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免费 Audio Joiner

Merge multiple audio files into one, in any order, with optional crossfade. Export as MP3, M4A, or WAV. Runs entirely in your browser — no upload.

无文件大小限制文件保持私密无需登录永久免费

将文件拖放到此处或点击浏览

MP3, WAV, FLAC, OGG, AAC, M4A, Audio 无文件大小限制

你可以一次拖放多个文件

浏览文件

你的文件永远不会离开你的设备。所有处理都在你的浏览器中本地进行。

Optimize for your platform

Stitching audio files together normally means an upload to an ad-heavy site. This merges them with the real FFmpeg engine running in your browser.

1
FFmpeg.wasm loads once
The WebAssembly build of FFmpeg (~30 MB) downloads on first use and is cached afterwards.
2
You add and order your files
Drop in multiple audio files and arrange them with the up/down controls. Nothing is uploaded.
3
FFmpeg concatenates them
The tracks are joined in order — back-to-back, or with a smooth crossfade between each — using FFmpeg's concat/acrossfade filters, all on your CPU.
4
Download the merged file
The result is encoded once to MP3, M4A, or WAV and offered for download.

No upload, no queue, no watermark. Combine podcast segments, voice memos, or music privately — your audio never leaves your device.

✓Completely free — no hidden costs, ever

✓No account, email, or login required

✓Files stay on your device — processing happens in your browser

✓Works on any device — phone, tablet, desktop

✓No watermarks on any output

✓Browser memory limits may apply for very large files