How do I combine multiple JPG images into one PDF?

Open the JPG to PDF tool, add all your images, drag them into the right order, choose A4 and create the PDF. Everything happens in your browser.

How do I keep a combined PDF under 1 MB?

Divide the limit by the number of pages to get a per-page budget, for example about 158 KB each for 6 pages, then resize each page to around 1240 pixels wide with medium quality.

What page size should a PDF for a government form be?

A4 is the standard in India and the safest choice. It keeps all pages the same size and prints correctly.

In what order should I put my certificates?

Follow the order given in the notice. If none is given, go from oldest to newest: Class 10, Class 12, graduation, then postgraduate and other qualifications.

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How to combine certificate photos into one PDF under a size limit

Updated 11 October 2026

JPG to PDF →

Many application portals give you one upload box for a whole set of documents: "upload all educational certificates as a single PDF, maximum 1 MB". If you have taken a photo of each certificate, you need to combine them into one file, in the right order, under the limit. Here is how to do that without guesswork.

Step 1: Collect and check your photos

Use photos taken with a scan app where possible (see scanning documents with your phone). They are already cropped and straightened.
If your phone saved HEIC files (common on iPhone), convert them first with the HEIC to JPG converter in Safari on the iPhone or Mac they came from; see also HEIC to JPG on iPhone.
Delete blurry duplicates. One clear photo per page is all you need.

Step 2: Decide the page order

Officers check documents against a list, so follow the order in the notice if it gives one. If not, a sensible order is:

Class 10 certificate or mark sheet (often used as date-of-birth proof)
Class 12 mark sheet
Graduation mark sheets, oldest semester or year first
Degree or provisional certificate
Postgraduate documents, then any professional qualification

Keep the front and back of the same certificate together. In our JPG to PDF tool you can drag pages to reorder them before creating the file.

Step 3: Choose A4 and fit to page

A4 (210 × 297 mm) is the standard paper size in India and the safest page size for official PDFs. Choosing A4 means every page in the PDF is the same size, even if your photos were different shapes. The image is scaled to fit inside the page with a small margin, so nothing is cut off. If a certificate is landscape (wider than tall), it will either sit smaller on a portrait page or you can rotate it first so it fills the page.

Step 4: Work out a per-page budget

This is the part most people skip, and then wonder why the PDF is 6 MB. The PDF's size is roughly the sum of its page images plus a small overhead. So set a budget per page.

Worked example

Limit: 1 MB for all educational documents. You have 6 pages (10th, 12th, four semester sheets).

Take a margin: aim for about 950 KB, not 1024 KB. Some portals treat 1 MB as 1,000,000 bytes, and the PDF wrapper adds a few kilobytes. See KB and MB explained.
Divide: 950 KB ÷ 6 pages ≈ 158 KB per page.
Your phone photos are about 3 MB each, so each needs to shrink about 20 times. That sounds like a lot, but it is easy: a 12-megapixel photo is far more detail than an A4 page needs.
Resize each page to about 1240 pixels wide (roughly 150 DPI for A4) and use medium JPEG quality. A greyscale or clean colour page of that size typically comes out between 80 and 180 KB.
Build the PDF, check its size, and adjust if needed.

Limit	Pages	Target total	Budget per page
200 KB	2	190 KB	about 95 KB
500 KB	4	475 KB	about 118 KB
1 MB	6	950 KB	about 158 KB
2 MB	10	1.9 MB	about 195 KB

If one page is much denser than the others (for example a mark sheet with a coloured background), it will use more of the budget. That is fine as long as the total fits.

Step 5: Make it fit if it is still too big

Compress the finished PDF. Run it through Compress PDF or a fixed preset like compress PDF to 500 KB.
Shrink the images first. Use compress image to 100 KB on each photo, then combine them.
Switch to greyscale unless colour is required.
Remove unnecessary pages, such as blank backs of certificates.

Step 6: Final checks

Open the PDF and count the pages. Is everything there, in order, the right way up?
Zoom to 100% on each page and read the name, roll number and marks.
Check the file size in your file manager's details or properties view. Our PDF basics guide shows how on phone and PC.
Name the file clearly, for example educational-certificates.pdf.

Common mistakes

Uploading one PDF per certificate when the form wants a single combined file, or the reverse. Read the upload label.
Mixed page sizes that make some pages tiny when printed. A4 avoids this.
Sideways pages. Rotate before combining; officers will not rotate their screen for you.
Cutting it too fine. A file of exactly 1.00 MB may still be rejected. Leave a margin.

Everything in our JPG to PDF tool runs in your browser, so your certificates are never sent to a server.

Questions people ask

How do I combine multiple JPG images into one PDF?: Open the JPG to PDF tool, add all your images, drag them into the right order, choose A4 and create the PDF. Everything happens in your browser.
How do I keep a combined PDF under 1 MB?: Divide the limit by the number of pages to get a per-page budget, for example about 158 KB each for 6 pages, then resize each page to around 1240 pixels wide with medium quality.
What page size should a PDF for a government form be?: A4 is the standard in India and the safest choice. It keeps all pages the same size and prints correctly.
In what order should I put my certificates?: Follow the order given in the notice. If none is given, go from oldest to newest: Class 10, Class 12, graduation, then postgraduate and other qualifications.