PDF Tools
Join PDFs into one file, in the order you choose
Add the files, drag them into the order you want, and merge. Everything happens on your device — the documents never leave it, which matters when they are contracts, invoices or anything with a name on it.
Add two or more PDFs. They are joined top to bottom in the order shown, and you can reorder them before merging.
Processed in your browser. Nothing is uploaded.
- Runs in your browser
- No account required
- Free to use
- Up to 50 files
How it works
Pages are copied, not rebuilt
Each page is copied into the new document exactly as it was. Text stays selectable, links keep working and images are not re-encoded, so the result is not a photograph of your document.
Order is whatever you set
Files merge top to bottom in the order on screen, and you can move any of them before you start. The order you see is the order you get.
Nothing is uploaded
The merge runs in your browser using your own machine. There is no queue, no server, and no copy of your document anywhere but your device.
What it does
As many files as you need
Merge two documents or fifty, in one pass, with a running page count so you know what you are building.
Reorder before merging
Move any file up or down. Nothing is written until you press the button.
Original quality kept
No re-encoding, no downsampling, no watermark added to the result.
Works with big documents
Files up to 25 MB each, limited by your own memory rather than by an upload cap.
Practical advice
Getting a better result
- Name your files so they sort in the right order before you add them — it is faster than reordering afterwards.
- Merging does not compress. If the result is too large for an email, run it through the PDF compressor afterwards.
- Bookmarks and form fields from the original files are not carried across. If those matter, keep the originals.
- A PDF that will not open here is usually password-protected. Remove the password in the app that made it, then merge.
Questions
Things people ask
Is my PDF uploaded anywhere?
No. The file is read into memory in your browser and everything happens there. There is no upload endpoint, and nothing on the page that can read your content, and a Content Security Policy allows no upload destination at all.
That also means the file never sits on someone else’s server waiting to be deleted, which is the part most people are actually worried about with a contract or an invoice.
Does merging reduce the quality?
No. Pages are copied across as they are — the text stays text, and images keep the encoding they already had. The merged file is roughly the size of the originals added together.
How many PDFs can I merge at once?
Up to 50 files, each up to 25 MB. Those limits exist to keep memory use sane on a phone rather than because of anything on a server.
Why will my file not open?
Almost always a password. A PDF with an open password cannot be read without it, and this tool will not try to work around that.
The other common cause is a file that is not really a PDF — something renamed rather than exported.
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Open toolWho builds these
Free tools by day. Websites that earn their keep by trade.
KuConvert is built by KUDUY, a web design and development agency. From custom WordPress builds to SEO and e-commerce, everything they do is engineered to bring you more qualified traffic and turn it into revenue.
Web Design
Custom, conversion-focused web design that captivates visitors and turns them into paying customers. Mobile-first, fast, and built to rank.
Web Development
Custom WordPress websites built with clean code, blazing-fast performance (Core Web Vitals optimised), and enterprise-grade security.
E-Commerce
Online stores that convert visitors to customers with seamless shopping experiences.
SEO
Technical SEO, keyword research, on-page optimisation and local SEO strategies that drive qualified organic traffic.
Digital Marketing
Data-driven campaigns that deliver measurable ROI across every channel.
Branding
Memorable brand identities that stand out in any market and build lasting trust.
Website Help
One-on-one expert support for bug fixes, updates and ongoing maintenance — without a long-term retainer.
Fixed scope, no surprise invoices
Most sites ship in four to eight weeks with the scope and the price agreed up front.
SEO from day one
Search is designed into the build — structure, schema and Core Web Vitals — not retrofitted.
A team, not a ticket queue
A project manager, a designer and a developer you can actually reach.
Documents are only half the job
If the PDFs are going on a website, the site has to be worth landing on. KUDUY builds the pages around them — design, development and the SEO that gets them found.
This tool runs entirely in your browser. Your files are never uploaded.