Why this takes two steps
A merge tool combines PDF documents. A JPG or PNG is a different kind of file — a single picture with no pages — so it has to become a PDF page before it can join the others. Merge PDF accepts PDF files only, and that is why dropping a photo into it does nothing.
The workflow is therefore: turn the images into PDF pages with Image to PDF, then merge those with your existing PDFs. Both steps run in your browser, so documents and photos are never uploaded — sensible for the ID scans, receipts and personal forms that usually make up these packs.
Before starting, list the final order you want, page by page. For example: application form, passport scan, certificate, two receipts. Having the sequence written down turns both steps into a mechanical exercise and makes the final check quick.
Convert the images to PDF
Open Image to PDF and add your images. The tool accepts JPG, PNG, WebP and other common formats. If several images belong next to each other in the final document — two receipts, say — add them together and drag them into order, so they come out as one multi-page PDF.
If the images belong in different places in the final document, convert them separately: one PDF for the passport scan, another for the receipts. That gives you individual pieces you can slot into the right positions during the merge, rather than a single block of image pages that has to sit in one place.
Tidy the images first if they need it. A receipt photographed on a desk is easier to read cropped tightly with Crop Image, and a sideways scan should be turned upright with Rotate Image. Fixing them before conversion is easier than fixing pages afterwards.
Merge everything in the right order
Open Merge PDF and add your original PDFs together with the PDFs you just made from the images. Drag the files into the order from your list — the merged document follows the order shown, so this is the step that decides how the pack reads.
Give the merge tool sensible inputs. Files named IMG_4021.pdf and scan (3).pdf are hard to arrange correctly. Renaming the pieces to something like 1-form.pdf, 2-passport.pdf and 3-receipts.pdf before merging makes the order obvious and mistakes unlikely.
If an image needs to sit in the middle of an existing PDF — a photo inserted after page 3 of a report — split the report at that point with Split PDF first. Then merge in the order: report pages 1–3, the image PDF, the rest of the report. The merge guide covers ordering in more detail.
Make the page sizes look consistent
The most common reason a combined PDF looks amateurish is mismatched page sizes. Your forms are A4 or US Letter, but an image converted with Fit to image becomes a page exactly the shape of the photo — a long thin receipt becomes a long thin page, and a landscape screenshot becomes a wide one.
| Image type | Page size to choose | Why |
|---|---|---|
| Scanned document or certificate | A4 or US Letter | Matches the surrounding pages; prints correctly |
| Receipt or small photo | A4 or US Letter with a margin | Sits on a normal page instead of an odd shape |
| Screenshot or diagram | A4 or Letter, orientation Auto | Landscape images get a landscape page |
| Photos that stand alone | Fit to image | Keeps the exact shape when no matching is needed |
Match the paper size to the rest of the pack — A4 in most of the world, US Letter in North America. A small margin around image pages keeps their content away from the edge, which looks neater on screen and avoids clipping if someone prints the document.
Keep the combined file a sensible size
Phone photos can be several megabytes each, and a pack with five of them may exceed an email or upload limit. Compress or resize the images before converting them — Compress Image reduces them substantially while keeping documents readable, and that saving carries straight through into the final PDF.
If the merged PDF is still too large, Compress PDF can reduce it further. Be aware that it rebuilds every page as an image, including any pages from the original PDFs that had selectable text. For a pack where the text needs to stay selectable, compressing the images beforehand is the better route.
Check the destination’s limit before you start, not after. Knowing that a portal accepts 5 MB tells you how hard to compress the photos at the beginning, which is easier than rebuilding the whole pack at the end.
Check the final document
Open the combined PDF and step through every page against your list. Check the order, that each image page is upright, that nothing is cut off and that the smallest text on each scan is still legible. It takes a minute and catches nearly every problem.
Confirm the total page count matches the sum of the pieces. A missing page usually means a file was left out of the merge; an extra page usually means one was added twice. Both are easy to fix now and embarrassing to fix after sending.
Give the final file a clear name — your name, what it is and the date — and keep the individual pieces until the pack has been accepted. If the recipient asks you to replace one receipt, you can rebuild from the pieces in a minute rather than unpicking the merged file.
Open Merge PDFCombine your PDFs and converted images in the order you choose.
Open Merge PDF →Frequently asked questions
Can I add JPG files directly to Merge PDF?
No. Merge PDF combines PDF files only. Convert the images to PDF first with Image to PDF, then merge those PDFs with your other documents.
Why do the image pages look a different size from the rest?
Fit to image makes each page the shape of its photo. Choose A4 or US Letter when converting the images so their pages match the documents around them.
Can I put an image page in the middle of a document?
Yes. Convert the image to its own PDF, then split the document at the right point if needed and arrange all the parts in order when you merge.