How is PNG transparency handled in the PDF?

png-to-pdf uses pdf-lib's PNG embedding, which preserves alpha transparency where the PDF format supports it. For backgrounds, the PDF page has a white default, so transparent areas will appear white in most PDF viewers.

Can I convert screenshots to PDF?

Yes. PNG is the most common format for screenshots. Drop your screenshot PNGs onto the tool, arrange them in order, and download the combined PDF.

What is the maximum file size per image?

Each image can be up to 50 MB, 50 megapixels, and 10,000 pixels on its longest side. Larger files are refused with a message. Large PNG files (over 10 MB each) may take a second or two to process.

Can I mix PNG and JPEG images?

Yes. The tool accepts JPEG, PNG, WebP, and GIF images in the same conversion. JPEG and PNG are embedded directly with pdf-lib, while WebP and GIF are converted to JPEG first because the PDF format cannot store them. JPEG has no transparency, so their transparent areas become white.

Is the conversion free?

Yes, completely free. No account, no sign-up, and no watermarks added to your PDF.

PNG to PDF

Turn PNG images into a PDF file, entirely in your browser. Drop your PNGs, arrange the order, and download a PDF where each image occupies one page at its original dimensions. All conversion runs locally.

Drop images here or click to browse

JPEG, PNG, WebP, GIF. Add multiple to combine into one PDF

How it works

The tool uses pdf-lib, a JavaScript PDF library, to create a new PDF document in your browser. Each image is read from disk, converted to the appropriate format if needed, and embedded into the PDF. JPEG images are embedded without re-encoding after their metadata (EXIF including GPS, XMP, IPTC, comments, C2PA, and thumbnails) is removed. PNG images use pdf-lib's PNG embedding, which keeps only the pixels. A rotated EXIF orientation in a JPEG or PNG is applied by rotating the page, and a mirrored, animated, or incomplete PNG is redrawn as PNG on an HTML canvas. WebP, GIF, mirrored JPEGs, and JPEGs or PNGs that cannot be read directly are drawn onto an HTML canvas and exported as JPEG first, with transparent areas filled white. Each page is sized to match its image exactly.

Processing runs in your browser

All processing happens locally in your browser tab. pdf-lib builds the PDF in memory, and our servers are not involved at any point.

Related operations

To shrink large photos before bundling them, try compress image. For consistent dimensions across pages, use resize image. To merge the resulting PDF with other documents, see merge PDF.

Frequently asked questions

How is PNG transparency handled in the PDF?: png-to-pdf uses pdf-lib's PNG embedding, which preserves alpha transparency where the PDF format supports it. For backgrounds, the PDF page has a white default, so transparent areas will appear white in most PDF viewers.
Can I convert screenshots to PDF?: Yes. PNG is the most common format for screenshots. Drop your screenshot PNGs onto the tool, arrange them in order, and download the combined PDF.
What is the maximum file size per image?: Each image can be up to 50 MB, 50 megapixels, and 10,000 pixels on its longest side. Larger files are refused with a message. Large PNG files (over 10 MB each) may take a second or two to process.
Can I mix PNG and JPEG images?: Yes. The tool accepts JPEG, PNG, WebP, and GIF images in the same conversion. JPEG and PNG are embedded directly with pdf-lib, while WebP and GIF are converted to JPEG first because the PDF format cannot store them. JPEG has no transparency, so their transparent areas become white.
Is the conversion free?: Yes, completely free. No account, no sign-up, and no watermarks added to your PDF.

Last reviewed September 30, 2026

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