PNG to PDFConvert PNG Screenshots and Images to PDF

PNG is the format of screenshots, diagrams, logos and exported charts. It keeps text edges sharp and can hold transparent areas. When you need to send those images as one document, a PDF is the usual answer. Kwebby's PNG to PDF tool converts one or many PNG files into a single PDF in your browser. You add the images, set the order, pick a page size and download. The PNG pixels go into the PDF without loss, and your files stay on your device. This guide explains how the conversion treats transparency, sharpness and file size, so the PDF looks the way the PNGs did. More converters are on the PDF tools hub.

Key Takeaways

• Kwebby's PNG to PDF tool turns one or many PNG images into one PDF, one image per page. JPG, WebP, GIF and BMP files also work.
• PNG pixels are stored without loss, so screenshot text and thin lines stay as sharp as in the original file.
• Transparent areas stay transparent inside the PDF. A PDF viewer shows the white page through them, and a printer prints them as blank paper.
• Page size is A4, Letter or Fit to Image. Images are centred and scaled to fit, never cropped.
• Fit to Image makes each page as many points wide as the image is pixels wide, so large screenshots become large pages.
• The PDF builds in your browser with pdf-lib and downloads as images.pdf. Nothing is uploaded.

What Is the Kwebby PNG to PDF Tool?

Kwebby's PNG to PDF tool is a free, browser-based converter that places PNG images into a PDF, one image per page. It runs on the same engine as the JPG to PDF tool, with the page set up for PNG files. You need no account and no software.

The tool reads each file in your browser. A real PNG file goes straight into the PDF with pdf-lib, an open-source JavaScript library. A JPG goes in as it is. WebP, GIF and BMP files are first drawn on a canvas and saved as PNG, then added the same way.

Key Features and How It Works

Lossless PNG Pages

PNG uses lossless compression. The tool keeps that promise: it stores the exact pixels of each PNG in the PDF and adds no JPG-style compression. Small UI text in a screenshot, code in an editor window and one-pixel chart lines come out unchanged.

Transparency Kept in the PDF

A PNG can have an alpha channel, which marks some pixels as see-through. The tool stores that alpha channel with the image, so transparent areas stay transparent inside the PDF. The PDF page itself has no background colour. On screen, PDF viewers show a white page, so a logo with a transparent background appears on white. On paper, the transparent areas print as blank paper.

Many Images in a Set Order

Select several PNG files at once or drop them on the upload area. Each file shows as a thumbnail with its name and size. The ◀ and ▶ buttons move an image one place left or right, and × removes it. On a computer the buttons appear when you hover; on a phone they stay visible. The page order in the PDF matches the thumbnail order.

Three Page Sizes

A point is 1/72 of an inch. On A4 and Letter, the image keeps its full pixel data even when it is drawn smaller, so zooming into the PDF still shows detail.

Why Convert PNG to PDF?

PNG files are easy to make and hard to send in bulk. A PDF solves a few common problems:

• One attachment: ten screenshots of a bug or a process become one file with pages in order.
• Portals that ask for PDF: many upload forms accept PDF but not PNG.
• Fixed pages for printing: A4 or Letter pages print at a predictable size.
• Readable on any device: a PDF opens in browsers, phones and desktop readers without an image viewer.
• Sharp text kept: PNG to PDF keeps screenshot text crisp, where a JPG export would add compression artifacts.

How to Use the PNG to PDF Tool

1. Click the upload area or drag your PNG files onto it. You can select several at once.
2. Check the thumbnails. Use ◀ and ▶ to change the order, or × to remove an image.
3. Under Page Size, choose A4, Letter or Fit to Image.
4. Click the convert button. Its label shows the count, for example Convert 4 Images to PDF.
5. Open the downloaded images.pdf and check the page order.

Best Practices for PNG to PDF Conversion

Pick Fit to Image for Screenshots You Read on Screen

A full-width desktop screenshot is wide and short. On an A4 portrait page it shrinks to the page width and leaves large blank bands. Fit to Image gives each screenshot a page of its own shape. Keep in mind that Fit to Image uses one point per pixel: a 1920 by 1080 screenshot becomes a page about 26.7 by 15 inches. That size is fine for reading on screen, and printers scale it down to fit the paper.

Pick A4 or Letter for Documents You Print or Upload

Forms and printers expect a standard page. A4 and Letter keep every page the same size, which matters when a portal checks page dimensions or when you print a stack.

Watch the File Size

Lossless storage has a cost. A PNG screenshot is often larger than a JPG of the same picture, and photos saved as PNG are much larger still. The tool re-compresses PNG pixels without loss, so the PDF ends up roughly the size of your PNG files, sometimes a little larger or smaller. If an upload form has a size cap, shrink the images first with Image Optimizer, which can save PNG, JPEG or WebP at a chosen quality. JPEG output suits photos. PNG output suits screenshots with text.

Flatten Transparency When the Background Matters

Transparent areas show whatever sits behind the page, which is white in nearly every viewer. If you want a coloured background behind a transparent logo, add that background in an image editor before you convert. The tool does not fill transparency for you.

Remember That Text in a PNG Is Not Selectable

A screenshot of text is a picture. The PDF will not let you search or copy those words. If you need the text, read it with PNG to Text, which uses OCR on Kwebby's server, then paste it where you need it.

Rename the Download

Every PDF downloads as images.pdf. Rename the file before you send it, so a folder of exports stays clear.

Common Use Cases

• Bug reports: combine a sequence of screenshots into one file for a ticket.
• Software guides: turn step-by-step screen captures into a short PDF manual.
• Design reviews: send logo, icon and mockup PNGs as one document.
• Charts and dashboards: share exported PNG charts as a report.
• Scanned pages saved as PNG: join them into one multi-page PDF.
• Certificates and receipts saved from a browser: upload them where a PDF is required.

Related Kwebby Tools

• JPG to PDF converts photos and other images to PDF with the same controls.
• PDF to PNG goes the other way and saves each PDF page as a PNG image.
• Merge PDF joins your new PDF with other documents.
• Compress PDF rewrites the PDF structure, though it does not resample images.
• Image Optimizer shrinks PNG files before you convert them.
• Rotate PDF turns sideways pages upright.
• PNG to Text reads the text inside a screenshot with OCR.

Final Thoughts

PNG to PDF is the right route for screenshots, diagrams and graphics, because the pixels stay exact and transparency survives. Pick Fit to Image for screen reading and A4 or Letter for forms and printing, keep an eye on file size, and rename the download. When you need the reverse, PDF to PNG saves PDF pages as PNG images.