By ShinobiTools Team · Last updated: August 2026
Drop in two or more files, put them in the right order, and get one MP3 back. Free, no account, nothing installed.
A voice memo from a phone, a WAV from a recorder and a downloaded MP3 have different sample rates and channel counts, which is what makes most joiners refuse them or produce a chipmunk noise halfway through. Everything here is converted to the same format first, so the join is seamless whatever you feed it.
Recordings almost always start with a few seconds of shuffling and end with someone reaching for the stop button. Run each piece through the audio cutter first and the join comes out clean, without a pause where the seam is. Doing an interview or a podcast, in parts? Cut each part's ends, join them here, and if the room was noisy, CleanGrab takes the background hiss off afterwards.
This puts files after each other. It does not lay them over each other — no mixing a voice on top of a backing track, and no crossfade between the pieces. That's a job for a multitrack editor like Audacity. What we do have on the other side is the opposite operation: the stem splitter takes one finished song apart into vocals, drums, bass and the rest.
Yes — no account, no e-mail, no watermark and no daily limit.
Up to ten in one go, and up to about 100 MB and an hour of audio in total. Need more? Join ten, then join the result with the rest.
Yes. Everything is brought to the same sample rate and channel layout first, which is exactly what stops the pitch or speed jumping at the seam.
No — they run straight into each other. If you want a pause, trim the pieces so one has a moment of silence at the end.
No. This is a plain join; crossfading is editor work, not a one-click job.
No. Your upload is deleted the moment it's processed and the stems are wiped from the server within 45 minutes. Nothing is stored, shared or used to train anything — see privacy.