JPG to PDF Online

Converting images to PDF wraps one or more images in a document container. It is the standard workflow for turning phone photos of a paper form into a submittable file, packaging a set of scanned receipts, or bundling illustrations into a portfolio. The tool accepts JPEG, PNG, and WebP inputs and produces a single PDF with one image per page. Page dimensions match the image dimensions, so nothing is cropped or stretched. Order in the file list becomes page order in the output. Everything happens in your browser using pdf-lib. Images are read as bytes, embedded directly into the PDF using their native format (JPEG stays JPEG, PNG stays PNG lossless), and a new page is added around each. No re-encoding, no server upload, no quality loss for JPEG sources.

Last reviewed: July 2026

What is this?

PDF measures everything in points where one point equals 1/72 of an inch. When you convert a 1920×1080 pixel image, the tool creates a page sized 1920×1080 points, so the image displays at native resolution. Two embedding formats are used behind the scenes: JPEG images are stored using DCT encoding (a direct copy of the JPEG bytes, so no quality loss), while PNG images are stored using Flate encoding for lossless preservation. WebP is decoded first and then embedded as PNG. This is why the output file size closely matches the sum of input image sizes — the tool is packaging, not re-compressing.

How to use this tool

1. 1Choose one or more image files. Drag them in or select them individually. The order shown in the file list becomes page order in the PDF, so reorder before processing if you want a specific sequence.
2. 2Review the image list. Remove any file added by mistake. Very large images (say 8000×6000 pixels) produce large PDF pages — consider resizing them beforehand if the target is email attachment.
3. 3Click Process. The tool reads each image, embeds it into a new PDF page sized to match, and saves the combined document. This runs locally in your browser.
4. 4Download the PDF. Open it to verify page order before sending. Most viewers show one image per page at native resolution — if the PDF looks bigger than expected, that is because pages match image size directly.

Tips & best practices

• Order matters: images convert in the order shown in the file list, becoming pages 1, 2, 3, and so on. Rearrange before processing.
• JPEG embedding is lossless — the JPEG bytes go into the PDF as-is. So a 5MB JPEG becomes a roughly 5MB PDF page, not a re-compressed version.
• Very tall or wide images (say a scanned receipt at 3000×10000 pixels) produce non-standard PDF pages. Some viewers may zoom oddly — consider splitting the image first.
• For scanned documents, JPEG at 300 DPI is a good balance. PNG works for text-heavy scans but produces files 2-4x larger than the equivalent JPEG.
• If you have transparency (PNG with alpha), the transparent regions render white in the PDF because PDF pages have no transparency at page level. Add a background color to the image first if that matters.