PNG stays lossless inside the PDF
PNG is the format of screenshots, diagrams, charts and interface designs — images with sharp edges and small text. Many converters quietly re-save them as JPEG, which adds blur and coloured noise around letters. This tool embeds each PNG without re-compression, so every pixel in the PDF is identical to your original file.
When is PNG to PDF useful?
- Screenshots as evidence — chats, payment confirmations and error messages gathered into one document.
- Design hand-off — several mock-ups in one file that a client can open without special software.
- Diagrams and charts for reports, where text must remain crisp when zoomed.
- Digital signatures and stamps saved with a clean edge.
What happens to transparency?
PDF pages have a white background, so transparent areas of a PNG appear white in the document. The transparency information itself is kept inside the embedded image.
Keeping the file small
Lossless PNG data can be large. If your PDF must fit an upload limit, either use compress PDF afterwards, or convert photos with JPG to PDF, which is more compact for photographic images. To put pages from different documents together, use merge PDF.