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PNG to PDF Converter

Convert PNG images to PDF online for free. Transparency is flattened onto a clean white page. Upload your PNG and download the PDF in seconds.

Drop files here or click to upload

PNG · up to 20.0 MB per file

Files are private and deleted after conversion

How to use PNG to PDF Converter

  1. 01

    Upload your PNG

    Select or drag one or more PNG images into the converter, from your device or a design export.

  2. 02

    Transparency is flattened onto white

    Because PDF pages are opaque, any transparent pixels in your PNG are automatically composited onto a white background before the page is built.

  3. 03

    We build a single-page PDF sized to your image

    Using pdf-lib (no external renderer), the server creates a PDF page matching your PNG's exact pixel dimensions — 1 pixel ≈ 1 point — clamped to a safe ceiling of about 200 inches per side for unusually large images.

  4. 04

    Download your PDF

    Your PDF is ready in seconds via a secure signed link. Converting several PNGs at once produces one PDF per image, bundled together in a ZIP rather than a single merged PDF.

Why choose our PNG to PDF Converter

Full-resolution pixels

Beyond flattening transparency onto white, no extra compression is applied — your PNG's pixel data is embedded at full resolution.

Opens on any device

The output is a standard ISO 32000 PDF that opens in any reader, browser, or built-in phone/computer viewer.

Auto-deleted for privacy

Uploads use encrypted HTTPS; generated PDFs are removed within 24 hours and source images within 6–24 hours.

Free without an account

Anonymous visitors get one free server conversion; sign up only when you need more than 3 conversions per 30 days or batch conversion.

Fast, no external renderer

Because pdf-lib builds the PDF directly in JavaScript, conversion typically finishes in seconds even for large images.

Settings guide

Page size (automatic)
There is nothing to configure: the PDF page exactly matches your PNG at 1 pixel ≈ 1 point, with no margins, and EXIF orientation is applied automatically. If you need a specific paper size such as A4, resize the image before converting.
Transparency (automatic)
PDF pages are opaque, so transparent areas of your PNG are flattened onto a white page background automatically. If you want a different color behind your graphic, add a background to the PNG before converting.

About the formats

PNG

PNG is a lossless raster image format created in the mid-1990s as a patent-free replacement for GIF. It is the standard choice for screenshots, logos, UI graphics, and any image that needs transparency.

PNG preserves every pixel exactly and supports a full 8-bit alpha channel, so text and sharp edges stay crisp. The downside is size: photographs saved as PNG are far larger than the same image as JPG or WebP. Support is universal in browsers and editors, making it a safe default for graphics — just avoid it for large photo collections.

PDF

PDF (Portable Document Format) is a fixed-layout document standard created by Adobe in 1993 and standardized as ISO 32000. Because a PDF renders identically on every device, operating system, and printer, it is the default format for invoices, forms, reports, and anything meant to be shared or printed.

PDF is great for sharing and printing because the layout never shifts, but it is not an image editing format — content is hard to change once the file is created. Our tools can both generate PDFs from your images (each image becomes a one-page PDF, or merge several into one multi-page PDF) and read existing PDFs back into images via pdf-to-jpg and pdf-to-png.

Troubleshooting

Transparent areas turned white
That is expected: PDF pages are opaque, so PNG transparency is flattened onto the white page background. If you want a different backdrop, add a background color to the PNG before converting.
I wanted all my PNGs in ONE PDF
That's still how png-to-pdf itself works — each PNG converts into its own one-page PDF, bundled into a ZIP for batches. If you want everything in ONE combined PDF instead, use our images-to-pdf tool: it merges 2 or more images (PNG and/or JPG) into a single multi-page PDF, one page per image in upload order, for 1 credit per image merged.
My PDF page has odd dimensions
The page always equals your PNG dimensions at 1 pixel ≈ 1 point — a 1920×1080 screenshot yields a 1920×1080 pt page. There are no paper-size presets yet; resize the image first if you need specific proportions.

FAQ

What happens to transparent areas in my PNG?
PDF pages are opaque, so transparent pixels are flattened onto a white page background. This is expected — if you need a different color behind your graphic, add a background to the PNG before converting.
Can I put several PNGs into one multi-page PDF?
Yes — with a separate tool. Use images-to-pdf to merge 2 or more PNGs (or a mix of PNG and JPG) into one multi-page PDF, one page per image in upload order, for 1 credit per image merged. This png-to-pdf tool itself still converts each PNG into its own one-page PDF; batch jobs here still deliver a ZIP with one PDF per image.
Is the conversion private?
Yes. Files upload over an encrypted HTTPS connection, converted PDFs are automatically deleted within 24 hours, and uploaded originals are removed within 6–24 hours. We never share your files.
What are the file size and usage limits?
Anonymous visitors get 1 free server conversion with files up to 20 MB. A free account allows 50 MB per file, 3 conversions every 30 days, and batches of up to 5 files; paid users get 200 MB per file, batches of up to 100, and ZIP download.
How is my PDF's page size determined?
We use pdf-lib, a pure JavaScript PDF library with no external renderer, to build your file. It creates a page sized to your PNG's exact pixel dimensions, treating 1 pixel as 1 point, so a 1200×1600 image produces a 1200×1600 pt page — no cropping or paper-size preset is applied.
What happens if I upload an extremely high-resolution PNG?
Very large images are clamped to a safe ceiling of about 200 inches per side before the page is created. This keeps the PDF within dimensions every reader can open reliably; it only affects unusually huge graphics or scans, not typical screenshots or exports.
Does converting to PDF reduce my image's quality?
No extra recompression is applied beyond flattening transparency onto white. Your PNG's pixel data is embedded at full resolution, so the PDF looks the same as opening the PNG directly on a white background.
Do I need special software to open the PDF?
No. The file is a standard ISO 32000 PDF, so it opens correctly in any PDF reader, web browser, or the built-in viewer on your phone or computer — no special software required.

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