Free Audio Joiner
Combine multiple audio files into one track — free, no sign-up, no watermark.
Up to 10 files
150MB combined, any mix of supported formats.
Reorderable
Set the exact playback order before joining.
No sign-up
No account, no email, no watermark.
How to combine audio files
- Add two or more MP3, WAV, FLAC, M4A, AAC, OGG, or AIFF files.
- Use the up/down arrows to set the order they should play in.
- Choose an output format.
- Download the single merged file.
Why mismatched files still join correctly
Joining audio files directly is riskier than it looks — a file recorded at 48kHz followed by one at 44.1kHz, played back end-to-end without correction, can play the second file at the wrong speed and pitch. This tool resamples every input file to a common sample rate (44.1kHz) before joining, so files recorded at different rates, in different source formats, still combine into one correctly-playing track instead of shifting speed at the seam.
Want the fuller breakdown of what's actually happening when mismatched files get joined, and what "no gap, no crossfade" really means for the result? Read Why You Can't Just Concatenate Audio Files.
What happens to audio quality during joining
Because every input is resampled to a common rate as part of the join, each file goes through a decode-and-re-encode step rather than being spliced together as raw, untouched data — that's true even when the input and chosen output format already match. In practice the audible difference is minimal, but it's worth knowing this isn't a byte-for-byte lossless passthrough, the same way any format conversion involves an encoding step.
Common uses
Combining separately recorded podcast segments into one episode file, merging voice memos recorded across multiple takes, stitching together audio clips for a longer presentation, and joining separately downloaded tracks into a single continuous file.
Need to trim a file before adding it to the mix? Use the Audio Trimmer first. Want a smooth transition between joined files rather than a hard cut? Trim each clip with a short fade first using the Fade In/Out tool.
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Loudness Normalizer
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