MergeDo
Local processing
English

No upload, no limits, no waiting

Check for yourself that we do not upload your files

Most online tools send your file to their server. We do not: all processing happens in your browser. You do not have to take our word for it — you can check.

  1. 01

    Open the developer tools

    Press F12 in Chrome or Edge, or right-click the page and choose Inspect. In Safari, first enable Show Web Inspector from the Develop menu.

  2. 02

    Switch to the Network panel

    Click the Network tab and tick Preserve log. This step matters, because otherwise the log is cleared whenever the page changes.

  3. 03

    Clear the existing requests

    Click the blocked icon at the top left to empty the log. Everything you see afterwards comes from your own action.

  4. 04

    Pick files and merge

    Go back to the tool, choose a PDF or a few audio files, and press the merge button.

  5. 05

    Confirm that nothing was uploaded

    Alongside those, expect one third-party request to analytics.ahrefs.com, our cookieless page-view tracker. It never receives your file contents, and it cannot see your file names. No POST or PUT carrying a file: nothing left your device.

The one exception worth naming is page-view analytics: Ahrefs measures which pages are read using a cookieless tracker that stores no identifier on your device. Your files are outside its reach either way.

Try it yourself