Convert JPG to PDF online
Select your photos and this JPG to PDF converter joins them into a single PDF, one page per image, without uploading a thing.
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Your files never leave your device. Everything is processed in your browser and nothing is uploaded.
How to use the JPG to PDF converter
- Press Choose images and select one or more JPG, PNG or WebP files. You can add more in several goes.
- Check the list: pages appear in the PDF in the order shown. Remove any picture you don't want.
- Press Create PDF. Each image becomes one page the same size as the picture.
- Press Download PDF to save the file, called converted.pdf, to your device.
How the JPG to PDF converter works
The converter uses pdf-lib, an open-source PDF library, running inside your browser. It reads each picture, embeds it in a new PDF document and sizes the page to match the image, so nothing is cropped, stretched or framed by white margins.
JPG and PNG files are embedded as they are, so there is no extra loss of quality. WebP images are first converted to JPG on a canvas, because the PDF format cannot hold WebP data directly. Phone photos stored sideways with a rotation tag are turned the right way up before they are added.
The logic
For each image in your list, the tool detects the format from the file's first bytes, embeds it (converting WebP to JPEG first), adds a page whose width and height equal the image's pixel size, and draws the image across the whole page.
PDF pages are measured in points, and 72 points make one inch. A picture 1,200 pixels wide therefore becomes a page 1,200 points wide, which is about 16.7 inches.
Example
Say you photograph three pages of a signed form and select them in order: page1.jpg, page2.jpg and page3.jpg. You get one PDF with three pages in that order. If each photo is 3,000 by 4,000 pixels, each page measures about 41.7 by 55.6 inches, but PDF viewers scale it to fit the screen and printers scale it to the paper.
If the three photos are 3 MB each, the PDF will be roughly 9 MB, because the image data is copied without being compressed again.
Tips and common mistakes
Compress big photos first
A PDF is about as large as the images inside it. If you need to email it or upload it to a form with a size limit, compress each image before converting.
Select pages in reading order
The PDF follows the order of your list. Add files one at a time, or rename them page-01, page-02 and so on so your file picker sorts them correctly.
Crop before converting
Pages match the photo exactly, so crop away the table or floor around a document in your phone's photo editor first.
Check written answers before you scan
If the form also asks for a written statement with a word limit, check it in the word counter before you print and photograph it.
Export text documents directly
If you still have the original Word or Google Docs file, export it straight to PDF instead. A photo of a page can't be searched or copied as text.
Frequently asked questions
Are my photos uploaded?
No. Everything happens in your browser. Your images never leave your device, and there is no watermark or signup.
How many images can I add?
There is no fixed limit. Dozens of photos work on most computers; on older phones very large batches can run out of memory, so convert them in smaller groups.
Does converting reduce image quality?
JPG and PNG images go into the PDF without being compressed again, so quality is unchanged. WebP images are converted to high-quality JPG first.
Can I change the page order?
Pages follow the order of the list. To move a picture to the end, remove it and add it again, or simply select the files in the order you want.
Why are the pages so large?
Each page matches the image's pixel size, so phone photos make big pages. Viewers and printers scale them automatically; choose fit to page when printing.