How to Convert JPG/PNG to PDF Without Losing Quality?

When you merge invoices, receipts, design drafts, or photos into a PDF, the worst outcome is a blurry result with huge white margins. Quality loss is usually not the image's fault — it's the conversion method compressing it. Here's why, and how to keep it high-resolution.

Why the output looks blurry

Two common reasons: some online tools upload images to a server and re-compress them to save bandwidth; and when you insert images into Word and export to PDF, Word auto-scales the images and adds page margins, creating both white space and possible quality loss.

How to keep it high-resolution

The key is "local, no re-encoding." UniPagePDF lays out images into a PDF locally in your browser at original resolution, with no server compression, keeping them high-quality and lossless; it also supports a specified paper frame like A4, or keeping the original image size. See the step-by-step: How to merge and convert multiple images into one PDF.

A quick format tip

Use JPG for photos and gradients (smaller size); use PNG for screenshots with text, lines, or UI (sharper). UniPagePDF supports both — drop in many at once, reorder freely, and rotate with one click.