Merge PDF Files
Join multiple PDF documents in the order you choose. Your PDFs are handled in browser memory and never uploaded to a MURDILIMAX server.
Merge PDF Files
Reorder the files using ↑ and ↓ below. Maximum 80 MB combined.
A modern browser is required; QR and PDF tools need internet to load libraries.
Selected files are never uploaded to our server.
How to use this tool
How to merge PDF documents
Choose two or more PDF files, arrange them using the up and down buttons and click Merge PDF. The tool copies pages from the selected files into a new PDF in the specified order. Your original documents are not changed. Download the result, then open it to verify the page count and sequence, particularly before sharing a contract or application.
Which PDFs can be combined?
Normal unencrypted PDF documents are supported. Password-protected or damaged PDFs may fail and should not be uploaded to random unlocking services. Interactive forms, digital signatures, embedded scripts and document permissions can change when pages are copied, so do not treat a merged file as legally equivalent to its signed originals. Keep signed documents separately and check official requirements.
Privacy and file-size limits
PDF content is processed locally in your web browser using a widely used JavaScript library. The code library loads from a CDN, but PDF contents are not sent to us. Browser memory has practical limits, so the first version allows up to ten PDFs and a combined input size of 80 MB. On a low-memory phone, process smaller groups. Download and check the resulting file before closing the tab.
When should you avoid merging PDFs?
Do not merge PDFs if an organization requires a specific signed original, certified file or unmodified attachments. The resulting PDF is a new file; page order and appearance should be checked. For scanning photos into a document, use our separate Images to PDF tool instead of adding photos as individual documents.
Frequently asked questions
Can I merge password-protected PDFs?
No. Remove encryption with an authorized PDF application if you know the password, then merge the unlocked copies.
Are the PDFs uploaded to a server?
No. The PDF contents are processed in your browser. The JavaScript library itself loads from a public CDN.