Choose PNG Images
or drop .png files here
PNG only · Up to 50 images
Free · Unlimited · Transparency preserved · All processing in your browser
Convert PNG to PDF Online Free
Turn one or more PNG images into a professional PDF document — instantly, in your browser, with no file size or page limits. Because PNG is natively supported by pdf-lib, your images are embedded directly with no re-encoding — keeping every pixel and every transparency layer intact.
All conversion happens locally in your browser — your files are never uploaded to any server. Need to convert a different format? JPG to PDF accepts JPEG images, and WebP to PDF handles modern WebP files. Want to go the other direction? PDF to PNG converts your PDF pages back to lossless PNG images.
Why Convert PNG to PDF?
- Universal Compatibility: PDFs open on every device, OS, and printer — PNG is not universally supported by email clients and older software
- Transparency Preserved: PNG alpha channels are embedded directly into the PDF with no quality loss
- Multi-Page Documents: Combine dozens of screenshots, mockups, or diagrams into one paginated, shareable PDF
- Professional Sharing: Send design work, reports, or UI screens as a single PDF rather than a folder of PNG files
- Print-Ready: PDF is the standard format for printing; PNG files cannot be sent directly to most printers
- Lossless Embedding: No re-encoding means zero quality degradation compared to JPEG-based conversion pipelines
How to Convert PNG to PDF Online
- 1Click "Choose PNG Images" or drag and drop your .png files into the upload area
- 2Add up to 50 images — they will appear as pages in the order uploaded
- 3Click "+ Add More Images" to append additional files at any time
- 4Select your page size: Fit to Image, A4, or US Letter
- 5Click "Convert to PDF" — the conversion runs entirely in your browser
- 6Your PDF downloads automatically as astrapdf_converted.pdf
Page Size Options Explained
Fit to Image
Each PDF page matches the exact pixel dimensions of the PNG image. No resizing, no cropping — best for preserving original aspect ratios and for digital viewing or archiving.
A4 (210 × 297 mm)
Standard international paper size. The image is scaled to fit within A4 and centered. Best for printing in Europe, Asia, and most of the world.
Letter (8.5 × 11 inch)
Standard US paper size. The image is scaled to fit letter dimensions and centered. Ideal for printing in North America.
PNG to PDF Converter Features
Completely Free: No image limits, no account required
No Re-Encoding: PNG embedded directly — zero quality loss
Transparency Preserved: Alpha channels carry through to the PDF
Batch Conversion: Combine up to 50 PNG images into one PDF
Three Page Sizes: Fit to Image, A4, and US Letter
Browser-Based: Your PNG files never leave your device
Tips for Converting PNG to PDF
Upload images in the order you want them to appear — the PDF pages follow the list exactly
Use "Fit to Image" for UI screenshots, mockups, and design assets where original pixel dimensions matter
Choose A4 or Letter if you plan to print the final PDF on standard paper
PNG files with transparency work perfectly — the alpha channel is preserved in the output PDF
If the resulting PDF is too large, run it through our Compress PDF tool to reduce file size without visible quality loss.
Need to combine the converted PDF with other documents? Use our Merge PDF tool to join multiple PDFs into one file.
Frequently Asked Questions — PNG to PDF
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