PNG to PDF Converter
Convert PNG images to a single PDF: one image per page, at native size or fitted to A4/Letter. JPG files work too. Free, no sign-up, and everything runs in your browser.
The PDF is assembled locally with pdf-lib. Images are embedded as-is, with no re-compression.
How the PNG to PDF converter works
Each image you add becomes exactly one page of the output PDF, in the order the files were added. The list below the upload area shows that order and lets you remove mistakes before converting. When you click Convert, the tool embeds your original PNG or JPG bytes directly into a new PDF document using pdf-lib, so there is no quality loss: what goes in is what comes out, pixel for pixel.
Two layout modes cover the common cases. Native image size makes every page the exact size of its image (mapped at 96 DPI, so a 1200×900 pixel PNG becomes a 900×675 point page), which keeps screenshots and scans at their true dimensions. Fit to page centres each image on a standard A4 or Letter sheet with a margin you choose, scaling oversized images down while preserving their aspect ratio. Images smaller than the page are never enlarged, so nothing gets blurry.
Because the assembly happens entirely on your device, your images are never uploaded to a server. That also means there is no file-count quota, no watermark and no waiting for a queue.
Tips for best results
| Situation | What to do |
|---|---|
| Archiving screenshots or scans | Use native size mode; each page matches the image exactly |
| Printing or emailing as a document | Use fit mode with A4 or Letter so every page prints predictably |
| Wrong image in the list | Click its × button before converting; order follows the list |
| Transparent PNG logos | Transparency is preserved: PNGs are embedded untouched |
| Very large batch (100+ images) | Split into a few PDFs; browser memory is the practical limit |
Frequently asked questions
How do I convert PNG to PDF?
Drop one or more PNG (or JPG) files onto the upload area, choose a page size mode, and click Convert. You get a single PDF with one image per page, in the order you selected the files. Remove buttons let you fix the list before converting.
Will my PNG lose quality in the PDF?
No. Your PNG bytes are embedded into the PDF exactly as they are; nothing is re-compressed or re-encoded. Native size mode maps one pixel to one point at 96 DPI, so the image appears at its real pixel dimensions.
What is the difference between native size and fit to A4/Letter?
Native size makes each PDF page exactly the size of its image (at 96 DPI), which is ideal for archiving screenshots and scans. Fit mode places every image centred on a standard A4 or Letter page with a margin, scaling down large images to fit while preserving aspect ratio; small images are never enlarged. Fit mode is the better choice for printing.
Are my images uploaded to a server?
No. The PDF is assembled locally in your browser with the pdf-lib library. Your images never leave your device, and the tool keeps working offline once the page has loaded.
Is there a limit on how many PNGs I can combine?
There is no fixed limit. Dozens of images are fine; hundreds may get slow simply because everything happens in your browser's memory. Very large batches are best split into a few PDFs.