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Converts on your device — your PDF is never uploadedConvert PNG to PDF — Lossless, No Upload
Turn one PNG or a whole stack of them into a single PDF, with every pixel preserved. PNGs are embedded using lossless compression, so screenshots, diagrams and charts stay exactly as sharp in the document as they were on screen. Built in your browser — nothing uploaded, no watermark, no sign-up.
PNG Is the Right Source for Documents
PNG was designed for exactly the content people most often turn into PDFs: screenshots, diagrams, charts, scanned line art, logos and anything with text or flat colour. Its lossless compression keeps hard edges perfectly crisp, where JPEG’s lossy compression softens them slightly — a difference you notice most on letterforms and thin lines.
The trade-off is size. A detailed PNG can be several times larger than the equivalent JPEG, and that carries into the PDF.
| Content | Best source | Why |
|---|---|---|
| Screenshots, UI captures | PNG | Text and edges stay razor sharp |
| Diagrams, charts, line art | PNG | Flat colour compresses well and stays clean |
| Photographs | JPG | Visually identical at a fraction of the size |
| Scanned documents | Either | PNG for crispness, JPG for smaller files |
Transparency Becomes White
Worth knowing before you convert: a PDF page has a white background, so any transparent region in your PNG shows as white in the document. The image data is preserved intact, but the page itself is not transparent. If the artwork needs to sit on a coloured background later, keep the PNG and place it in your design tool instead.
Keeping the File Manageable
Because nothing is thrown away, a PDF made from PNGs is roughly the sum of their sizes. A dozen full-resolution screenshots can easily exceed 20 MB — past Outlook’s 20 MB attachment cap and close to Gmail’s 25 MB.
Two ways to fix that: switch on re-compression here, which converts the pages to JPEG internally and usually cuts the file by 80% or more; or resize the images first with the Image Resizer, since a 4K screenshot holds far more detail than an A4 page can print.
Frequently Asked Questions
How do I convert PNG to PDF?
Drop your PNG files in, arrange the thumbnails into page order, pick a page size, then press Create PDF. Each PNG becomes one page. Everything runs in your browser with no upload.
Does PNG to PDF lose any quality?
No. PNG is a lossless format and it is embedded into the PDF with lossless Flate compression, so every pixel survives exactly. Nothing is re-encoded unless you deliberately switch on re-compression to shrink the file.
What happens to a transparent PNG?
The transparent areas appear white, because a PDF page has a white background. The image data itself is preserved, but PDF pages are not transparent the way a PNG is. If you need transparency in the final artwork, keep the PNG.
Why are my PNG-based PDFs so large?
Because PNG is lossless, and screenshots or diagrams full of fine detail simply need a lot of data. A page of dense text at full resolution can run to several megabytes. Switching on re-compression converts the pages to JPEG internally and typically cuts the file by 80% or more.
Is PNG or JPG better for making a PDF?
PNG for screenshots, diagrams, charts, logos and anything with sharp text or flat colour - it stays perfectly crisp. JPG for photographs, where it is visually identical and far smaller. Mixing both in one PDF is completely fine.
Can I combine many PNGs into one document?
Yes. Add as many as you like; each becomes a page, in whatever order you arrange the thumbnails. There is no file-count limit.
Will screenshots be readable in the PDF?
Yes, and PNG is the right choice for them. Because nothing is re-compressed, text in a screenshot stays exactly as sharp in the PDF as it was on screen - which is not true of converters that re-encode everything as JPEG.
Are my files uploaded?
No. The PDF is built inside your browser and your images never leave your device.