How to combine PNG images into a single PDF
PNG and PDF serve different purposes. PNG is great for individual screenshots and graphics; PDF is great for sending a multi-page document, printing, or attaching to an invoice. The conversion path is one-way (you can re-extract PNGs from a PDF, but you'll lose any layout you set up). This guide walks you through merging one or several PNGs into a clean, scaled PDF — no upload, no signup, all in your browser.
Common scenarios: bundling 4 expense receipts into a single PDF for reimbursement; submitting a portfolio of UI mockups to a client; archiving a series of dashboard screenshots into a dated PDF for compliance; preparing a print-ready document from individual page exports of a design tool. All of these are tedious if you do them by hand in Word or Photoshop. The Images to PDF tool does each in 30 seconds.
Step by step
Open Images to PDF
It's a dedicated tool. The conversion happens entirely in your browser via pdf-lib, no upload to a server.
Drop your PNG files
Drag and drop, paste, or pick from the file explorer. The tool accepts PNG, JPG, WebP, HEIC. Order matters: the first file becomes page 1, the second page 2, and so on.
Reorder if needed
Drag images in the preview to change their order. You can also remove a page by clicking the × on its thumbnail.
Pick page size and orientation
A4 portrait is the safe default for European workflows; US Letter for North America. Landscape is better for dashboard screenshots wider than they are tall. The tool auto-rotates pages individually if you check 'fit orientation per image'.
Set margins and download
Margins of 12–20 mm look professional. Click 'Generate PDF' and the file downloads — no watermark, no signup, no daily limit.
Convert your PNGs into a clean, multi-page PDF in 30 seconds.
Common pitfalls
- PNG transparency renders as white in the PDF. If your PNG has a transparent background and you want the PDF page to show as transparent (rare), you'll need a different tool — PDF doesn't support page-level transparency the way you'd expect.
- Very high-resolution PNGs (4K+) create heavy PDFs. If the result is over 20 MB, downscale your PNGs first with the Image Crop or Image Converter tool.
- Drag-and-drop ordering is per-batch. If you re-drop a file, it goes to the end. Plan your order before importing.
- PNG with text rendered as bitmap (screenshots) won't be searchable in the PDF. If you need searchable text, run the resulting PDF through PDF OCR after conversion.
FAQ
Can I convert one big PNG into a multi-page PDF?
Not directly with this tool — it's one image per page. To split a long PNG (like a webpage screenshot) across pages, slice it first with the Image Crop tool into separate PNGs, then combine them.
Does the PDF preserve image quality?
Yes — the tool embeds your PNGs as PNG inside the PDF (no re-encoding). The visible quality is identical to opening the PNG directly. The PDF file size will be slightly larger than the sum of the PNGs because of PDF overhead.
Can I add text or annotations to the PDF?
Not in the same step. Generate the PDF first, then open it in PDF Editor to add text, highlights, signatures or stamps.
Is there a maximum number of pages?
Practically, around 100 pages on a desktop browser, 50 on mobile, before memory limits kick in. For very long documents, generate two PDFs and merge them with PDF Merge afterwards.