Merge PDF files — combine PDFs in the order you choose
Combine PDFs in your browser — no upload or watermark, with file and page limits.
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PDF up to 50.00 MB · up to 20 files
Add a file to begin
How to use merge pdf
- 1Add two or more PDFs, up to the displayed batch limit. Files are initially listed in the order they were added.
- 2Use the up and down buttons beside a file to set the order. The pages from each file stay together in their original sequence.
- 3Run the merge, read the page count and file size, then download the combined document.
- 4Open it and verify page order, readability and any important links or forms. Keep the separate originals.
Why this tool, and why browser-side
Certificates, marksheets, ID proofs and bank statements are always issued as separate PDFs, but every application portal wants one file. Merging locally means you can assemble a 40-page attestation bundle in one pass.
Ordering matters more than people expect: a blended "photo + signature + ID" document that runs in the wrong sequence gets returned by document-verification desks. The workbench keeps an explicit, visible order that you control before exporting.
Sensitive bundles are exactly the files you should never hand to a random server. Here they are joined with the File and Blob APIs in the tab you already have open.
A portal may request one file for a form and its supporting documents. A local merge lets you assemble the pages without sending the files to this site.
Ordering matters when a reviewer expects a form first and evidence afterwards. The move controls let you arrange complete input files before creating the PDF.
Merging is not the same as compressing: the result can be too large for a portal and may require a separate compression step.
This tool exists for PDF documents handled in a hurry: no queue, no account, no upload, and a result you can verify on the spot. The explanation below is the same one we would give a colleague who asked how it works.
PDFs can contain text, images, fonts, forms and document properties. A structural rewrite may reduce a file, but the saving depends on its contents. Keep the original and inspect the output: a rewrite is not guaranteed to remove all identifying metadata, preserve interactive features or make a file safe.
Password-protected and encrypted PDFs are not supported by these tools. If you are authorised to do so, use your PDF reader to make an unlocked copy and try that copy instead. Preserve the original, especially if it has a digital signature.
Accepted inputs are PDF files up to 50 MB. SVG, HTML and other script-bearing formats are refused outright rather than sanitised, because a file that can execute code has no business being re-encoded — and an upload field that accepts one is a security hole rather than a feature. Several files can be queued where the workbench supports it. Batch, page and memory limits apply; check every output.
How it works under the hood
The tool copies pages into a fresh document without rasterising them. Page dimensions and rotation are retained, but document-level bookmarks, links, interactive forms and digital signatures may not survive. Verify the output and keep your originals. The tool parses each input and copies its pages into a new PDF without rendering them into images. Page sizes and rotations are copied, but document-level bookmarks, internal links, interactive form behaviour and signatures are not guaranteed to survive. Shared resources and output size vary with the files; deduplication is not guaranteed. Encrypted inputs are rejected. Pages are copied between documents at the object level, so text remains selectable, vectors stay vectors and page boxes are preserved. Files are merged in the order you arrange them, and the reader you open the result in will show exactly the page order you set — check it once, because a merge is the operation people most often discover was wrong at the worst moment.
Frequently asked questions
Can I merge PDFs with different page sizes?
Page geometry is copied per page, so mixed page sizes are possible. Check the output in a PDF viewer, especially before printing.
Why is my merged file smaller than the two originals combined?
Serialization and shared resources affect the output size. A merge is not a guaranteed compression or deduplication step, so the combined file may be larger or smaller than expected.
Do you keep a copy of my files?
No — and this is not a policy promise, it is a technical fact. There is no upload endpoint to send them to. Open your browser's Network tab while merging and you will see zero requests carrying file data.
How do I change the file order?
Use the up and down buttons beside each file. The list shows the sequence used when the merged document is made.
Can files have different page sizes?
Yes. Each page is copied with its own geometry. Check the result if you need a consistent printed page size.
Does merging compress the file?
Not reliably. Size depends on the source objects and the rewrite. If the combined PDF is too large, try compression and check readability.
Will bookmarks and internal links work?
They may not survive a page copy. Check the result in a PDF viewer before relying on navigation.
Do digital signatures remain valid?
A digital signature covers original file bytes; merging changes the document and can invalidate it. Submit signed originals separately when required.