Merge PDF files in your browser
Combine multiple PDF files into one document. Free online PDF merger with drag-and-drop reordering.
Fast answer
Use Merge PDF when you need one combined PDF output from several source files while keeping page order under your control.
What this tool is best for
- Combining invoices, statements, or scanned sections into one final PDF.
- Merging supporting documents before sharing them with a portal or client.
- Reordering multiple PDFs into one final package without leaving the browser.
Inputs and outputs
Inputs
- One or more PDF files.
- Optional drag-and-drop reordering before export.
Outputs
- A single merged PDF file.
- Page order preserved from your chosen sequence.
About This Tool
Merge PDF allows you to combine multiple PDF documents into a single file quickly and easily. Whether you're consolidating reports, combining scanned documents, or assembling a presentation, this tool makes the process seamless.
Simply upload your files, arrange them in your desired order using drag-and-drop, and merge them into one cohesive document. The tool preserves the quality of your original files and can optionally maintain bookmarks from each source document.
All merging happens locally in your browser, ensuring complete privacy for your sensitive documents.
Practical guide for this tool
Use Merge PDF when you need one combined PDF output from several source files while keeping page order under your control.
What this tool does
- Combines multiple source PDFs into one output while preserving the order you choose before export.
- Keeps the workflow focused on document assembly, so it is useful for packets, reports, scan batches, and supporting documents.
- Leaves page content unchanged unless the source files already contain different page sizes, rotations, or annotations.
When to use it
- Combining invoices, statements, or scanned sections into one final PDF.
- Merging supporting documents before sharing them with a portal or client.
- Reordering multiple PDFs into one final package without leaving the browser.
Practical examples
- Combine monthly reports: start with January.pdf + February.pdf + March.pdf and check that the output matches Q1-report.pdf.
- Join scan batches: start with scan-1.pdf + scan-2.pdf and check that the output matches complete-scan.pdf.
Privacy and file handling
- Use this tool only on documents you own or have permission to process.
- OpenToolsKit is designed around browser-side processing where applicable, but you should still inspect the downloaded result before sharing it.
- Keep the original file until the output has been opened and verified.
Common mistakes to avoid
- Merging files before checking version names such as final, final-v2, and signed-copy.
- Forgetting to open the merged output and verify the first page of each section.
- Using merge when only a few pages are needed from a larger file; extract or split first in that case.
Troubleshooting
- If the output order looks wrong, return to the file list and drag sources into the exact sequence before exporting again.
- If one file fails to merge, open it separately or try Repair PDF before adding it back to the merge.
How to Use
Upload PDF Files
Drag and drop multiple PDF files into the upload area, or click to select files from your device.
Arrange Order
Drag and drop the file thumbnails to arrange them in your desired order.
Merge and Download
Click the Merge button to combine all files, then download your merged PDF.
Use Cases
Combine Reports
Merge monthly or quarterly reports into a single annual document for easier distribution and archiving.
Assemble Portfolios
Combine multiple project documents, certificates, or work samples into a professional portfolio.
Consolidate Invoices
Merge multiple invoices or receipts into one document for accounting and record-keeping purposes.
When to use this instead of a related tool
Split PDF
Use this adjacent tool when the job moves beyond merge pdf into a related PDF workflow.
Compare with Split PDFOrganize PDF
Use this adjacent tool when the job moves beyond merge pdf into a related PDF workflow.
Compare with Organize PDFLimitations and edge cases
- This tool does not split a PDF into parts. Use Split PDF when you need separate files.
- It will not edit text inside pages. Use Edit PDF for annotations or page-level visual changes.
Examples
Combine monthly reports
Input
January.pdf + February.pdf + March.pdf
Output
Q1-report.pdf
Join scan batches
Input
scan-1.pdf + scan-2.pdf
Output
complete-scan.pdf
Task pathways
Where this fits in pdf workflows
Organize and manage PDF pages hub
Choose the closest task in this PDF category before switching tools.
Go to Organize and manage PDF pages hubBuild a multi-step PDF workflow
Chain adjacent PDF actions when one tool is only part of the job.
Go to Build a multi-step PDF workflowBrowse all browser PDF tools
Scan every live PDF utility and route to the right next action.
Go to Browse all browser PDF toolsFrequently Asked Questions
How many PDFs can I merge?
You can merge up to 100 PDF files at once, with a total combined size of up to 500MB.
Will the merged PDF maintain the original quality?
Yes, the merging process preserves the original quality of all documents without any compression or quality loss.
Can I merge password-protected PDFs?
Password-protected PDFs need to be decrypted first. Use our Decrypt PDF tool to remove the password before merging.
Will merging PDFs change the page content?
The merge workflow is intended to join pages into one file, not rewrite the text or images on each page. Always review the output because source files can contain different page sizes, rotations, or annotations.
What should I check before sharing output from Merge PDF?
Open the downloaded file and verify page order, readability, visible edits, and any privacy-sensitive details before sending or filing it.
Does Merge PDF upload my document to OpenToolsKit servers?
OpenToolsKit is designed around browser-side processing where applicable. Some browser features, third-party links, or unsupported file types can have different boundaries, so review the privacy page for details.
You May Also Like
If your problem is not exactly a merge pdf job, these adjacent tools are the closest next paths.