LooPDF

Convert PNG to PDF

Convert PNG image files to PDF format. Upload a single PNG file to create a PDF.

Drop PNG files here or click to browse
Select one or more PNG image files to convert to PDF
PNG to PDF

PNG to PDF without losing a pixel

How to convert PNG files to PDF: drop them in below and each one becomes a page, at full quality.

Screenshots, charts, diagrams and logos are usually PNG files: hard edges, flat areas of color, small text that has to stay readable. This converter unpacks the image and stores its pixels in the PDF with lossless compression, so no blur or blocky artifacts creep in.

Each PNG becomes its own page, sized for that image rather than sharing a fixed canvas with the others, so a tall diagram and a wide screenshot can sit one after another without either being squeezed.

The downloaded file takes its name from the first PNG you added, with the site's name appended, whether the PDF ends up with one page or several.

Page Size

Choose the page your PNG sits on

Horizontal under Page Orientation turns the three paper sizes on their side.

  • A4 Default

    The image is centered on a 210 by 297 mm sheet and scaled to fit, up or down, so a small image is enlarged to fill it and can look soft.

  • Letter

    The same fitting on the 8.5 by 11 inch US sheet.

  • Legal

    8.5 by 14 inches: the extra length suits tall captures such as a full-page screenshot.

  • Auto (Match Image)

    The page takes the image's own size, one pixel to one point, with no margin and no enlarging. A good fit for screenshots.

Transparency

What stays and what changes in a transparent PNG

A PNG can carry a full range of opacity, from fully see-through to fully solid, and that range is stored in the PDF as a mask alongside the pixels. Soft edges on a logo or a drop shadow with a fading tail keep their gradient instead of turning into a hard cut-out.

There is no page color to set: wherever the PNG is see-through, the PDF page shows through as plain white, the way a printed page would. If a design element only reads well against a dark background, add that background before converting.

None of this depends on the Page Size you pick. A4, Letter, Legal and Auto (Match Image) all keep the same mask, so the choice only changes how much white space surrounds the picture, not whether it stays transparent.

Stays

  • Every level of opacity, not just on or off
  • Sharp edges on flat-color art
  • The exact color values of every pixel

Changes

  • 16-bit color drops to 8 bits per channel
  • See-through areas show the white page
  • The file usually grows, since PDF pages are not compressed the way a PNG is
When it helps

When to convert PNG to PDF

  • Screenshots for a guide or bug report

    Several captures become one document that reads in order, instead of a folder of loose images.

  • Charts exported from a dashboard

    Collected into a PDF, they are ready to attach to a report or an email.

  • Wireframes and diagrams for a client

    Design exports go out as one file that opens in any PDF viewer.

  • Pages from a scanner app

    Some scanner apps save PNG by default. Turn the pages into one PDF to file them together.

  • Logos kept ready for reuse

    A set of logo variants with transparent backgrounds becomes one reference document for a brand kit.

  • Icons exported from a design tool

    A full icon set, one PNG per icon, becomes a single sheet a developer can page through.

PNG to PDF questions

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No. An animated PNG is refused, and because the files are converted as one batch, the whole conversion stops with an error. Save the frame you need as a still PNG first, or use Images to PDF, which skips a file it can't read and converts the rest.

They are reduced to 8 bits per channel, the depth of an ordinary PNG, so the extra precision is not kept.

This page is built for PNG files. Images to PDF is made for mixed batches: it takes both, and other formats too, in a single PDF.

Yes, with PDF to PNG, which saves each page as an image. It captures the whole page, so any white space around your picture comes along.

A PDF page stores pixels without the compression tricks a PNG uses, so the total is usually larger. Compress PDF can bring the file back down afterward.

Yes. Each PNG gets its own page sized for that image, so a tall poster mockup and a wide banner can sit in the same file without either being distorted.

The whole conversion stops with an error rather than skipping the bad file, so no PDF is produced. Remove the file that is failing and convert the rest again.