PDF Merge

Merging PDFs combines two or more documents into one file, in the order you choose. ToolJiffy does it entirely in your browser: add your files, drag them into the right sequence, and download a single combined PDF. Nothing is uploaded, there is no sign-up, and there is no page or size limit.

Why merge PDF files on your own device?

Combining PDFs is one of the most routine document jobs there is. People assemble monthly reports from separately exported chapters, bundle a CV with certificates and a cover letter, group scanned receipts before a tax filing, and package signed pages back into a single contract. The awkward part is that most online merge tools send your files to a server first, which means your contracts, payslips, and identity scans sit on somebody else's infrastructure to perform a task your own laptop can finish in under a second.

How browser-based PDF merging works

ToolJiffy uses pdf-lib, a well-maintained MIT-licensed JavaScript library, to read and rebuild PDF structures locally. Each file you add is parsed straight away so the tool can show you its real page count and catch problems early. When you click merge, the pages of every valid document are copied in list order into a brand-new PDF, which is then handed to your browser as a download. Standard content survives intact: text, vector drawings, raster images, and embedded fonts.

Getting the page order right

The numbered list is the source of truth. Drag a card or use its arrows to move a document earlier or later, and remove anything you added by mistake. The button shows the combined page total before you commit, which is a quick sanity check that you picked the right files. If you need to rearrange pages rather than whole files, merge first and then open the result in Organize PDF, which gives you a drag-and-drop page grid.

ToolJiffy compared with cloud merge tools and desktop software

Tips for merges that work first time

1. Remove password protection before adding a file. Encrypted documents are flagged and skipped.
2. Check that every file is a genuine PDF rather than a renamed Word or image file.
3. If a merge fails, add files one at a time to identify the corrupted document.
4. Fill in and flatten any interactive forms first, since form fields are not carried across.
5. Merging photos or scans? Convert them with JPG to PDF first, then merge.

Common merge jobs, and the order that works

A job application usually reads best as cover letter, then CV, then certificates, then references, because reviewers scan top to bottom. A tax or expense bundle is easier to audit when receipts run in date order behind a one-page summary. Scanned paperwork often arrives as one file per page from a phone scanner app, so the fix is simply adding them in shooting order and merging once. For a report assembled from chapters, put the title page and contents first, then chapters in sequence, then appendices. Whatever the job, sorting the list before you merge is far quicker than fixing page order afterwards.

What to do after merging

A combined document often needs one more pass. If the merged file is large because it contains scans,compress it to bring the size down for email. If you assembled a long report,add page numbers so the continuous document reads properly. And if you merged more than you needed, split the result back into the sections you actually want to send.