Audio Merger: Combine Audio Files Online Free
Join multiple audio files into one continuous track in the order you choose. Free online audio merger that runs in your browser with no upload.
Runs in your browser. Nothing is uploaded.
How it works
- Step 1: Choose your audio filePick a file from your device or drag it onto the page. It is read locally. The file is never transmitted.
- Step 2: Set the range and settingsSet the options you want and run it. Progress is shown as your browser works through the file.
- Step 3: Download the resultSave the finished file straight back to your device. Nothing is retained after you close the tab.
About this tool
- Runs in your browser. All processing happens locally in this tab using JavaScript.
- No uploads. Your data is never sent to a server. There is no server to send it to.
- Works offline. Once the page has loaded you can disconnect and keep working.
- Unlimited & free. No usage caps, no paywall, no file size tiers.
Choose an audio file
What happens to your data
The same questions a security review would ask, answered plainly.
- Read via
- The browser File API, on your device
- Held in
- Your browser tab's memory for as long as it is open
- Stored
- Nothing. No cookies, no database, no server-side copy
- Transmitted
- Nothing leaves your device
- Retained after you close the tab
- Nothing
- Works offline
- Yes, once the page has loaded
Why use this tool
What you get here that a server-side alternative cannot offer.
Your data never leaves the tab
There is no upload step and no server to receive one. The page loads once, then all work on your audio files happens in local JavaScript.
No caps or paywalls
No daily limits, no per-file ceilings imposed by a server tier, no watermarks, and no account. The practical limit is your own device's memory.
Frequently asked questions
Are my audio files uploaded to a server?
No. Everything runs locally in your browser using JavaScript. Your data is never uploaded to a server, and nothing is stored or logged.
Can I merge files with different formats or sample rates?
Yes. Each file is decoded first and resampled to a common rate before being joined, so mixed sources concatenate without pitch or speed artefacts.
Can I crossfade between tracks?
Files are joined end to end without a crossfade. Trim silence from the ends with the Audio Cutter first if you want a tighter transition.
Is there a file size limit?
There is no limit imposed by us, because there is no server tier to enforce one. The real constraint is your device's available memory, since the whole file is held in RAM while it is processed. Very large files are slower on phones than on a laptop.
Does it work offline?
Yes, once the page has loaded. The code that does the work is already in your browser at that point, so you can disconnect and keep using it. Reloading the page while offline needs the browser cache to still hold it.
Do I need to create an account?
No. There is no sign-up, no email, and no usage tracking tied to an identity. The tool works the first time you open it.