How to combine several PDFs into one for an online application

To combine documents into one PDF for application forms, put every document in PDF format, name the files in the order the form asks for, and join them with a merge tool. Our free PDF Merge does this in your browser: add the files, check the order, leave out pages you don't need, and download one PDF that is ready to upload. Then check the size against the portal's limit and compress if needed.

Many online applications, such as job circulars, university admissions, scholarships and visa or bank forms, ask for "all supporting documents in a single PDF". This guide shows how to get it right the first time.

Before you start: read the upload instructions

Spend two minutes on the form's instructions before merging anything. Look for:

• One file or several? If there is a separate upload box for each document, don't merge. Merge only when the form asks for one file.
• File type: most forms want PDF; some accept JPG for the photo and signature only.
• Maximum size: most portals state a limit per file. Note it down.
• Required order: some circulars list the documents in a fixed order. Follow it exactly.
• What to include: for example, only the last two years of payslips, or certificates from SSC upwards.

Gather and prepare each document

Collect every document as a separate file first. It is much easier to fix one small file than a finished 20-page PDF.

What you have	What to do
A PDF from the issuer (e.g. a digital certificate)	Use it as it is
Paper documents	Scan them to PDF with your phone; see how to scan documents with your phone
Photos of documents (JPG or PNG)	Turn them into a PDF with JPG to PDF
A password-protected PDF (common for bank statements)	Remove the password with PDF Unlock, using the password you know
A long PDF where you need only a few pages	Keep it; you will choose the pages while merging

Then rename the files with a number first, in the required order:

• 01-application-letter.pdf
• 02-cv.pdf
• 03-masters-certificate.pdf
• 04-bachelors-certificate.pdf
• 05-hsc-certificate.pdf
• 06-nid.pdf

With numbered names, one tap on Sort A→Z puts everything in order, and you won't mix up 10- and 2- because the tool sorts numbers naturally.

How to combine documents into one PDF for application forms

1. Open PDF Merge on your phone or computer and tap Choose PDF files. Select all the files at once. You can add up to 50 files, about 200 MB in total.
2. Sort them. Tap Sort A→Z, then look down the list. Each card shows a small preview of the first page, so you can spot a wrong file quickly. Use ↑ and ↓, or drag, to fix anything out of place.
3. Leave out unwanted pages. In the Pages box next to a file, type only the pages you need. For example, 1-2 keeps the first two pages of a long bank statement, and 2- skips a cover page. Leave the box empty to keep the whole file.
4. Check the total. The Merge button shows how many files and pages will be joined. Compare it with what you expect.
5. Merge and download. Tap Merge, then Download. The file is named after your first document with -merged added. Rename it to something clear, like rahim-uddin-application.pdf, if the form shows file names to the reviewer.

The merge happens on your device, so your NID, certificates and statements are not sent to us or anyone else. Only the final file goes to the application portal, when you upload it.

Check the merged PDF before you upload

Open the merged file and scroll through every page. Reviewers often reject applications for small mistakes, so check:

• Every required document is there, in the right order
• No page is sideways or upside down
• No blank pages from double-sided scans
• Text, stamps and signatures are readable when you zoom in
• The file size is below the portal's limit

If pages are sideways, blank or in the wrong place, open the merged file in Organize PDF Pages. It shows every page as a thumbnail you can rotate, drag or delete.

If the file is over the size limit

Merging keeps every page exactly as it is, so the merged file is about the size of all your files added together. Scanned certificates are usually the large ones.

Run the merged file through Compress PDF. For scans, Balanced or Strong usually makes the biggest difference; Strong turns each page into an image, so text is no longer selectable, which is normally fine for scanned certificates. If you need a specific target, our guide on how to compress a PDF to under 1 MB explains the DPI and quality settings. For more on why merged files grow, see why a merged PDF is so large.

Always open the compressed file and zoom in on the smallest print before uploading. A file that fits the limit but can't be read is no better than one that doesn't fit.

Common mistakes to avoid

Merging when the form wants separate files

Some forms have one box for the CV, another for certificates and another for the photo. Uploading one combined file into one box can leave the other required fields empty.

Including a locked PDF

A password-protected file can't be merged; PDF Merge will tell you which one it is. Unlock it first. Our guide on merging password-protected PDFs explains the safe way to do this.

Using a phone photo of a whole desk

Crop to the document before converting. Backgrounds make the file larger and the page harder to read.

Forgetting to keep the originals

Keep the separate files in a folder. If the portal later asks for one document again, or for a different order, you can redo it in a minute.

Quick checklist

• Upload instructions read: one file or several, size limit, order
• Every document saved as PDF, locked files unlocked
• Files named 01-, 02-, 03- in the required order
• Unneeded pages left out with page ranges
• Merged file checked page by page
• Compressed if it is over the limit, then checked again for readability