merge Audio

Join several audio files into one

Combine songs, voice notes or podcast segments into a single continuous file. Different sample rates and channel layouts are matched automatically.

merge

Drop your audio files here or browse

Select two or more files — they are joined in the order shown

Large files are supported. Speed depends on your device.

lock Your file stays on your device. Nothing is uploaded.

Output format

Bitrate

192 kbps

lock This tool runs entirely in your browser. Your files are never uploaded, stored or shared.

How it works

Select your files

Choose two or more audio files in the order you want them joined.

Choose an output format

MP3 is the safest choice for sharing the result.

Join them

Each file is matched to a common sample rate before being combined.

What happens to your file

The track is opened, not sent

Editing audio normally means uploading the file and hoping the service is trustworthy. Here your browser opens the track from your disk, works on it in place, and saves the result back. The audio never crosses the network.

lockOpened from your disk by your browser — not sent anywhere first.
memoryHeld in the tab while the tool works, then dropped.
downloadSaved to your device by your browser, not by a link to a server.
delete_foreverClosing the tab clears the working copy completely.
visibility_offNo account, so nothing is ever attached to an identity.
analyticsNo tracking of what you worked on or what was inside the file.

There is no queue, no render farm and no waiting room. The track is worked on in front of you and released the moment the tab closes.

What people use it for

Stitching a recording back together

When a long session was captured as several files, joining them gives you one continuous track.

Sending a voice note that is too long

A ten-minute recording is a lot to ask someone to play. Trim it to the useful minute and it actually gets heard.

Fitting an episode inside a feed limit

Podcast hosts set a maximum size. Checking the result here saves a failed upload later.

Keeping a copy that will still open in ten years

A widely supported format is a safer long-term bet than a container only one app understands.

Formats & limits

What this tool accepts, what it produces, and what it will never ask you for.

Input: Select two or more files — they are joined in the order shown
Output: MP3, WAV, M4A, FLAC or OGG
Maximum file size: Set by your device, not by a plan
Files per run: One at a time
Sign-up required: None
Watermark: Never added
Works offline: Yes, once the page has loaded
Supported browsers: Any current Chrome, Edge, Firefox or Safari

When something goes wrong

Corrupt files, and formats outside the list above, stop with a plain message rather than a spinner that never finishes. If a track plays in your music app it will normally open here.

That file could not be opened

The audio container is not one the browser can read. Convert it to MP3 or WAV first, then run it through again.

Why not an upload site

An upload-based audio editor sends your recording to a server and sends the result back. Removing that round trip removes the waiting, the caps and the copy of your file.

A typical upload site

closeThe recording is copied to a server before anything happens.

closeYou wait for an upload, then wait again for the download.

closeLength and size limits come from a pricing tier.

closeVoice notes and unreleased mixes pass through infrastructure you did not choose.

closeBatch work needs an account and often a paid plan.

This tool

checkThe track is opened on your device and never moves.

checkNo upload at all, so no waiting on a transfer.

checkThe ceiling is your own machine, not a plan.

checkInterviews and unfinished work stay in the room.

checkNo account exists to restrict, so there is nothing to unlock.

Questions

In what order are my files joined? expand_more

In the order they are listed after you select them. To change the order, remove the files and select them again in the sequence you want.

Can I join files with different sample rates? expand_more

Yes. Every input is converted to a common sample rate before being combined, so mismatched files join cleanly.

Can I add a gap or crossfade between tracks? expand_more

The current version joins tracks back to back with no gap. A crossfade option is on the roadmap.

Is there a file size limit? expand_more

No fixed limit is imposed by the tool. The practical ceiling is how much memory your device has free, because the whole job runs inside this browser tab.

Does it work without an internet connection? expand_more

Yes, once the page has loaded. Nothing is fetched while you work, so a dropped connection does not interrupt a run.

Do I need an account or an email address? expand_more

No. There is nothing to sign up for, and nothing is ever attached to an identity because no file leaves your device.