PNG to PDF Converter

Why convert PNG to PDF?

A lossless raster format built for screenshots, logos and any artwork with hard edges or transparency. None of that helps when a portal asks for one document. Binding PNG files into a PDF gives you ordered pages, one file to upload, and a format nothing refuses.

The practical trigger is almost always someone else's requirement: an upload box that accepts PDF only, a form that wants supporting documents as a single file, a printer that will not take a folder, or a reader who should not have to click through screenshots captured over a session, design exports from one project, or a set of pages scanned to PNG by an office multifunction printer one image at a time.

PNG's transparency cannot survive the trip. A PDF page has a background, so anything transparent is composited onto white before it is written — which is what you want for a scan or a screenshot, and worth knowing about for a logo that was designed to sit on a coloured background.

Where PNG files come from

The PNG files people bind into PDFs are usually screenshots captured over a session, design exports from one project, or a set of pages scanned to PNG by an office multifunction printer. Two familiar cases: a screenshot exported from a design tool that has quietly grown to several megabytes, and a logo or icon supplied by a designer with a transparent background.

Screenshots are the reason this page exists. A folder of PNG screenshots is the modern equivalent of a pile of paper — evidence for a support ticket, a bug report, a claim, a set of steps for someone who needs them in order — and email and portals want one file rather than fourteen. Binding them into a PDF also fixes the ordering problem that attachments have: pages are read in the sequence you arranged them, not in whatever order the mail client felt like listing the files.

How the conversion works here

Drop your PNG files onto the box above — all of them at once — and drag the thumbnails into the order you want the pages to appear. Each image is decoded by your browser, drawn onto a page of the size you pick, and written into a PDF that downloads straight to your device. Nothing is uploaded at any stage, which for scanned documents and identity paperwork is the whole point.

Each image becomes one page, sized to fit the page box with its aspect ratio preserved, so nothing is stretched. Portrait images sit on portrait pages and landscape ones on landscape pages unless you fix the orientation, and the quality control governs how hard the images are re-encoded on the way in — leave it high for text and documents, lower it only when the file has to meet a size cap.

If the finished PDF is larger than the portal accepts, do not fight it here: run the result through the PDF compressor, which searches for the quality that fits your target and reports the size it reached. Compressing once at the end beats guessing at the quality slider before you know how big the document will be.

Getting a document rather than a slideshow

Order first, then convert. Rearranging thumbnails before you press the button takes seconds; fixing the page order afterwards means opening the PDF in an organiser and moving pages around. If your PNG files are named with numbers, sort the folder before you drag them in and the order usually comes out right on its own.

Straighten and crop the images before binding them. A photographed document that sits at an angle inside a white page looks like a photograph of paper, not a document, and the tilt survives into every copy anyone makes of that PDF afterwards. Cropping to the paper's edge also removes the desk, the shadow and the byte cost of both.

Keep the PNG originals until the document has been accepted. A PDF is a delivery format: if the receiver asks for a clearer copy of page three, you want the original image rather than a page extracted back out of a compressed document.