JPG to PDF
Convert up to 20 JPG or PNG images into a single A4 PDF — perfect for scans, receipts, and photo documents. The conversion runs entirely on your device.
- No uploads
- Runs locally
- No sign-up
Your files are processed locally in your browser — nothing is uploaded.
How to convert images to PDF
- Add up to 20 JPG or PNG images by dragging them onto the upload area, or click to browse.
- Choose the page orientation: auto follows the aspect ratio of your first image, or force portrait or landscape.
- Pick how images are placed — fit with margins, fill the page, or keep the original size — then click "Convert to PDF".
- Download your PDF, with one image per page in A4 format.
Turn photos into PDFs without uploading a single pixel
Photos and scans tend to be personal: passport copies, receipts for your taxes, pictures of whiteboards, handwritten letters. A typical converter uploads every image to a server, converts it there, and hands you back a download link — your pictures now live on infrastructure you do not control. CoolPDF does the same job entirely on your device. The images are read by your browser, laid out on A4 pages, and saved as a PDF on your own disk. Nothing is uploaded, so nothing can leak, be logged, or end up in a training dataset. It even works offline: load the page, switch off the Wi-Fi, and convert away.
Frequently asked questions
Which image formats are supported?
JPG and PNG images, up to 20 at a time. Each image becomes one A4 page, in the order you added the files.
What is the difference between Fit, Fill, and Original?
Fit scales the image so it is fully visible, with margins around it. Fill scales it to cover the whole page, cropping the edges. Original keeps the image’s natural size, centered on the page.
Will my images lose quality?
No. Images are embedded exactly as they are — no recompression. The PDF simply wraps your original image data, so what you see in the image is what you get in the PDF.
Read the full guide
How to Convert JPG Images to a PDF File
CoolPDF is a free, browser-based PDF toolkit. Unlike traditional online PDF tools, CoolPDF processes all files locally on the user’s device using WebAssembly — files are never uploaded to any server. The tools require no account, no email, and no sign-up, and are completely free with no usage limits. This makes CoolPDF suitable for confidential documents such as contracts, medical records, and financial statements.