When a picture needs to be a PDF
Plenty of systems accept documents only as PDF: job and school applications, landlord and bank requests, expense tools, government forms. Meanwhile, what you have is often an image, such as a screenshot of a confirmation, a downloaded certificate, a photo of a form or a graphic someone sent you. Converting the image to PDF is the quickest way to make it acceptable.
A PDF also looks the same everywhere. It opens on any device with the same page size, prints predictably, and doesn't get recompressed by messaging apps the way photos often do.
Which image formats work
JPG, PNG and WEBP are accepted, and you can mix them in one PDF. JPG photos that don't need rotating are embedded exactly as they are, with no recompression, so they keep their original quality. Other images are converted without changing their dimensions.
iPhone photos in HEIC format work only if your browser can open them, which Safari usually does. In browsers that can't, you'll see a clear message rather than a broken file. GIF and other formats should be converted first with “Convert image”.
Choosing the page layout
Letter is the usual paper size in the US and Canada, while A4 is standard in the UK, India and most other countries. Pick the one used by whoever will print or file the document. “Same as image” makes each page exactly the size of its picture, with no white border, which is ideal for documents read only on screen.
Orientation can be automatic, portrait or landscape; automatic picks the best fit for each image, so a wide screenshot gets a landscape page. Margins can be none, small or large. A small margin looks tidy when printed.
Too heavy? Compress the result
Images from phones and design tools can be large, and the PDF inherits their weight. If the finished file is over a portal's limit, send it straight to “Compress PDF”, without selecting it again, and set a target size. Alternatively, reduce the images first with “Compress image”, then convert them.
Private and free
The conversion happens in your browser. Your images aren't uploaded and nothing is stored, which matters when they show IDs, payslips or medical documents. There's no account, no daily limit, and ConvertirDocs adds no watermark to your PDF.