Audio Merger
Join several audio files into one — drag to reorder, add a silent gap between tracks, export MP3 or WAV.
How to Merge Audio Files in 3 Steps
Drop your files
Drag two or more audio files onto the left pane, in any mix of formats. Each one is decoded and listed with its length.
Order them
Use the ▲ ▼ buttons to reorder or × to remove a file. Open Settings to add up to 5 seconds of silence between tracks and pick the output format.
Merge and download
Click Merge audio. Files with different sample rates or channel counts are matched to the first file automatically, then joined and encoded.
Audio Merger — Frequently Asked Questions
Is my audio uploaded anywhere?
No. The file is decoded by your browser's Web Audio engine, processed on your device and encoded to MP3 or WAV with an open-source encoder running in the page. Nothing is sent to a server.
What if the files have different sample rates or mono/stereo?
They are all resampled and up-/down-mixed to match the first file in the list, so the result plays at one consistent rate. Put your best-quality file first.
Is there a limit on the number of files?
No fixed limit; memory is the constraint. Around 10 MB of RAM per minute of stereo audio is used, so joining an hour of material is fine on a laptop.
Which formats can I open and save?
Open anything your browser plays: MP3, WAV, M4A/AAC, OGG, Opus, FLAC and WebM audio. Save as MP3 (128, 192 or 320 kbps) or lossless 16-bit WAV. Pick the format under Settings before you run the tool.
Does it lose quality?
Decoding to raw samples is lossless; the only loss is the final MP3 encode, and 192–320 kbps is transparent for most listeners. Choose WAV if you plan to edit the result again — re-encoding MP3 twice stacks artefacts.