Merge Audio

Join several audio files into one track. Add MP3, WAV, M4A, OGG, FLAC or Opus files, drag them into the order you want, and the merger uses FFmpeg compiled to WebAssembly to stitch them together with the concat filter. Everything runs in your browser, so your audio is never uploaded and never queued on a server.

Add your audio files

MP3 · WAV · M4A · OGG · FLAC

Drop audio here or click to browse

Add two or more files. New files are appended to the list

MP3WAVM4AAACOGGFLACOPUS

Merged audio

Add audio to start

Your merged audio will appear here

How to merge audio files

Add your audio files

Drop two or more tracks into the tool or click to browse. Each file is read on your device and its length appears in the list.

Set the order and the output

Use the up and down buttons so the tracks sit in the order you want, then pick MP3, WAV, M4A or OGG and the bitrate.

Merge and download

Click Merge audio and the tracks are joined into one file. Check the segment count and total length, then download the result.

Why use Aihangsoft Merge Audio

Order you control

The list order is the merge order. Move tracks up and down until the sequence is right, and join them in a single pass.

Audio stays on your device

The engine runs inside your browser tab, so voice notes, interviews and client recordings are never uploaded, stored or queued. Files never leave your device.

Mixed formats accepted

Combine an MP3, a WAV and a voice memo in one run. Everything is resampled and mixed to stereo first, so the joins stay clean.

Built for real audio assembly

Join music, speech or field recordings

Stitch a set of songs into one continuous track, or assemble several takes into a single voice memo without opening an editor.

Use case: albums, interviews, podcasts

One sample rate, no clicks

The concat filter needs matching parameters, so every input is converted to the same sample rate and to stereo before it is joined. That is what stops clicks or pitch shifts at the seams.

Use case: mixing phone recordings with studio audio

Output in four formats

Export the merged file as MP3, WAV, M4A or OGG. Choose 128, 192, 256 or 320 kbps for the lossy targets, or WAV for uncompressed PCM.

Use case: sharing, editing, archiving

Result summary before you save

The finished file is previewed in place with its segment count, total length and the size change from source to output, so you can listen before downloading.

Use case: checking length, comparing sizes

Related tools

Audio Trimmer

Cut MP3 and trim audio

Audio Converter

Convert between MP3, WAV, M4A and OGG

Video to MP3

Extract audio from a video

Merge audio FAQ

Yes. FFmpeg compiled to WebAssembly runs inside your browser tab, so your audio is never uploaded. There is no sign-up, no track limit and no fee, and the merged file carries no watermark. Audio only ever leaves your device when you download the result.
Add two or more tracks, put them in the order you want with the up and down buttons, then click Merge audio. Every file is written to a local working area, joined with the concat filter, and returned as a single download. You need at least two files to merge.
Merging re-encodes the audio rather than copying the original bytes, so the result is not bit for bit identical to the sources. Lossy targets such as MP3, M4A and OGG lose a little more detail, while WAV keeps the samples as they are. Choose WAV when you want the least change.
They are all converted to one common sample rate and to stereo before they are joined, which is what keeps the seams clean and stops clicks or pitch shifts at the joins. Because of that, a merge of mixed sources is not lossless even when you pick a lossless output.
The work happens in your browser memory, so very long recordings or a stack of large files can run out of room before they finish. If a merge fails on a big set, join it in two passes and merge the results.
Yes. The list order is the merge order, and the up and down buttons on each row reorder the tracks at any time before you run the merge. Removing and re-adding a file puts it back at the end of the list.

Merge your audio now

Free, private and unlimited. No account needed.

Upload audio files