Merge PDF files — without uploading them
Expense reports, signed contracts, scanned receipts — combining PDFs is routine. Most sites upload your files first. This one doesn't: the merge runs in your browser.
- 50 pages in ~2 seconds
- Bookmarks and links preserved
- No 25 MB cap
- Works offline once loaded
Five steps. All local.
iKeepPDF runs in your browser using JavaScript — no server in the loop.
Open the Combine tab
Click the button above or go to /combine.
Drag your PDFs in
Drop multiple files at once. Accepts PDF, JPG/PNG/WebP, Word, Excel, Markdown, HTML, text, CSV.
Reorder them
Drag file cards to set order. Output follows top-to-bottom.
Pick page size
A4, Letter, or Legal. Plus orientation and margins.
Combine and download
pdf-lib merges in your browser. ~2 seconds for 50 pages.
Drop almost anything. Get a PDF back.
Practical limit is browser memory (~500 MB on desktop Chrome).
PDF → PDF
Pages copied as-is. Text, links, bookmarks preserved.
Images → PDF
Each image becomes a page at your chosen size.
Word → PDF
Basic formatting fine; complex layouts may shift.
Excel → PDF
Pick which sheets to include.
Your files never leave your device.
Tools like SmallPDF and iLovePDF need their servers to process your files — those servers see them, log them, and have leaked them. For invoices, contracts, or medical records, that's a risk.
- Every file uploads before merging starts
- Free tier caps you at 2/day or 25 MB
- Filenames and IPs logged for "abuse prevention"
- Runs entirely in your tab — zero network calls
- No 25 MB ceiling. Only RAM matters
- Verify in DevTools → Network: no outbound request
Browser-based has limits. Be honest about them.
When browser tools aren't the right pick.
Very large files (1 GB+)
Browser memory struggles. Server tools handle these better.
Batch automation
No API. For pipelines, use pdftk or Ghostscript.
OCR (scans → text)
Not built in. Run OCR first, then merge.
Phones with limited RAM
Fine for small PDFs. For 100 MB+, use desktop.
Common questions about merging PDFs.
How many PDFs can I merge at once?
As many as browser memory holds. Tested with 20 files totalling 80 MB on desktop Chrome without issue.
Are bookmarks and links preserved?
Yes. pdf-lib's copyPages transfers pages with bookmarks, links, and annotations intact.
Can I merge a Word doc with a PDF?
Yes. Drop .docx and .pdf in one session. Word is converted to PDF first, then merged.
Can I merge only specific pages?
Combine merges whole files. To pick pages, open the PDF in Edit first, delete unwanted pages, then drop the result into Combine.