PNG to PDF Converter

Convert PNG images to PDF instantly — preserves transparency, no watermark, no signup. 100% browser-based, your files never leave your device. Free online.

How to use

  1. Upload PNG files — Drag and drop one or more PNG images — transparency is preserved in the PDF
  2. Pick page settings — Fit-to-image keeps the original size; A4 or US Letter centres each image with margin
  3. Download PDF — Get a single combined PDF — each PNG becomes a separate page

What Is PNG to PDF Conversion?

PNG to PDF combines one or more PNG images into a single PDF document where each image becomes a page. PNG is the dominant format for screenshots, UI mockups, logos, and any graphic that needs a transparent background. PDF is the universal document format — it prints identically on every device, fits inside email attachments, and is required by virtually every job portal, government form, and university submission system. This tool builds the PDF entirely in your browser using pdf-lib, so your PNGs never leave your device.

Why Convert PNG to PDF?

  • Submission requirements: Most application forms accept PDF only — not PNG. Convert before upload.
  • Bundled deliverables: Combine many UI screenshots, design exports, or document scans into one neat file.
  • Print accuracy: PDF preserves exact dimensions and DPI, so an A4 page prints as A4.
  • Transparency preserved: Unlike JPG, PNG carries an alpha channel — pdf-lib keeps it intact inside the PDF.
  • Email-friendly: One small PDF is easier to send than ten loose PNG attachments.

How This Tool Works

Each PNG is read into the browser, decoded by pdf-lib, and embedded as a vector-perfect raster inside a new PDF page. Three page-sizing modes are available:

  • Fit to image: each PDF page exactly matches the source PNG dimensions plus margin. Best for screenshots and design mockups.
  • A4 (210×297 mm): each image is centred inside an A4 page in portrait or landscape orientation. Best for printable documents and resume scans.
  • US Letter (8.5×11 in): same as A4, with the US standard page size. Best for North American submissions.

Margins, orientation, and page order are all adjustable. You can reorder pages with the ↑ / ↓ buttons or remove any file before generating.

Privacy and Security

Every step happens inside your browser tab. The PNGs are never uploaded to any server — there is no upload progress bar because there is no upload. This matters when the images contain private medical scans, confidential UI designs, signed documents, or screenshots of private dashboards. No watermarks are added, no account is required, and no usage data is collected.

Comparison with Online PDF Converters

Most "convert PNG to PDF online" services upload your files, run conversion on their servers, and return a watermarked or rate-limited PDF. This tool is different — there is no upload, no queue, no watermark, no daily limit. The conversion is instant for typical screenshot sizes and scales to dozens of high-resolution PNGs without slowing your network.

Need other formats? Try JPG and PNG to PDF (combined), PNG to JPG, or compress the resulting PDF with the PDF Compressor.

Frequently asked questions

Does it keep PNG transparency?

Yes. pdf-lib embeds PNG images with their alpha channel intact, so transparent backgrounds stay transparent in the resulting PDF (visible when viewed against coloured PDF backgrounds).

Is there a file-size limit?

No fixed limit — the tool runs in your browser, so memory available to the tab is the only constraint. Most laptops handle 100+ PNG screenshots comfortably.

Can I reorder pages?

Yes. Use the ↑ / ↓ buttons next to each file to reorder before generating. The PDF is built in the listed order.

Are PNGs uploaded to a server?

Never. The PDF is assembled entirely in your browser using pdf-lib. Your screenshots, designs, and private images stay on your device.

Will image quality be reduced?

No. PNG is a lossless format and is embedded as-is. The PDF carries the exact pixel data of each original PNG.

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