PNG to PDF Converter – Free, Instant & Preview Online

Why Convert PNG to PDF?

Converting PNG to PDF turns graphics, screenshots, or diagrams into one document. Combine multiple PNGs with reorder and rotation; transparency is preserved in the PDF. Set fit mode, custom filename, and preview before download. Ideal for design exports, reports, and archives.

Convert PNG images into a single PDF with custom page size and margins.

Convert PNG images into a single PDF. Reorder, rotate, set fit mode, preserve transparency, preview, and download.

PNG to PDF · Page size & margins
Reorder & rotate pages
Transparency preserved

Benefits

Lossless quality: PNG quality and transparency preserved in PDF
Reorder & rotate: Drag to reorder; rotate any image 90° before converting
Fit & preview:Set fit mode; preview the PDF; convert again if needed
Universal format: PDFs open everywhere; custom filename supported

How to Convert PNG to PDF Online

Convert one or more PNG images into a single PDF with reorder, rotation, and preview. Transparency is preserved.

1Upload PNG images: Select one or more PNG files. You can add more later without clearing.
2Reorder and rotate: Drag thumbnails to reorder pages. Use the rotate button on any image to turn it 90° clockwise. Set page size, orientation, margins, and fit mode.
3Set options and convert: Choose image fit (fit, fill, actual size, stretch) and custom output filename. PNG with transparency is embedded as PNG in the PDF. Click Convert to PDF and preview.
4Download PDF: Download the PDF with your chosen filename. Use Convert again to try different settings without re-uploading.

Your JPGs and PNGs go in untouched

Most converters decode every photo and re-compress it before writing the PDF, which makes the document larger than the pictures that went into it and costs a second round of lossy compression on top of the one the camera already applied. This tool does not. A JPG that needs no rotating, resizing or recolouring is copied into the PDF exactly as you handed it over, byte for byte, and a PNG is copied the same way with its transparency intact.

The practical difference is large and it is easy to check: open the finished PDF's file size next to the total size of the images you added. Twenty 12-megapixel photos totalling 7.8 MB come out as a 7.85 MB PDF, and every page is the original picture rather than a copy of it.

Nothing is re-compressed: a photo in the PDF is the same data as the photo on your disk, so it never softens or gains blocky edges.
Transparency survives: a PNG with a transparent background keeps it, instead of being flattened onto white.
It is fast because it is not doing anything: with no decoding and no encoding, a twenty-page album is built in milliseconds.
You can turn it off: choose Smaller file and every page is re-encoded as JPEG at the quality you pick, which is the right trade when you need to email the result.

A page has to be re-encoded whenever you rotate it, convert it to greyscale, lower the resolution, or add a format PDF has no filter for (WebP, GIF, BMP, AVIF and SVG). The queue marks each page so you can see which is which. If the finished document is still bigger than you want, run it through the PDF compressor.

Page size, margins and how the image sits on the page

A PDF page has a fixed size and your images do not, so something has to give. This tool gives you both halves of that decision: what shape the page is, and what the image does inside it.

Page sizes

Fit to image: each page takes the shape of the image on it, so nothing is letterboxed and no white bars appear. This is the right choice for screenshots, receipts, product shots and anything that is not going to be printed.
A4: 210 x 297 mm, the standard almost everywhere outside North America.
Letter: 215.9 x 279.4 mm, the North American standard.
Legal: 215.9 x 355.6 mm, taller than Letter for contracts and forms.
A3: 297 x 420 mm, twice A4, for posters and plans.
A5: 148 x 210 mm, half A4, for booklets and handouts.

How the image fits

Fit: scaled down until the whole image sits inside the margins. Nothing is cut off and the proportions are kept.
Fill: scaled up until it covers the page edge to edge. The overflow is trimmed by the page boundary, which is what you want for a full-bleed slide.
Actual size: placed at the size it would print at, and shrunk only if that will not fit. A 1200 x 1800 pixel photo lands at about 317 x 476 mm before shrinking.
Stretch: forced to the margins on both axes, ignoring the image's proportions. It distorts, which is occasionally exactly what a background needs.

PNG to PDF Conversion Process

Upload PNGs: Select one or more PNG files; add more anytime
Reorder & rotate: Drag to reorder; use rotate button per image
Set options: Page size, orientation, margins, fit mode, custom filename
Convert & preview: Generate PDF (transparency preserved); preview; convert again if needed
Download: Download with your chosen filename

Which image formats work

The list below is the whole list, and it is enforced when you pick a file rather than after you press the button — so you never watch a progress bar that was always going to fail.

JPG / JPEG: embedded untouched. Progressive JPEGs and CMYK JPEGs are re-encoded, because PDF's own image filter does not cover them.
PNG: embedded untouched when it is greyscale, truecolour or palette-based. Interlaced PNGs and PNGs with an alpha channel are re-encoded, losslessly by default.
WebP: decoded and re-encoded; PDF has no WebP filter.
GIF: decoded and re-encoded. An animated GIF contributes its first frame, and the queue says so.
BMP: decoded and re-encoded. Usually much smaller in the PDF than it was on disk.
AVIF: decoded and re-encoded, where the device can open it.
SVG: drawn at up to 2048 pixels on its long side, then embedded as a picture.

What is turned away, and where to take it

Three things arrive here often and cannot be opened by any device on its own. Rather than accept them and fail, the tool names the format and sends you to the tool that handles it.

HEIC and HEIF, which is what an iPhone saves by default — convert HEIC to JPG first
TIFF, PSD and other editor formats — use the image converter
another PDF, which is a merge rather than a conversion — use the PDF merger

When to Use PNG to PDF vs JPG to PDF

Use PNG to PDF when your sources are PNG and you want lossless quality or transparency (graphics, screenshots, diagrams). Use JPG to PDF when your sources are JPG or you want smaller file size. For multiple image formats in one PDF, use the main Image to PDF tool.

PNG to PDF conversion facts

These points help you combine PNG assets into clean, faithful PDFs with transparency intact.

Key features

PNG-only workflow; ideal for graphics, UI assets, and screenshots with transparency
Transparent PNGs stay PNG inside the PDF when alpha is present
Drag-and-drop reorder and per-image rotation before conversion
Fit modes: fit, fill, actual size, stretch; custom output filename
Built-in PDF preview; add more PNGs without clearing; convert again with new settings

Best Practices

Follow these guidelines for better PDFs from your PNG files.

Quality and layout tips

PNG is lossless; the PDF reflects that quality
Choose fit mode to match intent: fit for full image, fill for full-page cover
Reorder and rotate before converting; use preview to verify transparency
Set a descriptive custom filename for the PDF

Common use cases

Design & UI: Export artboards or assets with transparency into one PDF
Documentation: Combine diagram or screenshot PNGs for sharing
Archives: Store related PNGs as a single searchable document
Print-ready: Control page size and margins for crisp output
Client delivery: One PDF attachment instead of many PNG files

How PNG to PDF conversion works

The tool loads each PNG, applies your rotation and order, scales images to the page using your fit mode, and embeds them—preserving PNG and transparency when present. You can preview the PDF and download it.

Technical steps

Upload & order: Add PNG files (and more later). Drag to reorder and rotate 90° per image. Order defines page sequence.
Page & fit: Set page size, orientation, margins, and image fit (fit, fill, actual size, stretch). Set output filename.
Embedding: Each image is processed with rotation. Images with transparency are embedded as PNG in the PDF; others may use JPEG per the tool logic. Placement follows your fit mode.
Preview & download: The PDF is built and shown in a preview. Convert again with different settings or download.
Transparency: PNG transparency is preserved when the page allows it.

Why it finishes so quickly

Two reasons. Pages that need no changes are copied rather than rebuilt, so most conversions do almost no work at all. Pages that do need changing — a rotation, greyscale, a lower resolution — are handled by your device's graphics hardware, and the work happens away from the page so the interface keeps responding and Cancel keeps working. Everything runs on your device; no image is ever sent anywhere.

Limits, and what Pro adds

Every setting on this page is free. Page size, orientation, margins, all four fit modes, greyscale, the compression choices, the resolution choices and all four presets work without an account. What the paid plan changes is scale, not capability.

Free: up to 150 images in one PDF, up to 50 MB each, embedded at up to 4096 pixels on the long side.
Pro: up to 500 images in one PDF, with no imposed size cap — the ceiling is what your own device can hold.
Pro, print-ready: images are embedded at their full resolution, which matters when the PDF is going to a printer rather than to a screen.
Pro, document details: a title and an author written into the PDF's properties, so the reader's title bar shows something better than the filename.

The full comparison is on the pricing page.

Frequently Asked Questions

Can I combine multiple PNGs into one PDF?

Yes. Upload multiple PNG images, drag to reorder, optionally rotate any image, set your options, and convert. Each image becomes one page. You can add more PNGs without clearing the list.

Is transparency preserved when converting PNG to PDF?

Yes. PNG images with transparency are embedded as PNG in the PDF, so transparency is preserved. Use the built-in preview to verify.

Can I reorder and rotate PNG images before converting?

Yes. Drag thumbnails to change page order and use the rotate button on each image for 90° clockwise. Order and rotation are applied when you click Convert to PDF.

Why use PNG to PDF instead of JPG to PDF?

Use PNG to PDF when your source files are PNG and you want lossless quality or transparency (e.g. graphics, screenshots, diagrams). Use JPG to PDF when your sources are JPG or you want smaller file size.

Can I set a custom filename for the PDF?

Yes. In PDF settings, set the Output filename (e.g. report.pdf). The .pdf extension is added automatically if you omit it.

How many PNGs can I convert at once?

You can add many PNG images. Limits depend on device memory and file sizes. PNG files can be larger than JPG; you can add more images after the first batch without clearing.

Does converting to PDF reduce my image quality?

Not by default. A JPG or PNG that needs no rotating, resizing or recolouring is written into the PDF exactly as you supplied it, so there is no second round of compression and no visible change at all. Quality is only re-encoded when you ask for something that requires it — a rotation, greyscale, a lower resolution, or the Smaller file setting.

Why is my PDF the same size as my photos?

Because it contains the same data. A PDF is a container, and the pictures inside it are your original files rather than copies. A little overhead is added for the page structure, which is why a 7.8 MB set of photos becomes roughly a 7.85 MB document.

Can I convert HEIC photos from my iPhone?

Not directly — no browser can decode HEIC on its own, so the tool refuses the file rather than accepting it and failing later. Convert the photos to JPG with the HEIC converter first, then bring them back here. Setting your iPhone camera to Most Compatible saves JPGs instead of HEIC in the first place.

Will a photo taken sideways come out sideways?

No. A photo from a phone carries an orientation tag rather than being stored the way it looks, and the tool reads that tag itself and turns the picture upright before placing it. The queue says so on any image where it applied, and you can still rotate any page by hand on top of that.

How do I make the PDF as small as possible?

Choose Smaller file, drop the JPEG quality to around 70 percent, and set the resolution to 150 DPI — or 96 DPI if it will only ever be read on a screen. Greyscale takes roughly another third off for scans and text documents. The estimated output size beside the button updates as you change each of these.

Can I put a page in landscape and the next one in portrait?

Yes. Set Orientation to Auto and each page turns to match its own image, so a mixed folder of landscape and portrait shots comes out with no letterboxing on either. Fit to image goes further and gives every page the exact shape of the picture on it.