Merge PDF
Combine multiple PDF files into one. Drag to reorder before merging.
About Merge PDF
The Merge PDF tool combines two or more PDF files into a single document, preserving the exact layout, fonts and images of every page. Drag files into the order you want and the merged PDF is generated on your device — no account, no watermark.
Unlike copying pages into a word processor, merging keeps each source page at its original dimensions and avoids reflowing text or changing pagination. The order shown in the file list becomes the final document order, so you can place a cover sheet first, append supporting evidence, or arrange monthly files chronologically before processing.
Merging runs locally in your browser, so contracts, medical records and tax documents never sit on a server. The source files are not altered: the download is a new PDF, which means you can safely retry with a different order while retaining every original.
How Merge PDF works in practice
- 1Drag your PDF files onto the upload area (or click to browse).
- 2Reorder the files with the up/down arrows — list order becomes page order.
- 3Remove any file added by mistake with the × button.
- 4Click "Merge PDFs" and the combined file downloads as merged.pdf.
Jobs this tool is built for
- Combine a signed contract, schedules and supporting exhibits into one package before sending it to the other party.
- Join monthly bank statements or invoices into a single chronological file for an accountant or audit.
- Bundle a résumé, cover letter, portfolio pages and certificates into one application upload.
- Assemble scanned form pages that were saved as separate PDFs by a phone or office scanner.
What you can do here
- Combine any number of PDFs
- Drag-and-drop selection with reorder controls
- Preserves page dimensions, fonts and images
- Fully client-side — no uploads
- No sign-up, no watermark
Limits and honest caveats
- Bookmarks from the original files may not carry over, since the merge creates a fresh document.
How the result is produced
Merge copies page objects from the files you picked, in the order you arranged, into one new PDF. It does not reflow text or recompress images.
- 1.Read each file in the order shown in the list. Dragging a file changes that order before the merge runs.
- 2.Copy every page into a new document. A4 and Letter pages stay at their own size.
- 3.Send that document back as merged.pdf. The copies on your device are not overwritten.
- 4.The server reads the upload for that request and does not file it under an account. An encrypted PDF fails the request instead of being dropped quietly.
Worked example: three files, 12 pages
A 4-page invoice, a 1-page receipt, and a 7-page contract, in that order, become one 12-page PDF. Page 5 of the result is the receipt. If you drag the receipt above the invoice first, page 1 of the result is the receipt instead. Bookmarks from the originals are not copied into the new file.
Common questions about Merge PDF
Is there a limit on the number of PDFs?
No hard limit — practical limits depend on your device's memory. Merging 50–100 PDFs typically works fine.
Can I reorder pages after merging?
Reorder files before merging; afterwards, use Split PDF or Remove PDF Pages for further adjustments.
Are the original PDFs changed?
No. The tool reads the originals and creates a separate merged.pdf download; it does not overwrite files on your device.
Will differently sized pages be resized?
No. A4, Letter, landscape and other page sizes can coexist in the merged document, and each page keeps its original dimensions.
This page was written by the ToolSink team to explain how Merge PDF works on this site — it is not syndicated, scraped, or spun from another publisher. How we write tool guides · Site updates · About ToolSink.
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