Picovert

How to Convert PNG to PDF Free: 5 Easy Methods

By Picovert Team2026-04-305 min read

PNG is a popular lossless image format — perfect for screenshots, diagrams, logos, and graphics with transparency. But when you need to share or print these images, PDF is often the better choice: it preserves layout, combines multiple images into one file, and is universally supported by document viewers. Here are five free methods to convert PNG to PDF without losing image quality.

Why Convert PNG to PDF?

  • Sharing — PDFs open on any device without needing a specific image viewer, and the layout stays consistent.
  • Printing — PDF gives you control over page size, margins, and orientation for a professional print result.
  • Combining multiple images — Merge several PNG files into a single multi-page PDF document instead of sending a folder of images.
  • Document submission — Many government and business portals only accept PDF uploads for scanned documents and ID photos.
  • Archiving — PDFs are better for long-term storage and remain readable regardless of OS or image software.

Method 1: Online Converter (Fastest, No Software)

Use Picovert's Image to PDF converter — it runs entirely in your browser using jsPDF. No files are uploaded to a server, no account is required, and there are no file size limits beyond your device memory.

  1. Open the Image to PDF converter.
  2. Drop your PNG files. You can add up to 20 images at once — JPG, WebP, and AVIF are also supported.
  3. Drag to reorder pages if needed.
  4. Click "Convert to PDF" and download the result instantly.

Each PNG becomes one page in the PDF. The tool auto-detects portrait vs. landscape orientation and scales the image to fit the A4 page while preserving the aspect ratio. Because PNG is lossless, the image data is embedded into the PDF without additional quality loss.

Method 2: Windows — Print to PDF

Windows has a built-in "Microsoft Print to PDF" virtual printer that converts any printable file to PDF:

  1. Open the PNG file in the Windows Photos app (double-click to open).
  2. Press Ctrl+P (or click the three-dot menu → Print).
  3. In the printer dropdown, select Microsoft Print to PDF.
  4. Choose page size (A4 or Letter) and orientation, then click Print.
  5. Choose a save location and filename. Windows saves the PDF immediately.

This method works for single images. For multiple PNGs, you would need to repeat the process for each file or use the multi-file method described below.

Method 3: Mac — Save as PDF via Print Dialog

macOS has native PDF export built into the print system — no third-party software required:

  1. Open the PNG in Preview (double-click the file, or right-click → Open With → Preview).
  2. Press Cmd+P to open the Print dialog.
  3. In the bottom-left corner, click the PDF dropdown button.
  4. Select Save as PDF, choose a filename and location, then click Save.

The PNG is embedded into the PDF at its original resolution. Preview also lets you set page size and scale before saving — useful when you need a specific paper format like Letter or A3.

Method 4: Merge Multiple PNGs into One PDF

If you have several PNG files to combine into a single multi-page PDF, here are the best approaches:

  • Picovert (online) — Drop all your PNG files at once into Image to PDF, reorder them as needed, then click Convert. This is the easiest cross-platform option.
  • Mac Preview — Open all PNGs together in Preview (select all files in Finder, right-click → Open With → Preview). In Preview, open the sidebar (View → Thumbnails) to see all images as pages. Go to File → Print → PDF → Save as PDF to export the entire set as one document.
  • macOS Quick Action — In Finder, select multiple PNG files, right-click, and choose Quick Actions → Create PDF. macOS generates a multi-page PDF from the selected images in one click.
  • Windows Photos — Select multiple PNG files in Explorer, right-click → Print, choose Microsoft Print to PDF. Windows places each image on a separate page in the output PDF.

Method 5: Command Line — ImageMagick

For batch processing or automation, ImageMagick is the best free command-line option. It is available on Mac (via Homebrew), Windows, and Linux.

  1. Install on Mac: brew install imagemagick
  2. Single file: convert input.png output.pdf
  3. Multiple PNGs to one PDF: convert *.png output.pdf
  4. With quality control: convert -quality 85 *.png output.pdf

The convert *.png output.pdf command processes all PNG files in the current folder alphabetically and places each on a separate page. Use -quality 85 to control the JPEG compression applied to images inside the PDF — higher values preserve more detail at the cost of larger file size. For screenshots and graphics, quality 85–95 is a good range.

Page Size and Quality Notes

Most tools use standard paper sizes for PDF pages:

  • A4 — 595 × 842 pt (210 × 297 mm). Standard in most of the world.
  • Letter — 612 × 792 pt (8.5 × 11 in). Standard in North America.

Most converters auto-fit the image to the page while maintaining its aspect ratio. If the image dimensions match the page exactly (e.g., a 2480×3508 px image on A4 at 300 DPI), the image fills the page perfectly at print quality.

Because PNG is a lossless format, converting a PNG to PDF does not degrade image quality. The PDF simply embeds the PNG pixel data. The file size of the resulting PDF will be close to the original PNG size (plus minimal PDF metadata overhead). If the PDF is large, you can compress the images first before converting.

Quick Summary

  • Easiest (any OS): Picovert Image to PDF — browser-based, no install, supports batch upload
  • Windows built-in: Photos app → Ctrl+P → Microsoft Print to PDF
  • Mac built-in: Preview → Cmd+P → PDF → Save as PDF
  • Mac multi-image: Finder → select all PNGs → Quick Actions → Create PDF
  • Command line: convert *.png output.pdf (ImageMagick)