When you'd want to convert JPG to PDF
The most frequent use case is combining scanned pages. If you've photographed or scanned a multi-page document page by page, converting all the images into a single PDF makes it a proper document again — one file, in order, easy to share.
For photographers and designers, combining multiple images into a PDF is a clean way to share a portfolio or proof without sending a folder of files.
Some organizations and government systems only accept documents in PDF format. If you have a JPG of a signed form or an ID document, converting it to PDF lets you submit it through those systems.
How to use the JPG to PDF tool
Open the JPG to PDF tool on Irreva. Upload your JPG files — you can add multiple images at once. The tool displays thumbnails so you can verify you've got the right files and see the order they'll appear in the PDF.
Drag the thumbnails to reorder the pages if needed. Choose the paper size (A4, Letter, or fit to image) and orientation. Click Convert and your PDF downloads immediately.
The conversion runs entirely in your browser using pdf-lib. Your images are not uploaded to any server.
Getting the page layout right
The 'fit to image' option creates PDF pages exactly the size of each input image, which is the best choice if your images are different sizes or if you want pixel-perfect reproduction.
A4 or Letter sizing places each image on a standard paper-sized page. Images are scaled to fit within the page margins. This is better if the PDF will be printed.
If your photos are in portrait orientation but the PDF pages are coming out landscape (or vice versa), check the orientation setting. The tool should auto-detect orientation per page, but you can override it.
Image quality in the output PDF
The JPG images are embedded in the PDF at their original resolution. There is no re-compression step that would reduce quality. A 5MB JPG will produce roughly a 5MB page in the PDF (the PDF container adds minimal overhead).
If the resulting PDF is very large and you need to reduce it for email, run it through the Compress PDF tool after conversion. You can dial in a smaller file size at the cost of some image quality.
For cleaner results with scanned documents, ensure good lighting and high contrast when photographing or scanning. Dark or blurry source images can't be improved by the conversion process.