Merge PDFs without uploading anything
Combine PDFs in your browser. Fast, free, and your files never leave this device.
Drop PDFs, or click to browse
Drop at least two PDFs to merge.
How Locdone does this
No servers. No uploads. Just your browser's own abilities.
Drop your PDFs
Add as many PDFs as you want. Drag them to reorder. They live in your browser tab, not on a server.
Locdone combines them
pdf-lib reads each file's pages and copies them into a single new document — byte-level work, done on your CPU.
Download the merged PDF
The combined file is available for download. No file ever left your computer in the process.
Questions
Are my PDFs really not uploaded?
Really. To verify: close your WiFi/internet, drop PDFs, and watch the Network tab in DevTools (F12) stay empty while merging completes.
Can I reorder files before merging?
Yes. Drag the files in the list to set the order they'll appear in the final PDF.
What if a PDF is password-protected?
Locdone will let you know it can't read encrypted PDFs and won't silently strip protection. Remove the password in your PDF viewer first, then come back.
Is there a limit on how many files?
No fixed cap. Practical limits depend on your device's memory. Locdone handles dozens of typical scans without issue.
Do I need an account?
No. Locdone has no login system. There's nothing to sign up for.
More tools
Every one runs on your device. Nothing is uploaded.