Image to PDF Converter
PNG and JPEG only. Those are the two formats the PDF format itself can embed.
Images become pages in the order you selected them.
The image to PDF converter combines PNG and JPEG images into a single multi-page PDF, one image per page, in the order you select them. The PDF is assembled in your browser. The images are never uploaded, which matters for scanned documents.
How it works
- PNG and JPEG only. Those are the two raster formats the PDF specification can embed directly; anything else must be re-encoded first, which would lose quality without warning.
- Fit mode makes each page exactly the size of its image, so nothing is scaled and nothing is cropped.
- A4 and Letter modes centre the image on a standard page, scaled to fit while keeping its proportions.
- Images are embedded at their original resolution, the PDF contains the same pixel data as the source files.
PDF page dimensions are measured in points, where 72 points is one inch. A4 is 595.28 by 841.89 points and US Letter is 612 by 792, which is why the two are visibly different shapes.
Examples
Scanned pages at their native size
Images
5 JPEGs
Page size
Fit each page to its image
Result
A five-page PDF with no scaling or white margins
Fit mode suits scans and screenshots, where any scaling either crops content or adds borders.
Photos on A4
Images
3 photographs
Page size
A4, image centred
Result
A three-page A4 PDF with each photo centred and proportionally scaled
Use this when the PDF will be printed, since a fit-to-image PDF produces pages that no printer tray matches.
Frequently asked questions
Why are only PNG and JPEG accepted?
Because those are the two raster formats a PDF can embed without re-encoding. WebP, GIF and others would have to be converted to one of them first, which silently costs quality. Converting them yourself first makes that trade-off visible.
Which page size should I choose?
Fit-to-image for scans and screenshots you will read on screen, since it avoids both cropping and margins. A4 or Letter if the PDF will be printed, because a page sized to a phone screenshot will not match any paper tray.
Are the images compressed further?
No. They are embedded at their original resolution and compression, so the PDF is roughly the sum of the input file sizes. Compress the images before converting if the result needs to be smaller.
Are my files uploaded?
No. The PDF is assembled in your browser using pdf-lib, and the download comes from memory. Nothing is transmitted, which is the point when the images are scanned documents.