How a JPEG Becomes a One-Page PDF
A PDF can hold JPEG bytes almost as they are, using a DCTDecode stream. This guide explains that direct wrapping and why it only suits JPEG input.
What is the JPG to PDF Converter?
A photo often needs to travel as a document, and a one-image PDF is the simplest way to do it. In a browser you choose a JPEG file and this tool wraps its bytes directly into a PDF page, without recompressing them. Each page holds one image, and other image formats are not accepted by this plain builder.
How to use it
- Choose a JPEG image file in a browser.
- Click Convert JPG to PDF.
- Confirm the verification lines show an image object.
- Use the download link to save the one-image PDF.
Worked example
For a synthetic JPEG marker sequence from FFD8 to FFD9, the tool builds a PDF with a DCTDecode image object, a %PDF header, and a %%EOF trailer.
Why does a JPG to PDF tool only accept JPEG?
JPEG data can be embedded with the DCTDecode filter, so the builder does not need to decode and re-encode pixels. Other formats would need a full image decoder first.
Frequently asked questions
Can I use a PNG here?
No. This builder is JPEG only, because it embeds JPEG bytes directly.
Does it resize the photo?
It places one image per page at a fixed page size; it does not edit or crop the photo.