Combine PNG to PDF — Merge Multiple PNGs into One HD PDF
Drop your PNG images, drag to reorder, get one HD PDF (300 DPI). No watermark, no sign-up, files never leave your browser. Works on Windows, Mac, iPhone & Android.
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About PNG to PDF Converter
Combine PNG to PDF in seconds — Convertify’s HD PNG combiner merges multiple PNG images into one crystal-clear, multi-page PDF at up to 300 DPI. Drag-and-drop ordering, transparency preserved, batch up to 100+ images, and zero watermarks. Whether you’re combining screenshots, design mockups, scanned receipts, or product photos, the result is a single professional PDF — created entirely in your browser, so your images never touch a server.
Why Use Convertify's PNG to PDF Converter?
300 DPI Output
Sharp, presentation-grade PDF from PNGs
Transparent PNGs OK
Handles alpha-channel images cleanly
Browser-Only
PNGs never touch our servers
Multi-Image Merge
Drop dozens at once into one PDF
Common Use Cases
- 1Combine multiple screenshots into one PDF for documentation or bug reports
- 2Merge design mockups (Figma exports, app screens) into a single client-ready PDF
- 3Combine scanned receipts saved as PNG into one tax-ready PDF
- 4Bundle product photos into a multi-page PDF catalog
- 5Stitch chapter pages or comic panels into a single readable PDF
- 6Combine assignment screenshots into one PDF for school upload portals
Convertify processes all files directly in your browser — nothing is uploaded to any server. Your documents stay private and secure on your device at all times.
The complete guide to PNG to PDF Converter
Last updated May 8, 2026Combining PNG screenshots, design exports, or scanned pages into a single PDF is a common task that most online tools handle poorly — they upload your images, add a watermark, and limit you to 5 files at a time. Convertify's PNG to PDF combiner runs entirely in your browser, supports unlimited PNGs, preserves transparency-aware backgrounds, and renders at up to 300 DPI so the output is print-grade.
The conversion uses PDF-Lib's native `embedPng` so alpha channels are handled correctly — transparent areas come through without weird black backgrounds (a frequent failure mode in cheap converters that flatten through JPEG first).
If you've used iLovePDF or Smallpdf for the same task, the difference here is that the file size cap is your browser's RAM (so multi-hundred-MB image sets work), and there's no watermark on the result.
How PNG to PDF Converter on Convertify compares
| Feature | Convertify | Typical online tool |
|---|---|---|
| Files uploaded | Never | Yes |
| Number of PNGs | Unlimited | 5–15 on free tier |
| Output resolution | Up to 300 DPI | 72–150 DPI |
| Transparency handling | Native PNG embed | JPG flatten |
| Watermark | None | Often added |
| Reorder before convert | Drag-and-drop | Filename order only |
| Sign-up required | No | Often |
Step-by-step: how to use PNG to PDF Converter
- 1
Drop your PNG images
Click the upload zone or drag and drop. You can add as many PNG files as your machine can hold in memory — typical laptops handle 200+ images without issue.
- 2
Reorder if needed
Drag thumbnails to set the page order. The first image becomes page 1, the second image page 2, and so on. This is especially important for design portfolios or step-by-step guides where order matters.
- 3
Click Convert
PDF-Lib creates a new PDF, embeds each PNG at its original resolution, and adds one page per image sized to the image dimensions. The whole pass happens in JavaScript on your CPU.
- 4
Download the PDF
The result is a multi-page PDF (one page per PNG) with no watermark, ready to email, print, or upload to any portal.
Real-world scenarios
Design portfolios — Figma / Sketch exports
Designers exporting frames as PNG often need a single PDF for client review or job applications. Drop all PNG exports, drag to set the narrative order (intro → research → wireframes → final), and convert. The PDF is print-quality at 300 DPI and ready for resume attachments.
Step-by-step guides and tutorials
Internal training docs built from screenshots (annotated with arrows in a tool like Snagit) often live as PNG files. Combining them into a PDF makes sharing simpler than zipping the images, and recipients can scroll through pages naturally.
Scanned book pages and old documents
Cameras and phone scanner apps that output PNG (rather than PDF) leave you with a folder of one-page images. PNG to PDF gives you a single archive-friendly file without re-uploading the scans to a third party — important for genealogy, legal, and personal records.
Receipts and proof-of-purchase bundles
Many e-commerce sites email PNG receipts (or you screenshot them). Bundling them into a single PDF is the easiest way to submit expense claims to HR / accounting tools that expect a PDF rather than a ZIP of images.
Troubleshooting and edge cases
My PNG had a transparent background — why is the PDF page white?⌄
PDF pages don't support real transparency; what you're seeing is the default white PDF page color showing through. To preserve a coloured background, fill it in your image editor before converting. The image data itself, including alpha, is still embedded.
The PDF is huge — much bigger than the PNGs combined.⌄
PNG is lossless; embedding lossless images in a PDF preserves all that data. For a smaller output, run the result through Compress PDF afterwards, or convert PNGs to JPG first if losslessness isn't needed.
Some pages are landscape and some portrait — can I make them all the same?⌄
Convertify sizes each page to the source image, so portrait PNGs produce portrait pages and landscape PNGs produce landscape. To force a uniform page size, resize all PNGs to the same dimensions before converting (use the Resize Image tool first).
It says it can't read one of my files.⌄
The most common cause is a file that's actually a JPG renamed to .png. Double-check the original format — Convertify validates magic bytes, not just file extensions, so genuine PNGs always work but mis-labeled files won't.
How to Convert PNG to PDF - Step by Step Guide
Upload your PNG images
Drag and drop, or tap to select, all the PNG files you want to combine. You can add more at any time before converting.
Reorder the pages
Drag the thumbnails to set the exact page order in the final PDF.
Click Convert and download
Hit Convert. Your single multi-page HD PDF downloads instantly — no watermark, no sign-up, no upload to any server.
Frequently Asked Questions about PNG to PDF Conversion
How do I combine multiple PNG files into one PDF?
How do I merge PNG to PDF for free without a watermark?
Is the merged PNG to PDF output HD (high resolution)?
Does it preserve PNG transparency in the PDF?
Can I combine 50 or 100 PNGs into a single PDF?
Does combining PNG to PDF work on iPhone and Android?
Will the combined PDF be small enough to email?
Is it safe to upload sensitive PNGs (IDs, scans, screenshots)?
Specific guides for common situations
Step-by-step walkthroughs for the most common reasons people use this tool.