track 1 plays first.
Does joining lose quality?
One re-encode at 192 kbps — inaudible for voice and most music. Choose WAV out for a lossless working copy you will edit further.
Most online converters upload your file to a server. InfyTool ships the actual encoders to your browser as WebAssembly instead, so processing happens inside your tab — faster for batches, and nothing to delete afterwards.
No upload, ever. Turn off Wi-Fi after the page loads and every tool keeps working.
No limits. No file-size cap, no queue, no watermark, no account.
Runs on your CPU. Batches use several cores in parallel; nothing is throttled.