Signature and Documents

How to Combine Certificates and Scans into One PDF for an Application

One tidy PDF in the right order is easier for a reviewer to read, and less likely to be rejected, than six loose files.

By Sumit Sengar | Last reviewed October 2026 | 4 min read

When one PDF is better than many files

Some portals ask for each document separately, with its own slot. Others, especially for recruitment, ask for a single PDF containing "all certificates". When the form asks for one file, a clean merge is part of making a good impression: the reviewer opens one document and finds everything in a logical order.

If the form has separate slots, do not merge. Upload each document in its own slot, and use the steps below only to prepare each file.

Step 1: Decide the order before you scan

Write the order on paper. A common sequence for a job application is:

  1. Identity proof
  2. Highest qualification certificate and marksheet
  3. Earlier qualification certificates, most recent first
  4. Caste, category or domicile certificate, if applicable
  5. Experience letters, most recent first
  6. Any other document the notice asks for

If the notice lists the documents in a particular order, follow the notice, not this list. Reviewers often tick them off in the order printed.

Step 2: Prepare each page

  • Photograph or scan each page flat and straight. See phone scanning tips.
  • Crop away the table or floor around the page.
  • Rotate pages so the text is upright. A sideways page costs the reviewer time and may be marked unreadable.
  • Keep file names in order, such as 01-identity.jpg, 02-degree.jpg, 03-marksheet.jpg. The names make the order obvious later.

Step 3: Merge and check the order

In the ApplyReady image to PDF tool, add all the images, then use the up and down buttons on each row to arrange the pages. Choose A4, pick a margin that does not cut off the edge of a document, and select an image quality that balances size and clarity. Because the processing happens in your browser, your certificates are not sent anywhere.

Check the page list once more before you convert. Reordering after conversion means starting again.

SettingRecommended for documents
Page sizeA4, unless the portal states another size
OrientationAutomatic, so a landscape certificate is not squeezed onto a portrait page
MarginSmall, so the document fills the page and text stays large
QualityBalanced. Raise it only if the file is far below the limit

Step 4: Check the final file

  • Open the PDF and scroll through every page. Confirm none is blank, upside down or cut off.
  • Zoom to 100 percent on the smallest text. Dates and percentages must be readable.
  • Check the file size against the portal limit. If it is over, use the compression guide.
  • Give the file a clear name, for example Firstname_Lastname_Certificates.pdf. Avoid spaces and brackets if the portal complains about file names.
  • Keep the original images. If a portal asks you to re-upload, you can rebuild the PDF in a minute.
Over the limit even after compression? Split the documents into two PDFs, such as "Identity and education" and "Experience", and ask whether the portal allows more than one upload. Many do, even when the first field only mentions one.

Open image to PDF

Frequently asked questions

Can I combine photos and existing PDFs?

The ApplyReady image to PDF tool combines images (JPG, PNG, WebP). If you already have a PDF page, convert it to an image first or ask whether the portal accepts separate files.

What if the pages are different sizes?

Set the orientation to automatic so each page keeps its own shape on an A4 sheet, and choose a small margin so that small certificates do not look lost on a large page.

How many pages is too many?

There is no fixed number, but every extra page costs bytes and reviewer attention. Include what the notice asks for, and leave out anything extra.

Should I add page numbers or a cover sheet?

Only if the notice asks for them. A short cover page listing the contents can help in long applications, but if the file has a size limit, spend the bytes on legible documents instead.

The merged file is too large. What now?

Reduce image quality one step, reduce page count, or compress with the PDF compressor. If the limit is still too tight, check whether the portal allows more than one upload.

Is it safe to merge identity documents on a website?

Only on a tool that processes files on your device. Use the airplane-mode test described in the guide on staying safe with document uploads to confirm that a tool does not upload your files.

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