How to Convert Images to PDF (and Back) for Free

Converting between images and PDFs comes up more often than it seems — turning a stack of scanned receipt photos into one shareable PDF, or pulling a specific diagram out of a PDF report as a standalone image for a slide deck. Both directions are simple operations once you know what actually happens to quality and file size along the way.

Images to PDF: what actually happens

Converting JPG or PNG images into a PDF doesn't re-encode or compress the images — each one is embedded into its own page at its original resolution and quality. The PDF becomes, essentially, a container around your images rather than a transformation of them. This matters if you're converting scanned documents: the text-as-pixels stays exactly as sharp (or blurry) as the original photo, since nothing about the image data itself changes.

Step-by-step: images to PDF

1. Open Image to PDF — runs locally, nothing uploaded.
2. Add your JPG and/or PNG files — mixing both formats in one PDF works fine.
3. Drag to arrange them in the order you want as pages.
4. Convert and download — each image becomes one page, in that order.

PDF to images: pulling pages back out

The reverse direction — extracting PDF pages as standalone images — is just as common: grabbing a chart from a report for a presentation, or converting a scanned document's pages into images to drop into a design tool that doesn't accept PDFs directly. PDF to JPG converts every page of a PDF into its own JPG automatically, downloadable individually or as a zip if you're pulling out a lot of pages at once. If you need transparency support or lossless quality instead — say, extracting a logo or diagram with a transparent background — PDF to PNG is the better pick, since JPG doesn't support transparency and always applies some compression.

JPG or PNG — which should you actually use?

• JPG: smaller file size, good for photos and scanned pages where minor compression artifacts don't matter. Doesn't support transparency.
• PNG: lossless, supports transparent backgrounds, but produces noticeably larger files — worth it for diagrams, screenshots, or anything with sharp edges and text where compression artifacts would actually be visible.

If you're not sure which a specific PDF page needs, JPG is the safer default for photo-like content and PNG for anything with flat colors, text, or transparency requirements.

What conversion doesn't fix

A common misconception: converting a scanned image-based PDF into another image format and back into a PDF doesn't make the text inside it selectable or searchable. Conversion only changes the file's container format — the pixels stay pixels either way. If your actual goal is getting real, searchable text out of a scanned document rather than just changing its file format, that's a fundamentally different job — see the OCR guide for how to add an actual text layer.

Batch size and speed

Since everything processes locally on your device rather than a server, there's no hard limit on how many images or pages you can convert at once — a large batch of high-resolution images will simply take somewhat longer, since your own processor is doing the work rather than a server built for it. For most everyday batches (a handful of scanned pages, a few dozen photos), the difference is barely noticeable.