Image to PDF Converter: Free Online

To convert images to PDF, drop any mix of PNG and JPG files into the box above. There's no need to sort them by format first: the tool reads each file's actual content, not its file extension, to tell a PNG from a JPG, then handles each one the way it's supposed to be handled. Every file shows up as a thumbnail, in the exact order it'll become a page. Drag a thumbnail to move it, or use the arrow buttons if a drag isn't convenient.

Order and page size are two separate settings, and it helps to know how each one actually works. Order follows whatever sequence the thumbnails are in the moment you click Build PDF, nothing gets re-sorted afterward. Size comes from the page size option: Fit to image (the default) gives every page its own source image's exact pixel dimensions, so a document combining a tall phone photo with a wide screenshot ends up with pages of two different shapes, one per image. That's intentional, not a glitch. A4 and Letter instead force every page to one standard size, scaling each image down to fit inside it (never up, and never stretched out of its own proportions) and centering it, with an optional margin adding white space around the edges.

Neither format gets decoded and re-encoded along the way. A PNG's own bytes go straight into its page exactly as they were; a JPG's bytes go in the same way, at whatever compression the photo already had. That's also why a batch of five or six images builds in about a second: there's no image processing step, just reading files and assembling a document around them, in a background worker so the tab stays responsive the whole time.

Say you're preparing a quick product handoff: two PNG graphics and one JPG material photo, already in the order you want to share them. The three files total 5.2 MB.

Drop all three into the box above in any order, the tool doesn't care which format lands first. Drag them into the sequence the handoff should read in, select "Fit to image," and click "Build PDF." In a couple of seconds you'll have one three-page PDF. Because neither format gets re-encoded, the finished file stays close to its 5.2 MB source total; 5.9 MB is normal once the PDF container overhead is added.

Want every page the same size instead, say for printing? Switch to A4 or Letter before you build, and each image, regardless of its original format, gets centered and scaled down to fit without distortion.

PDF is a document container, not an image format itself, which is exactly why it can hold a mix of PNG and JPG pages without any conflict. This tool detects each file's actual format from its bytes (not just its file extension) and embeds it accordingly: PNG bytes go in losslessly, JPG bytes go in at their original compression, with no re-encoding step for either one.

If your files happen to all be one format, the dedicated PNG to PDF or JPG to PDF converters do the exact same thing; this page exists for the more common real-world case where they're not. Going the other direction, turning PDF pages back into images, always outputs a single consistent format (PNG or JPG, your choice) rather than trying to guess back what each page originally was.