Join audio files
Voice memos, songs, recordings — merged into one MP3, in your order. Never uploaded.
Drop audio files here or click to browse
MP3, WAV, M4A, OGG — even video soundtracks. Reorder below, join, download one MP3. Nothing is uploaded.
One recording from many pieces
Lecture halves, interview parts, voice memos that got split, a mixtape from singles: most audio ends up in pieces. Online joiners make you upload every part and wait in a queue. QuietPix runs FFmpeg in your browser instead, so a two-hour recording joins as fast as your machine allows and never touches a server.
Formats can be mixed freely. Everything is normalized to the same sample rate and stereo layout before joining, so a phone memo sits cleanly next to a studio WAV. Need to cut something first? Use the audio trimmer, then come back and join the parts. Working purely with music files? TheMP3 joiner is the same engine with a songs-first workflow.
Frequently asked questions
How do I merge multiple MP3 files into one?
Drop the files, drag nothing: use the arrows to set the order, then click Join. You get one MP3 with all tracks back to back. Everything runs in your browser; nothing is uploaded.
Can I mix different formats, like a WAV and an M4A?
Yes. Every input is decoded and normalized to the same sample rate and channel layout before joining, so MP3, WAV, M4A, OGG, FLAC and even the audio track of a video file can be combined in one go.
Is there a gap between the joined tracks?
No. Tracks are concatenated sample-to-sample with no added silence. If you hear a gap, it exists at the end of the source file itself — trim it first with our audio trimmer.
Is there a limit on the number or length of files?
No fixed limit. Your device does the work, so a hundred voice memos or a two-hour set are fine; longer jobs just take longer. The output is a 192 kbps MP3.
Is anything uploaded?
No. The audio engine (FFmpeg compiled to WebAssembly) downloads once and runs on your device. Your recordings never leave your computer.