PNG to PDF Converter: Free, Private, No Upload

Convert PNG files to PDF in your browser. Smaller output file, batch up to 20 files at once, no upload, no account, no watermark. Your files never leave your device.

PNG to PDF
Batch up to 20 files
No upload, no account
Metadata stripped

1Add up to 20 images
2Pick from 18 formats
3Download or copy the code

Processed on your device. Your images are never uploaded, and metadata is stripped. How we keep it private

How do I convert PNG to PDF for free?

Drop your PNG files into the tool above, choose PDF as output, and download the result. Everything runs in your browser, so nothing is uploaded and there is no limit or watermark. It works on Windows, Mac, Linux, ChromeOS, iOS and Android — anywhere you have a modern browser.

Price: Free, no credits and no daily cap
Account required: No
File uploaded to server: No, processed locally in your browser
Batch limit: Up to 20 files at once
Input format: PNG
Output format: PDF
Best for: PDF workflows, smaller files, faster sharing
Works on: Chrome, Edge, Firefox, Safari, iOS and Android browsers
Privacy: No upload, no tracking, metadata stripped
Output quality: Adjustable 1-100, defaults to 90

How to convert PNG to PDF

1
Drop your PNG files
Drag up to 20 PNG files onto the page or click to choose them. Everything runs in your browser.
2
PDF is preselected
Output is already set to PDF. Adjust quality, resize or batch if you want.
3
Download
Save each PDF, or download all of them together as a ZIP.

PNG to PDF: what changes and when it makes sense

PNG is a Portable Network Graphics format. It is best known for exact pixel reproduction, crisp text and edges, and full alpha transparency. The main drawbacks are large files for photographs and no lossy mode for trading quality against size.

PDF is a Portable Document Format. It is best known for a fixed layout that prints and displays identically everywhere. The main drawbacks are not being an image format, so pages cannot be dropped into an img tag without rendering them first.

PNG vs PDF at a glance

Property	PNG	PDF
Type	Raster image	Container format
Compression	Lossless (DEFLATE), with an optional 8-bit palette mode	A container for text, vector shapes and images. Embedded photos are usually JPEG or lossless Flate
Transparency	Full alpha channel with soft edges	Pages render on an opaque background
Animation	No	No
Colour depth	8 or 16 bits per channel, or 8-bit indexed colour	Depends on the embedded images
Support	Opens in every browser and image editor	Opens on every device, with a built-in viewer in all major browsers
History	Created in 1995 as a free, patent-unencumbered replacement for GIF after Unisys began charging royalties for LZW compression. Became a W3C Recommendation in 2003. The signature bytes are 89 50 4E 47 0D 0A 1A 0A — "PNG" with newlines designed to catch file corruption.	Developed by Adobe in 1993 as a way to share documents with fixed layout. Became an open ISO standard (ISO 32000) in 2008. PDF 2.0 (ISO 32000-2) was released in 2017. The most common document format for business globally.

What actually changes in this conversion

The PNG image is placed on a PDF page. The PDF is mainly a wrapper around the image.
PDF cannot store transparency, so transparent areas are filled with white.
EXIF, GPS and camera data are stripped on every conversion. That is good for privacy, but you lose capture dates.

About PNG: history and technical details

Created in 1995 as a free, patent-unencumbered replacement for GIF after Unisys began charging royalties for LZW compression. Became a W3C Recommendation in 2003. The signature bytes are 89 50 4E 47 0D 0A 1A 0A — "PNG" with newlines designed to catch file corruption.

Technical: Uses DEFLATE (LZ77 + Huffman) compression. Two main modes: 8/16-bit truecolour with alpha, and 8-bit indexed with up to 256 colours. Filters per scanline (None, Sub, Up, Average, Paeth) before DEFLATE for better ratios.

Real-world size: A 1920x1080 screenshot is 200-600 KB as PNG. As JPG at quality 85 it is 100-300 KB but with blurry text. A 12-MP photo is 18-25 MB as PNG, 2-4 MB as JPG. PNG wins on text, JPG wins on photos.

Popular tools: Adobe Photoshop, GIMP, Figma, Sketch, Snipping Tool, macOS Screenshot, ImageMagick, pngquant, oxipng.

Alternatives: WebP lossless (20-30% smaller), AVIF (better for photos), JPG (photos only), SVG (vector graphics).

About PDF: what you get

Developed by Adobe in 1993 as a way to share documents with fixed layout. Became an open ISO standard (ISO 32000) in 2008. PDF 2.0 (ISO 32000-2) was released in 2017. The most common document format for business globally.

Technical: Object-based file structure with cross-reference tables. Supports text, vector graphics, images, fonts, forms, JavaScript and digital signatures. Pages are rendered to a fixed canvas. Can embed JPEG, PNG, JPEG 2000 and JBIG2 images.

Real-world size: A scanned A4 document at 300 DPI is 1-5 MB. The same pages as JPG are 200 KB to 1 MB each. A text PDF of 100 pages is 200-500 KB. A photo-heavy PDF can be 50-100 MB.

Popular tools: Adobe Acrobat, Preview (macOS), Foxit Reader, SumatraPDF, Chrome (built-in viewer), Ghostscript, qpdf.

Alternatives: Word document (editable), HTML (web-native), JPG/PNG (single page), ePub (eBooks).

Browser and software compatibility

PNG: Opens in every browser and image editor. PDF: Opens on every device, with a built-in viewer in all major browsers.

PDF output opens on every device, and almost every portal that accepts documents accepts PDF.

Why people move away from PNG

A PNG of a photograph is commonly several times larger than the same image as JPG or WebP, which hurts page weight.
Screenshots and photos exported as PNG are among the heaviest assets on many sites.
Some upload forms and print services reject PNG or downscale it aggressively.

Why people choose PDF

PDF is the expected format for applications, forms, invoices and anything that will be printed.
An image placed in a PDF looks the same on every device and prints at the right size.
Many portals accept PDF only for ID and proof documents.

Common mistakes with PNG

Using PNG for photographs — files are 5-10x larger than JPG with no visible benefit
Saving screenshots as JPG by mistake — text becomes blurry and unreadable
Forgetting PNG transparency — white backgrounds appear where there should be alpha

Common PNG to PDF scenarios

Screenshots as documents: A PDF is easier to attach to a ticket or expense report.
Print-ready handouts: A PDF keeps the layout and prints at the expected size.
Design proofs: A PDF shows exact layout that clients can review.

Best practices for keeping quality

PNG sources often contain transparency. Decide before converting what should replace it: white, black or a brand colour.
Order and orientation matter, so check them before saving, especially for photos taken sideways on a phone.
A photo of a document stays a photo inside the PDF. The text will not be searchable unless you run OCR.
Resize before converting if the image will be shown small. A 4000 pixel photo displayed at 800 pixels wastes bytes in any format.
Check the result at 100 percent zoom, especially around text, edges and gradients, before you replace any originals.
Keep your original files. Conversions to a lossy format cannot be undone.
When you convert a set of images, use the same quality setting for the whole batch. The converter handles up to 20 files at once.

PNG to PDF questions

Quick answers about privacy, quality, supported formats, file limits and how PDF works.

Why convert PNG to PDF?

PDF files are typically smaller than PNG, which makes them faster to share, send and load. The trade-off is a small amount of image detail at low quality settings.

Will converting PNG to PDF lose quality?

At 90% quality, most people cannot tell the difference. Use 85-95% for photos and you are fine.

Does PDF keep transparency?

No. PDF does not support transparency. Transparent areas will be filled with white.

Are my files uploaded?

Never. Everything runs in your browser. Your files never leave your device. Open DevTools Network tab while processing — you will see no upload request.

Can I convert many files at once?

Yes, up to 20 files at once. Download them individually or all together as a ZIP.

Does the converter strip metadata?

Yes. Browsers do not pass EXIF data through a canvas, so GPS, camera model and dates are removed on every conversion. That is good for privacy.

Is it free?

Yes. No credits, no daily cap, no account, no watermark. The practical limit is your device memory.

Can browsers display PDF?

Yes. Chrome, Edge, Firefox and Safari all have built-in PDF viewers. On mobile, PDF opens in the OS viewer. You can also use the browser to render a page as an image.

Why does my PDF-to-image look blurry?

Browser PDF rendering produces a fixed resolution. If you convert at 800px width and view at 1600px, it will blur. Convert at a higher resolution (1200-2400 px) for print or high-DPI use.

Your files never leave your device

No upload, no account, no tracking. Everything happens in your browser using the Canvas API and WebAssembly. You can confirm this in your browser's DevTools Network tab while the tool runs — no request carries your file. See why ToolDeck is different.