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PNG to PDF: Merge Multiple Images Into One File

Combine many PNG images into one multi-page PDF in your browser. Drag to reorder pages, keep pixels sharp, nothing uploaded. No account, no watermark.

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How It Works

Stop emailing a folder of loose screenshots. Drop your PNGs here and each one becomes a page in a single PDF, in whatever order you arrange the queue. Drag a page up or down before you export and the output matches that sequence exactly. This is the tool for bundling bug-report captures, exported design comps, scanned receipts, or chart images into one document people can open, scroll, and print as a unit. Each PNG is decoded and placed onto its own page using pdf-lib. There is no JPEG step anywhere in the pipeline, so the image data going into the PDF is lossless: text in a screenshot stays crisp, flat color stays flat, and you get none of the blocky artifacts a JPEG-based "image to PDF" would introduce. Every page is sized to the source image's exact pixel dimensions, so a 1920x1080 capture produces a 1920x1080 page instead of being letterboxed onto a fixed A4 or Letter sheet. The one thing to plan for is transparency. PNG has an alpha channel; a PDF page does not. Any see-through region in your PNG ends up showing the PDF page background rather than staying transparent, so a logo with a knocked-out background will sit on whatever color the page renders as. If the background matters, flatten the PNG onto your chosen color in an image editor before adding it here. It all runs in the browser tab. Files are read from disk locally, the PDF is assembled in memory, and nothing is sent to a server or saved anywhere. Reload the page and the queue is gone.

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Convert toPDF

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Key Features

  • No file uploads required - works offline
  • 100% privacy focused - client-side processing
  • Browser powered - no software installation
  • Fast processing - WebAssembly technology
  • Free forever - no premium accounts

Supported File Formats

.png

Output Format: PDF

Technical Specifications

input Format PNG (Portable Network Graphics), one file or many
output Format PDF (Portable Document Format), one image per page
compression Type Lossless image embedding via pdf-lib (no JPEG re-encoding at any step)
quality Retention Pixel-faithful to the source; no lossy compression is applied to the image data
color Space Support sRGB; the alpha channel is dropped onto the opaque PDF page background
max Resolution Limited only by your device's memory
processing Time Instant, runs in your browser

Key Benefits

  • Merge many PNGs into a single multi-page PDF in one click
  • Drag pages up or down so the PDF follows the exact order you set
  • Lossless embedding keeps screenshots and line art pixel-sharp, no JPEG artifacts
  • Pages match each image's native pixel size, so nothing is scaled or cropped
  • Runs entirely in the browser, with no uploads and no copies left on a server
  • No account, no watermark, no per-file cap

Common Use Cases

  • Bundling a sequence of screenshots into one document for a bug report or how-to walkthrough
  • Turning exported UI mockups and design comps into a single review PDF for sign-off
  • Combining scanned receipts or paperwork saved as PNG into one file for expense or tax records
  • Packaging chart and dashboard exports into a report attachment
  • Making a printable handout from whiteboard or slide captures
  • Archiving a set of images as one durable, universally readable file

Pro Tips

  • Drag the queue into reading order before exporting, since the PDF follows the queue top to bottom
  • If your PNGs have transparency, flatten them onto a solid background first so pages look intentional
  • Resize PNGs to matching pixel dimensions beforehand if you want every page the same size
  • Keep very large, high-resolution PNGs in smaller batches to stay within browser memory
  • Expect the PDF to be larger than the combined PNGs, since lossless image data favors quality over size

Frequently Asked Questions

Add all your PNGs to the queue, drag them into the order you want, then click create. Each image becomes one page, top of the queue first, and you download a single PDF. There is no separate merge step; the order you set in the queue is the order in the file.
No. The image data is embedded losslessly with pdf-lib and never passes through JPEG compression, so pixels in the PDF match the source PNGs. Text and line art stay sharp. The trade-off is file size: the PDF can be larger than the original PNGs because lossless image data inside a PDF is not always as compact as PNG's own compression.
They are not preserved. A PDF page is opaque, so any transparent pixels show the page background instead of staying see-through. If you need a specific look, flatten the PNG onto a solid background color (white, brand color, whatever you want) in an editor before converting.
The image size. Each page is built to match its source PNG's pixel dimensions, so a 1024x768 image makes a 1024x768 page with no scaling, cropping, or white margins. This keeps full resolution but means page sizes vary if your images do. Resize the PNGs to matching dimensions first if you want a uniform document.
No. Everything happens in your browser with local JavaScript. The PNGs are read from your disk, the PDF is built in memory, and nothing is transmitted or stored anywhere. This holds whether you convert one image or a hundred, which makes it safe for receipts, IDs, or internal screenshots.
There is no fixed limit. The real ceiling is your device's memory, since every image is decoded in the browser before the PDF is assembled. Dozens of normal screenshots are no problem on a typical laptop; a long run of very large, high-resolution images is what will eventually strain memory, so split those into smaller batches.
Yes. Each item in the queue has up and down controls, so you can rearrange or remove images before exporting. The page order in the PDF always follows the final queue order, so set the sequence first, then create the file.
A PDF is one file that opens the same on any phone, laptop, or printer without a viewer that supports your image format, and it prints predictably one page at a time. It is the cleaner way to hand off a set of screenshots, scans, or design exports for review, archiving, or as a single email attachment.