Merge PDF

Bring separate documents together.

Combine files in the order shown. Use the arrows to change their order.

How to use Merge PDF

1. Open your document from your device.
2. Adjust the settings and preview the result.
3. Read text results on screen or download your file. Your original remains untouched.

Local by design

Your documents are processed on your device. No account, payment or document upload is required.

Enable JavaScript to use the document workspace.

Assemble a document packet in a deliberate order

Merge PDF is useful when separate PDFs belong in one reading sequence: an application and its supporting evidence, a report and its appendices, or several related invoices. It joins pages into a new document. It does not decide which version is authoritative, remove duplicate content or reconcile conflicting page numbers. Make those decisions before creating the packet.

Start with the files you are authorised to share and keep their originals separately. Check each filename and preview enough pages to identify it. Similar names can hide different revisions. If a source is encrypted, prepare an authorised unlocked copy with the correct password first. If it is certificate-signed, preserve the signed original; assembling pages into a new file is not a way to preserve the original signature’s validation over its original bytes.

Put the files in the intended reading sequence

1. Open the PDFs from your device. The file list represents the merge order.
2. Use the ordering arrows to put the cover, main document and appendices where they belong.
3. Review the list and remove any accidentally selected file before processing.
4. Choose an output name or suffix that distinguishes the packet from its sources.
5. Create the result, download it and reopen the saved PDF.

File selection order is easy to overlook, especially when a phone’s picker sorts by recency. Do not assume that alphabetical filenames establish the final sequence. Use the list shown in the workspace as your reference. If pages inside one source need rearranging, use Organize pages on that source or on a separate merged copy.

What to review in the merged output

Add the source page counts and compare the sum with the output. Inspect the boundary between every pair of files. The last page of one appendix and the first page of the next are common places for ordering mistakes. Check the first and final pages explicitly, including intentionally blank pages that may be relevant to a printed packet.

Mixed paper sizes remain a practical consideration. A landscape drawing and a portrait letter can coexist in one PDF, but the recipient’s print settings may scale them differently. Open the output’s print preview if printing matters. Merging does not standardise every page to A4 or Letter; use an appropriate layout workflow when a consistent sheet size is required.

Review forms, links, bookmarks and other interactive features in the actual result. Page assembly should not be treated as a guarantee that every document-level feature from every source will behave as it did separately. If the packet must remain accessible or preserve a particular interactive workflow, test those requirements independently. Visual similarity is only one part of acceptance.

A useful delivery routine

For an application packet, write down the required order before merging and tick off each component as you inspect the output. If a recipient specifies a maximum size, try lossless compression on a copy after assembly. Check the complete final result again, because subsequent processing creates another deliverable. Avoid sending both originals and the merged packet unless the recipient requests them; duplicate attachments can create uncertainty about which file to read.

See the print checklist for mixed paper sizes and security controls before combining signed or protected documents.

Frequently asked questions

Does merging change my original files?

No. The tool creates a separate result. Keep the originals for comparison and future corrections.

Can I change the order after selecting files?

Yes. Use the arrows in the file list before creating the result. Inspect the saved packet to confirm the sequence.

Will existing page numbers be renumbered?

Printed numbers remain part of their source pages. Add a deliberate numbering scheme separately if the packet needs one continuous sequence.

Can I merge password-protected PDFs directly?

Prepare an authorised unlocked copy using the correct password when the input cannot be opened. Merging is not password recovery.

Does the merged file preserve certificate signatures?

Do not rely on it for that purpose. Preserve signed originals and follow the recipient’s signing and document-assembly requirements.