Merge PDF
Combine multiple PDF files into one. Drag to reorder before merging.
What is the Merge PDF?
The Merge PDF tool is a fast, browser-based utility that lets you combine two or more PDF files into a single, tidy document without installing any software or signing up for an account. Whether you are stitching together scanned invoices, chapters of a report or a set of certificates, the tool preserves the exact layout, fonts and images of each original page.
Because the merging happens locally in your browser, your documents never sit on a public server. You upload files, drag them into the order you want and the final PDF is generated on your device. This makes it an ideal option for sensitive paperwork such as contracts, medical records, tax filings or exam sheets.
ToolSink’s Merge PDF works on any modern browser — Chrome, Edge, Firefox, Safari — and adapts to mobile screens so you can rearrange pages with your thumb. There are no watermarks, no ads inside the output PDF and no size caps that make you upgrade to a paid plan.
How to use the Merge PDF
- 1Open the Merge PDF page and click the upload area (or drag your PDF files directly onto it).
- 2Select two or more PDF files from your device — you can add them one at a time or all at once.
- 3Use the up and down arrows to reorder the files. The order in the list is the final order in the merged PDF.
- 4Optionally remove any file you added by mistake using the × button next to it.
- 5Click the "Merge PDFs" button and wait a moment while the tool assembles your combined document.
- 6The merged file is automatically downloaded as merged.pdf. Open it to confirm the pages appear in the correct sequence.
Key features
- Combine any number of PDFs in a single click
- Drag-and-drop file selection with visual previews
- Simple reorder controls (up / down / remove)
- No file size limits enforced by the tool itself
- Zero uploads to third-party servers — the merge runs locally
- Preserves original page dimensions, fonts and embedded images
- Works on desktop, tablet and mobile browsers
- No sign-up, no watermark, no email required
Examples
Combining a scanned application
Merge cover-letter.pdf, resume.pdf and portfolio.pdf into one file called application.pdf that you can attach to a single email.
Bundling monthly invoices
A freelancer merges twelve monthly invoice PDFs into one annual document to send to their accountant at tax time.
Assembling course notes
A student merges chapter1.pdf through chapter8.pdf into study-guide.pdf so they only have to open one file while revising.
Why use this tool
- Saves time — no more emailing dozens of attachments
- Keeps documents organised in one clean file
- Runs entirely in your browser, so your files stay private
- Works offline once the page is loaded
- Free forever with no hidden export limits
- Reduces email attachment size compared to sending many small PDFs
Common use cases
- Combining a resume, cover letter and portfolio for a job application
- Stitching scanned pages of a signed contract back together
- Merging monthly bank statements into a yearly archive
- Bundling receipts for expense-report submission
- Combining research papers into a single reading list
- Merging photos-turned-PDFs into a photo album
- Attaching supporting documents to a legal filing
- Creating a single event handout from multiple flyers
Frequently asked questions
Is there a limit on the number of PDFs I can merge?
There is no hard limit. Practical limits depend on your device’s available memory, but most users can merge 50–100 PDFs without issue.
Are my files uploaded to a server?
No. The merge is performed locally in your browser using JavaScript, which means your PDFs never leave your device.
Will the merged PDF have watermarks?
No. ToolSink never adds watermarks, ads or branding to your output files.
Can I reorder pages after merging?
You reorder before merging using the up/down arrows. Once merged, you can use our Split PDF or Rotate PDF tools to make further adjustments.
Does the tool preserve bookmarks and links?
Most internal links and text formatting are preserved. Bookmarks from the original files may not carry over, since the tool creates a fresh document.
Which browsers are supported?
Any modern browser (Chrome, Edge, Firefox, Safari, Brave) released within the last two years should work smoothly.