Image to PDF
Combine JPG, PNG or WebP images into one PDF — original size or fitted to A4 with print margins.
FAQ
How do I combine several images into one PDF?
Add multiple images at once, reorder them with the up and down arrows (that order becomes the page order), then click Create PDF.
Are the images compressed?
They are embedded as JPEG. Choose Original size for maximum sharpness; Fit to A4 scales them proportionally with a margin so the result prints cleanly.
Do transparent PNGs turn black?
No. Transparent areas are filled with white.
Which image formats are supported?
JPG, PNG and WebP.
About this tool
One image per page, with the list order becoming the page order — reorder or remove at any time. Assembly happens in the browser (pdf-lib is loaded on demand), nothing is uploaded, and the result downloads as images.pdf.
Every image is first converted to JPEG at quality 0.92 before being embedded. That has two consequences: transparent PNGs get a white background (so they never turn black), and screenshots of text and scans pick up mild compression artefacts — PDF can embed losslessly, but JPEG keeps a few dozen large photos from ballooning the file. For maximum sharpness choose Original size and accept the larger output.
The two page-size modes differ in a practical way: with Original size the page equals image pixels × 0.75 (converting 96dpi pixels to PDF points), and a long edge beyond 14400pt is scaled down proportionally, which is a limit of the PDF format itself. A4 is 595.28 × 841.89 pt (210 × 297 mm) with a 24pt (about 8.5mm) margin, the image scaled proportionally and centred, never cropped or stretched — mismatched ratios simply leave white space. Use A4 for printing, Original size for archiving.
Processing is sequential with a "page i of n" progress readout. An image that fails to decode is skipped and the failure count is reported at the end, so one bad file does not abort the batch. Dozens of full-resolution phone photos will be slow and memory-hungry; keep a batch to twenty or thirty.