Every few months my dad has to submit documents to his bank. Pension stuff. They want his CNIC, pension letter, last bank statement, and a signed form — all in one PDF. Every single time he sends them as 4 separate attachments and the bank emails back saying “please combine into one file.”
Every single time he calls me. “Beta, can you make these into one file?” Yes dad. For the fifth time. Yes I can.
Merging PDFs is probably the thing I do most often for other people. It’s dead simple but somehow nobody knows how to do it. So here we go.
How to merge PDFs
Open convertkr.com/merge-pdf. Drop all your files in. They show up as a list. Drag them into the order you want. Click merge. Download one combined PDF.
That’s literally the whole process. No signup. No “you can merge 2 files for free, pay for more.” Just merge however many files you want.
For my dad I usually go: CNIC first, pension letter second, bank statement third, signed form last. The bank has never complained about the order but I like to keep it logical.
The order matters more than you think
Most people just throw files in randomly and merge. That works if nobody cares about the order. But some places are specific.
Embassies want documents in a specific sequence. Universities give you a checklist and expect you to follow it. Courts want petitions followed by evidence followed by supporting documents. If you merge them in the wrong order, you might have to redo it.
The merge tool shows you thumbnails of each file and lets you drag them around. So you can see what’s first, what’s last, and rearrange before merging. Saves the hassle of merging wrong and having to reorganize after.
I learned this the hard way when a friend’s visa application came back with a note saying “documents not in required order.” He’d merged them alphabetically by filename. passport.pdf came after bank-statement.pdf because P comes after B. Nobody thinks about that until it bites you.
Situations where I’ve needed this
Bank submissions. My dad’s situation. Banks love asking for “one consolidated PDF.” Pension documents, loan applications, account opening forms — they always want everything in one file. I’ve done this for my dad, my uncle, and two neighbors.
Job applications. My brother applied for a government job. The portal had one upload field — “attach all documents.” Not multiple upload buttons. One. He had his CV, degree, transcripts, CNIC, domicile, and experience letters as separate files. I merged them in the order the job posting listed and he uploaded the single PDF. Got shortlisted btw.
University assignments. A friend’s professor wanted the assignment, the references, and a plagiarism report all as one PDF. Three separate files into one. She’d been copy-pasting everything into one Word document and then exporting as PDF. That’s so much extra work when you can just merge the PDFs directly.
Invoice bundles. A shopkeeper I know sends monthly invoice bundles to his distributor. 15-20 invoices per month, each as a separate scan. He used to email them as 20 attachments. The distributor told him to stop doing that. Now he merges them into one file and emails one attachment. The distributor is happy and my friend doesn’t have to attach 20 files one by one.
Medical records. When my grandmother had to see a specialist, we needed to bring all her previous reports. Blood tests from one lab, X-rays from another, prescription from her regular doctor — all separate PDFs. I merged them chronologically so the specialist could see the timeline. He actually commented that the file was well-organized. Thanks, I do what I can.
Things people mess up
Merging images instead of PDFs. Someone once sent me 6 JPG photos and asked me to “merge them into one PDF.” That’s not merging — that’s converting images to PDF. Different tool. If you have images, use image to PDF first to convert them, then merge if needed. Or just use the image to PDF tool directly since it combines multiple images into one PDF anyway.
Not checking the final file. Merge, download, send. Never opened the merged file to check. Then the recipient calls saying page 4 is upside down. Or there’s a blank page in the middle. Or the wrong file got included. Always scroll through the merged PDF once before sending. Takes 30 seconds.
Merging password-protected PDFs. If one of your PDFs has a password, the merge tool can’t read it. You’ll get an error or the file just won’t load. Remove the password first, then merge.
Huge file sizes after merging. If you merge 10 high-resolution scans, the combined file can be massive — 50-80MB. Too large to email. After merging, run it through the PDF compressor. I do this almost every time for my dad’s bank documents. Merge first, compress second. The file goes from 30MB to 3-4MB and looks exactly the same.
Why not use Word or Google Docs?
People ask me this sometimes. “Can’t I just open all the PDFs in Word and combine them?”
No. Well, technically you can open A PDF in Word. But Word converts the PDF to an editable document and in the process it absolutely destroys the layout. Fonts change, images move, tables break, page breaks shift. I’ve tried this exactly once. The 3-page bank statement turned into a 5-page mess with random spaces everywhere. Never again.
A proper merge tool copies the pages exactly as they are — no conversion, no reformatting. Page 1 of file A stays exactly as it was. Page 1 of file B stays exactly as it was. They just end up in the same PDF. That’s it.
FAQ
Is there a limit on how many files I can merge?
No artificial limit. I’ve merged 25+ files in one go without issues. Your browser might slow down if you throw in 100 massive PDFs but for normal use — 5 to 30 files — it works fine.
Can I merge PDFs with different page sizes?
Yes. If one PDF is A4 and another is Letter size, they’ll merge fine. Each page keeps its original size. The result is a PDF with mixed page sizes which is perfectly valid. Viewers handle it fine.
Does the quality change?
No. Merging copies pages as-is. No recompression, no quality loss. The merged file is essentially the same data, just in one container instead of multiple.
Can I merge other file types — like a Word doc and a PDF?
The merge tool takes PDFs only. If you have a Word document, export it as PDF first (File → Save As → PDF in Word), then merge. Same for PowerPoint, Excel, or any other format — convert to PDF first.
Need to combine PDFs? Open the merge tool — drop your files, arrange the order, merge, done.