OmniTools

PDF Merger & Photo to PDF

Combine PDFs and photos into one PDF in the order you set — nothing leaves your browser.

Basis: PDF pages are copied at their own size with pdf-lib; photos are centred on an A4 (595×842 pt) or US Letter (612×792 pt) page, or placed on a page of their own size. A4 follows ISO 216 and Letter follows ANSI/ASME Y14.1. Files are never sent to a server·2026-11-02 verified·Editorial policy

Before you rely on this

Password-protected PDFs cannot be merged — remove the password first. A digitally signed PDF loses its signature validation once merged, so submissions that need the signed original should include it separately. Bookmarks and fillable form fields may not survive, and merging many very large files can run a phone out of memory.

Tool Overview & Key Purpose

Combines several PDFs and photos into a single PDF in the order you set — bundling photos of IDs, certificates and receipts into one document, or gathering a contract that arrived in pieces. Because these are often papers you would rather not upload anywhere, the files are merged inside this browser and never sent to a server.

Step-by-Step Usage Instructions

1STEP 1

Drop PDFs and photos in or tap to choose them — up to 30 files, 100 MB each.

2STEP 2

Set the order with Up and Down, add anything missing with “Add more”, and take out mistakes with Remove.

3STEP 3

Choose the page for photos — A4, US Letter, or the photo’s own size. PDFs keep their original page size.

4STEP 4

Press merge, check the page count and size, then save merged.pdf.

Real-World Scenarios & Practical Cases

3 Practical CasesScenario #1

One file for a visa or job application

A passport photo, a two-page employment letter PDF and a one-page bank statement PDF, in order and fitted to A4, become a single four-page PDF — ready for a form that accepts only one file.

If the signed original is required, submit it separately as well — merging breaks digital signature validation.Scenario #2

Receipt photos for an expense claim

Eighteen receipt photos from a month, in date order and fitted to the page, make an 18-page PDF the finance team can page through easily.

If the file gets large, shrink the photos’ long edge to about 1,600 px with the image compressor first.Scenario #3

Papers for the US or Canada

Most North American offices use US Letter (8.5 × 11 in). Fitting photo pages to Letter means they print at the recipient’s end without scaling.

Pages from an existing A4 PDF do not become Letter; the setting applies to photo pages only.How files are combined

PDFs: every page of each file is copied at its own size and appended.
Photos (A4 or Letter): with a 28 pt (about 1 cm) margin, each photo is scaled down in proportion to fit and centred. Small photos are not enlarged.
Photos (own size): the photo’s pixel dimensions become the page size.
A4 = 595 × 842 pt (210 × 297 mm), US Letter = 612 × 792 pt (8.5 × 11 in). 1 pt = 1/72 in.

Pro Tips & Key Considerations

Reordering or removing a file clears the result — press merge once, at the end.JPG and PNG go in as they are; other formats such as WebP or GIF are converted once to JPG at quality 92.Merging several very large PDFs on a phone can run out of memory. Merge them in smaller groups, then merge the results.

Frequently Asked Questions (FAQ)

Sources & References

Library of Congress — PDF (Portable Document Format) Family pdf-lib — Create and modify PDF documents in any JavaScript environment