Merge several audio files into one continuous track, with sample rates and channels matched automatically so nothing plays at the wrong speed.
The audio joiner sequences several files into one continuous track, handling the mismatches that usually cause problems. Files from different sources rarely agree on sample rate or channel count, and joining them naively is what produces audio that plays at the wrong speed or drops to one side — so the joiner matches them up first rather than leaving you to notice afterwards.
Use it to stitch recorded segments into a finished episode, chain takes together, or assemble a continuous mix. What it deliberately won't do is fix a loudness mismatch — if one file was recorded much hotter than the next, the join will be obvious no matter how clean the splice, and that's a job for the volume normalizer first. How to merge audio files without quality or sync issues covers what has to match.
There is no hard limit on the number of file segments you can chain sequentially — the only real boundary is your device's available memory, since every file is fully loaded into memory before joining. In practice, most phones and laptops handle dozens of typical songs in one queue without issue, though very long sessions on lower-memory mobile devices may need to be joined in smaller batches. This is handy for stitching together a full podcast episode from separate segments, combining a DJ set's individual tracks, or merging voice memo clips into one continuous recording. Keep in mind you'll need at least two files queued up to merge — for a single file, there's nothing to join in the first place.
Yes — our joiner automatically detects if uploaded files have differing sample rates (e.g. 44.1kHz and 48kHz) or channel counts (mono and stereo) and automatically converts them to match the first track in your queue. If you want the final merged file at a specific sample rate, just make sure the first track you add is already at that rate, since every other file gets matched to it. The same applies to mono versus stereo — if you mix a mono voice memo with stereo music tracks, whichever format the first file uses becomes the format for the whole merged output. This matters most when combining recordings from different sources, like a phone voice memo alongside a professionally mixed track, where sample rates and channel counts often don't match by default.
Yes — use the up and down arrow buttons next to each queued file to reorder them, or remove one and re-add it if you'd rather redo the sequence from scratch. The files compile in the exact order shown in your queue, so double-check the sequence before merging since there's no separate preview of the combined track beforehand. This is useful for arranging a mixtape in a specific flow, putting an intro clip before a main recording, or fixing the order if you added your files out of sequence by mistake. Since file size and duration are both shown next to each entry, it's worth glancing at both before merging, especially if several files have similar-sounding names.