PNG to PDF
Convert PNG images to a PDF with transparency preserved. 100% in your browser — nothing uploaded.
Select PNG images
or drop up to 50 PNG files here
Your file is ready
Processed entirely in your browser — the file never left your device.
How to convert PNG to PDF
Add PNGs, arrange, set the page, download.
Select PNGs
Up to 50 PNG files. Transparency preserved.
Arrange
Drag to reorder, ✕ to remove.
Download
One PDF, one image per page.
What is "PNG to PDF"?
Converting PNG to PDF means wrapping one or more PNG image files into a single PDF document, one image per page. PNG is the format of choice for screenshots, diagrams, logos, UI mockups, and anything with sharp edges or transparency, because it stores every pixel losslessly. PDF, on the other hand, is the format every reader on every device opens cleanly — banks, schools, governments, recruiters, everywhere.
Most people reach for PNG-to-PDF when a service rejects PNG uploads, when bundling screenshots into a bug report or design handoff, or when a chain of tools downstream only understands PDFs. The output keeps the original pixels intact and lets you set the page size, orientation, and margin so the result prints cleanly.
How PNG to PDF works in your browser
When you drop PNG files on the page, your browser decodes each one locally using its built-in image decoder — the same code that renders any PNG on any web page. The dropzone runs entirely in JavaScript; no file is uploaded.
The PDF itself is built with
pdf-lib:
the page size you pick (A4, Letter, Legal, A3, or Auto-from-image)
is created, each PNG is embedded as a PDF object via
embedPng() with its alpha channel intact, then drawn
onto the page with the margin you set. Because pdf-lib does not
re-encode the PNG, every pixel of your source image lands in the
output exactly as it was — which is why this tool is better than
JPG-to-PDF for screenshots and diagrams. When you close the tab,
both the images and the PDF disappear from memory.
Common use cases
- Bundling screenshots into a bug report. Capture each step with the OS screenshot tool, drop them all here, get one PDF you can attach to a Jira/Linear/GitHub issue.
- Design handoff documents. Combine UI mockups exported from Figma/Sketch as PNG into a single deliverable PDF for stakeholders.
- Sharing diagrams. Architecture diagrams, ER diagrams, and flowcharts exported as PNG render sharper as PDF than as JPG.
- Logo and brand asset packages. Pack a brand's PNG variants (full color, monochrome, inverted) into one PDF brand sheet.
- Submitting transparent assets. When the recipient needs to see the transparency (or print on coloured paper), PNG-to-PDF preserves it where JPG-to-PDF cannot.
Privacy & security
Screenshots and diagrams are often sensitive — they capture unreleased product UI, internal architecture, customer data shown on screen. Most online PNG-to-PDF converters upload every image, build the PDF in the cloud, and ask you to trust their retention policy. imisspdf runs the whole conversion inside your browser with pdf-lib. Nothing is uploaded, no account is required. See our iLovePDF privacy review for what the standard upload model actually looks like.
Frequently asked questions
Yes. pdf-lib embeds PNG with its alpha channel intact, so transparent pixels in the source remain transparent in the PDF. The "page" around the image, however, is the PDF default page background — typically white. If you want the image to fill the page edge-to-edge, pick "Auto" page size (no margin), which makes the page exactly match the image dimensions.
Up to 50 images per PDF. The limit exists because each image is decoded in your browser memory; 50 screenshots already use a noticeable chunk on a typical laptop. For larger batches, run the tool in two passes and merge the resulting PDFs with our Merge tool.
Yes. PNG is a lossless format, and pdf-lib embeds it without re-encoding, so every pixel of your screenshot lands in the PDF exactly as it was. The image will render sharply on any zoom level inside a PDF viewer — much sharper than the JPG path would, which is why screenshots, diagrams, and UI mockups should use this tool over JPG to PDF.
No. Every image stays in your browser. The PDF is built locally with pdf-lib — no upload, no temporary server-side file, no logs. You can verify this in your browser's Network tab while you run the conversion, or simply unplug from the internet — the tool still works.
A PDF wraps each image plus page metadata, fonts, and a structure tree, which adds a few KB of overhead per page. For very small PNGs (icons, thumbnails) this can make the PDF noticeably larger than the source files. For typical screenshots and photos the overhead is negligible. If file size matters, run the result through our Compress PDF tool.
Tips for best results
- Use Auto page size for screenshots. "Auto" matches the image proportions exactly — best when you want pixel-perfect screenshots, no margins, no scaling.
- Pick A4 or Letter for printable docs. Use them when the PDF needs to look right on paper. European recipients usually expect A4; U.S. recipients usually expect Letter.
- Reorder before you build. Drag the thumbnails into the order you want the pages to appear. Reordering inside the resulting PDF means opening Organize PDF afterwards.
- Keep PNG for sharp content; switch to JPG for photos. If you're scanning photographs or photographing receipts, JPG to PDF is smaller. PNG to PDF is for screenshots, logos, and diagrams.
- Compress the result if needed. Lossless PNG bytes can balloon a multi-page PDF. Pipe the output through Compress PDF for an easy size reduction.
Related PDF tools
- JPG to PDF — better for photos, where lossless PNG gives no visible benefit.
- PDF to PNG — the inverse: turn PDF pages back into PNG images.
- Merge PDF — combine the new PDF with other PDFs into one document.
- Compress PDF — shrink the resulting PDF if it is too large to email.