# How to convert JPG to PDF on any device Source: https://mergevanta.com/guides/convert-jpg-to-pdf Published: 2026-10-21 Updated: 2026-10-21 Author: Mergevanta > Convert JPG photos to PDF for free on a phone or computer: turn one image or many into a single PDF, pick a page size and keep full image quality. ## Quick answer: How do I convert JPG images to PDF? Open Mergevanta's JPG to PDF tool, add one photo or a whole batch, drag them into order, pick a page size and press Merge. Every image becomes a page of one PDF, and the JPEG data is embedded without re-compression, so quality doesn't drop. It's free, with no watermark or sign-up. ## How to convert JPG to PDF, step by step 1. Open [Mergevanta's JPG to PDF tool](https://mergevanta.com/jpg-to-pdf) in your browser, on a phone or a computer. 2. Add your JPG files: drag in a folder of photos on a computer, or pick them from your gallery or Files on a phone. 3. Drag the thumbnails into the order the pages should appear. 4. Choose a page size and margin, and turn on page numbers if you want them. 5. Press Merge and download one PDF with every image on its own page. ## Which page size should you choose? | Page size | Best for | | --- | --- | | A4 | Printing, and documents for most of the world | | A4 landscape | Wide photos, slides and screenshots | | Letter | Printing in the US and Canada | | Fit to image | Reading on screen: each page takes the size of its photo | Portrait and landscape photos can sit in the same PDF. The glossary explains [A4](https://mergevanta.com/pdf-glossary#a4) and [US Letter](https://mergevanta.com/pdf-glossary#us-letter) if you're not sure which your printer uses. ## Will converting JPG to PDF reduce quality? Not with Mergevanta. Many converters decode each photo and compress it again, which adds a second round of [lossy compression](https://mergevanta.com/pdf-glossary#lossy-compression) and blurs fine detail. Mergevanta copies the JPEG data into the PDF unchanged, so the PDF is exactly as sharp as the photos you added. The flip side is file size: a PDF made from ten 4 MB photos will be roughly 40 MB. If you need a smaller file to email, resize the photos first and then convert them. ## Converting JPG to PDF on iPhone, Android, Windows and Mac - iPhone and iPad: open the tool in Safari, tap the drop zone and choose Photo Library or Browse. The PDF saves to Files › Downloads. - Android: open the tool in Chrome, tap the drop zone and pick photos from your gallery or Files. The PDF lands in your Downloads folder. - Windows and Mac: drag photos straight from File Explorer or Finder onto the drop zone. - Scanning paper pages with your phone camera? [How to combine scanned pages or photos into one PDF](https://mergevanta.com/guides/combine-scanned-documents) has tips for clean, readable scans. ## Mixing JPG with PNG and other images You don't need to convert everything to JPG first. PNG, WebP, GIF and BMP images can go into the same PDF alongside your JPGs. For screenshots and graphics, [PNG to PDF](https://mergevanta.com/png-to-pdf) keeps sharp edges lossless, and [JPG vs PNG](https://mergevanta.com/compare/jpg-vs-png) explains which format suits which image. Already have some pages as a PDF? Convert the photos first, then combine everything with [Merge PDF](https://mergevanta.com/merge-pdf). ## In short - Mergevanta's JPG to PDF tool turns one or many photos into a single PDF, one image per page, for free. - JPEG data is embedded as it is, so the PDF is as sharp as your photos. - Choose A4 or Letter for printing, or Fit to image so each page matches its photo. ## Frequently asked questions ### How do I combine multiple JPGs into one PDF? Add all the JPG files at once, arrange them and press Merge. Each image goes on its own page of a single PDF, so there are no separate files to join afterwards. ### Does the PDF keep my photo quality? Yes. JPEG data is embedded without re-compression, so the PDF looks exactly as sharp as the original photos. ### Can I convert JPG to PDF without an app? Yes. The [JPG to PDF](https://mergevanta.com/jpg-to-pdf) tool runs in Safari, Chrome and other mobile browsers, so you can pick photos from your gallery and download the PDF without installing anything. ### Can I add page numbers? Yes. Turn on page numbers before you press Merge and they're added to every page. ### Is the JPG to PDF converter free? Yes. It's free, with no sign-up, no watermark and no limit on the number of images. Try it: [JPG to PDF](https://mergevanta.com/jpg-to-pdf) — free, no watermark, no sign-up.