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PDF · Merge

Merge PDFs. One file, done.

Drop multiple PDF files, drag to set the order, click merge. Download a single perfectly combined document — entirely in your browser.

  • Files never leave your device — merging runs locally in WebAssembly.
  • Drag to reorder documents before merging. Perfect sequence every time.
  • Bookmarks, hyperlinks and metadata preserved in the output.
Input →
PDF 1.4 PDF 1.7 PDF/A PDF/X Encrypted PDF
→ Single merged PDF

Trusted by 980K people · 2.1M PDFs merged every month

Your PDFs stay in the browser throughout. No upload, no account.

980K
Monthly users
2.1M
Merges / month
0
Files uploaded
What people say

From lawyers to students — they all merge here.

★★★★★

I merge contracts and annexes every week. Nothing gets uploaded — client documents stay where they are.

GP
Greta P.
★★★★★

I merge thesis chapters and the drag-to-reorder means I don't have to rename files to get the order right.

LM
Lucas M.
★★★★★

Merged a 200-page technical manual from 12 files. Bookmarks came through intact. Fast enough that I had to double-check it had actually finished.

FR
Felix R.
★★★★★

Our office switched from a paid desktop app to this. Same quality, zero cost, works on every machine without installing anything.

CS
Carol S.
★★★★★

The merge runs in the tab — nothing gets sent. Matters when you're dealing with client contracts.

AN
Alex N.
★★★★★

I merge contracts and annexes every week. Nothing gets uploaded — client documents stay where they are.

GP
Greta P.
★★★★★

I merge thesis chapters and the drag-to-reorder means I don't have to rename files to get the order right.

LM
Lucas M.
★★★★★

Merged a 200-page technical manual from 12 files. Bookmarks came through intact. Fast enough that I had to double-check it had actually finished.

FR
Felix R.
How it works

Merge in three steps

Drop, order, merge. The whole process takes under 10 seconds.

STEP 01

Drop your PDFs

Drag multiple PDF files onto the upload zone. You can add more later from the queue.

STEP 02

Set the order

Drag documents into the sequence you want. Preview page counts before committing.

1
report.pdf
2
annex.pdf
3
cover.pdf
STEP 03

Download merged PDF

Click Merge. Your browser combines everything locally and downloads the result.

merged.pdf47 pages · 3.2 MB
1
2
3
4
Reorder

Drag to set the perfect sequence

See all your documents listed as draggable rows. Grab and reorder them until the sequence is right, then merge. What you see is what you get.

  • 01
    Visual document listEach file shows its name and page count so you always know what you're working with.
  • 02
    Add files at any timeDrop more PDFs into the queue before clicking merge. No need to start over.
  • 03
    Remove individual filesClick the × on any file to remove it from the merge without affecting the others.
Privacy

Your documents never leave your device

The entire merge operation runs inside your browser using WebAssembly. We have no server to receive your files — because we never built one.

  • 01
    Zero network requestsOpen the Network tab while it runs — nothing is sent. The merge happens entirely in the tab.
  • 02
    Works offlineOnce the page loads, you can disconnect from the internet and still merge PDFs.
  • 03
    No account requiredNo sign-up, no email, no tracking pixel. Just the tool.
FAQ

Common questions

Does kindatool upload my PDFs to a server?
No. The merge runs entirely in your browser using WebAssembly. Your files are never transmitted anywhere — they stay on your device from start to finish.
How many files can I merge at once?
There's no hard cap — the limit is your device's RAM. In practice, merging dozens of PDFs totalling hundreds of megabytes works fine on any modern laptop.
Are bookmarks and hyperlinks preserved?
Yes. Internal bookmarks, hyperlinks, and most PDF metadata are preserved in the merged output. External links pointing to web URLs are always kept intact.
Can I merge password-protected PDFs?
You'll be prompted to enter the password before a protected PDF can be merged. Once entered, the tool decrypts it locally and includes it in the output.
What's the maximum file size?
Only your device's available memory. A modern laptop can comfortably handle PDFs totalling 500 MB or more. Very large files with many embedded images may take a few seconds longer.
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Ready to merge your PDFs?

No account. No upload. No watermark. Just drop your files and get a perfectly merged PDF in seconds.

100% localNo accountNo watermarkFree forever