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PNG to PDF

Assemble PNG technical figures into a PDF and preserve transparent diagram backgrounds when needed. Each figure becomes one page in the listed order.

Synthetic example — review the operation settings before running.

Your documents stay on this device. Tool downloads and usage statistics do not include file contents.

Local limits: Max total size: 40 MB

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A practical guide

Keep figures legible in the record.

  1. Select the PNG figures and order them by section or figure number.
  2. Choose page dimensions and keep original preparation if transparency is part of the figure.
  3. Create the PDF and inspect labels, margins and background rendering.

Try this example

Choose three PNG figures labelled overview, detail A and detail B. Create a three-page file with original preparation and verify transparent layers against the PDF viewer background.

Before

  • PNG 1
  • PNG 2

After · one PDF

  • 2-page PDF
Input and expected output for this task. Illustrative example.

Before you start: This preserves image content as pages; it does not check the figures against a technical specification.

Number the image PDF
What you get

Convert PNG images to one PDF. Original mode preserves image transparency; JPEG preparation fills transparent areas white.

Limits and important details

Original mode: 40 images, 40 MiB input, 16 MP per image / 40 MP total; no EXIF correction. Optional preparation: 10 images, 10 MiB each, 40 MiB total, 12 MP per image / 24 MP total before decode, 40 MiB output. Preparation applies browser EXIF orientation and downsizes without upscaling. JPEG is lossy and fills transparency white; PNG preserves transparency. Image size uses prepared dimensions as PDF points. No HEIC or OCR; limits are not a total memory guarantee.

Example

Choose two PNG images and keep original preparation. Create a two-page PDF and inspect transparent areas against the PDF viewer background. JPEG preparation fills transparency white.