Convert JPG to PDF

Why turn JPG images into a PDF?

A single PDF is accepted where a pile of photos is not. Upload forms for visas, rental applications, insurance claims and expense reports often take one PDF only. Converting JPG to PDF lets you photograph a multi-page document, receipt or ID card with a phone and send it as one file in the right order.

A PDF keeps the pages in order, which a folder of photos or a chat thread does not, and it opens in every browser and email app without an image viewer. It is also easier to print: one print job, consistent page sizes, and no cropped edges from photo printing presets. To add photos to an existing PDF, create a PDF from the images here and combine both files with Merge PDF.

Which page size, orientation and margin should you choose?

Choose Fit to image for screen viewing and A4 or US Letter for printing. Fit to image makes each page exactly the shape of its picture, with the long side capped at 297 mm so pages stay a sensible size. A4 (210 × 297 mm) and US Letter (8.5 × 11 in) create uniform pages; pictures are scaled to fit and centred, never stretched or cropped.

Orientation set to Auto turns each page landscape or portrait to follow its image, so a mix of wide and tall shots wastes no space. The small margin is 10 mm and the large margin is 20 mm. A large margin leaves room for hole punching, staples or handwritten notes, while None suits images that already have their own white border.

Does the image quality change inside the PDF?

No, not for ordinary JPG files. A JPG that is already upright is embedded unchanged, because the PDF format can store JPEG data directly, so there is no generation loss and the PDF is about the same size as the images combined. PNG graphics stay lossless, WebP is converted to JPG or PNG depending on transparency, and HEIC photos are decoded locally.

One case triggers a single re-encode at 92 percent quality: a photo whose EXIF orientation flag says it must be rotated. During that re-encode, an image larger than about 16 megapixels is also scaled down to that size to stay within browser canvas limits. The difference is not visible at normal zoom levels.

How does it work without uploading anything?

The browser reads each file, checks its real format from the first bytes rather than trusting the extension, and applies the camera's EXIF orientation. The PDF is then assembled in a background Web Worker so the page stays responsive. Thumbnails are drawn from the same local data, and closing the tab discards everything.

The output is a standard PDF as described by the PDF specification, with one image per page and no added metadata about the device. Because no server is involved, there is no queue, no daily limit and no watermark, and the speed depends only on the device.

How do you get clean scans from phone photos?

Shoot from directly above in even light, crop to the paper edges, and print-size the pages. Phone snaps of paper look far more professional with a little care before and after conversion, and the text becomes searchable once OCR has been run on the finished PDF:

• Shoot in daylight from directly above to avoid shadows and keystone distortion.
• Crop each photo to the page edges in your gallery app before adding it.
• Choose A4 with a small margin for a print-ready result.
• Run OCR PDF on the result to make the text searchable and copyable.
• Add a signature afterwards with Sign PDF if the form needs one.