You can combine any number of PNG images into a single multi-page PDF in your browser, with each PNG landing on its own page in the exact order you selected them, and the entire batch — whether it is two screenshots or fifty product mockups — is processed locally so nothing is uploaded to a server. The result is a PDF that embeds each PNG losslessly, which means the sharp 1-pixel borders, thin lines, and small text that PNG was designed to preserve stay pixel-perfect when the file is opened, zoomed, or printed. Because every image is placed on the page at 72 DPI (72 points equal one inch), a 1200-pixel-wide screenshot is scaled down to fit inside a US Letter page, and a square diagram can sit on a clean white background at its natural size without being stretched. Layout choices — A4, US Letter, or Fit to image for the page, Auto/Portrait/Landscape for orientation, and None/Small/Normal for margins — apply to the whole batch and can be changed at any moment before you download. The file you save contains one image per page in selection order, ready to share, attach to an email, or hand off for review through the PNG To PDF tool.
What "multiple files at once" really means
When you batch PNGs into one PDF, every selected image becomes one page of the same document, so the output is a single file you can email, archive, or upload instead of a folder full of loose screenshots. The tool accepts a single PNG or dozens in one pass and rebuilds the PDF automatically whenever you change the page size, orientation, margin, or the order of your files. Because everything runs in JavaScript using the pdf-lib library, you can drop a folder of UI captures, a stack of receipts photographed as PNG, a set of logo variations, or a series of chart exports into the browser and walk away with one tidy PDF instead of trying to attach them one at a time.
The privacy model is the same whether you convert one image or a hundred: nothing is sent over the network, there is no account to sign in to, and no queue sits between you and your download. Once the page is loaded in your browser, the tool keeps working even if your internet connection drops, because all the conversion work happens on your own machine. That makes it appropriate for batches you would not normally want to hand to a third-party service, such as internal dashboards, unreleased product mockups, personal scans, or anything covered by an NDA.
Combine multiple PNGs into one PDF
- Open the PNG To PDF page and click Browse PNG images to pick one or many PNG files, or drag them straight onto the page. They stay on your device and are never uploaded to a server.
- Choose your Page size (A4, US Letter, or Fit to image), Orientation (Auto, Portrait, or Landscape), and Margin (None, Small, or Normal). You can also add more images or clear the batch at any point before downloading.
- Wait a moment for the PDF to build — the tool embeds each PNG losslessly using pdf-lib, with one image per page in the exact order you chose.
- Click the download link to save your multi-page PDF. The finished file is offered as a lossless multi-page PDF.
Layout controls for the whole batch
Three options shape the page your images land on, and each one is applied to every image in the batch. The PDF never blows an image up beyond its natural pixel size, so a small logo stays sharp instead of pixelating to fill a wider page; the image is always scaled to fit inside the chosen margins while preserving its aspect ratio and is centered on the page.
Page size sets the canvas the image is placed on. Fit to image makes that canvas exactly the size of the image itself with no surrounding whitespace, which is ideal for edge-to-edge screenshots or print-ready artwork where every pixel should be visible. A4 and US Letter add the standard printable border around the image, which most people expect for a "sharable" PDF.
Orientation can be left on Auto, which selects portrait or landscape per image based on whether it is taller or wider than it is tall. This is the right default for a mixed batch of vertical phone screenshots and horizontal desktop captures, because each image gets the orientation that fits it best. If your batch is a uniform set, such as ten landscape dashboard captures, forcing Portrait or Landscape keeps the document visually consistent.
Margin controls the white border around the image inside the page. None removes it, which suits Fit to image perfectly and also looks clean for diagrams. Small adds 18 points of padding and Normal adds 36 points — both are useful when the PDF will be printed or hole-punched, because the image will not sit right against the edge of the paper.
Page sizes at a glance
The two fixed page sizes are defined by international and North American printing standards, and the tool embeds the exact point dimensions below into each one.
| Page size | Width × Height | Best for |
|---|---|---|
| A4 | 595 × 842 pt (210 × 297 mm) | International standard; right pick for most countries outside North America. |
| US Letter | 612 × 792 pt (8.5 × 11 in) | North American standard; right pick for U.S. and Canadian print and form submissions. |
| Fit to image | Exactly the image's pixel size at 72 DPI | Edge-to-edge screenshots, diagrams, or artwork where surrounding whitespace should not appear. |
Why PNG stays sharp where JPG blurs
PNG is a lossless format: it stores every pixel exactly as it was drawn, with no compression artifacts, no color bleeding, and no blurry halos around text and edges. When a screenshot, an app UI capture, a logo, a chart, a diagram, or a piece of line art is first saved as JPG and then dropped into a PDF, the lossy JPEG step smears thin lines and softens sharp boundaries. Embedding the original PNG losslessly keeps a 1-pixel border as a 1-pixel border and keeps small text legible at full zoom. PNG also supports transparency; here, any transparent area is composited onto a clean white background so it prints and reads correctly on the page instead of turning black.
| Content type | Best format to embed | Why |
|---|---|---|
| Screenshots, UI captures, app states | PNG | Text and 1-pixel borders stay crisp; transparency composites onto white cleanly. |
| Logos, icons, line art, diagrams | PNG | Lossless embedding avoids the halos and color fringing that JPG introduces around thin shapes. |
| Scanned documents, forms, receipts | PNG | Fine print and small type remain readable at full zoom. |
| Photographs where every kilobyte counts | JPG | Photographs tolerate lossy compression better than graphics, and a JPG to PDF pass produces a noticeably smaller file. |
Practical uses for a batch PNG to PDF
Stitching screenshots into a single PDF is the most common reason people search for this workflow. A support reply can attach five screen captures as one file. A bug report can show before/after/after in one document. A UX review can carry the full click-through of a flow on consecutive pages, in the exact order the user saw them.
Product and design teams lean on batch PNG to PDF to deliver review-ready decks of UI states, light/dark themes, locale variants, or device breakpoints, all with pixel-accurate edges that hold up under stakeholder scrutiny. Because the PDF embeds each PNG losslessly, the team can zoom into a 12-pixel-tall icon in the review and still see the grid lines clearly.
Scanned line drawings — receipts photographed in good light, signed forms captured as PNG to preserve the ink, technical drawings exported from CAD — also benefit from a lossless batch. Each scan becomes one page, the document is portable, and the text and lines stay sharp when printed or faxed on.
Limits and things to know before you start
Everything is processed in your browser, which has a practical ceiling. A very large batch of high-resolution PNGs can take a moment to encode and embed, and your machine needs enough free memory to hold all of the decoded image data at once. If your batch contains only a handful of images, this is invisible; if it contains hundreds of very large files, you may want to split the batch into smaller groups before converting.
Transparent areas in any PNG are placed on a clean white background before being drawn into the page, so transparency reads as white on the page instead of turning black, and prints correctly. If you need a different background color, lay the PNGs over that color before adding them to the batch.
Images are never blown up beyond their natural size. A small logo dropped into a US Letter page will sit at its original pixel size in the center of the page rather than stretching to fill the printable area. To get a larger image in the PDF, prepare a larger PNG before converting — the tool does not invent pixels that were not in the original file.
Order is selection order. The first file you pick is page 1, the second is page 2, and so on. If the order in the resulting PDF does not match the order you wanted, simply re-pick the files in the right order, and the PDF rebuilds automatically with the new sequence.
Because the entire batch is converted locally, you can repeat the workflow as often as you like, change page size or orientation between runs, and try a Fit to image version alongside a US Letter version without sending anything off your device. The only thing the tool asks of the user is to pick the files and decide on a layout; the rest is handled on the same machine.