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PNG2PDF

Free PNG to PDF converter

PNG to PDF, free and in seconds

PNG2PDF is a free converter that turns PNG images into a PDF inside your browser tab: add up to 50 pictures, arrange them, and each one becomes a page. Nothing is uploaded, no account is needed, no watermark is added, and in lossless mode the PDF keeps every original pixel — transparency included.

Drop a file, paste a screenshot, or pick images from your device — then choose fit-to-image, A4 or US Letter pages and download the result.

  • 100% free
  • No signup
  • No upload
  • Up to 50 pages
  • Keeps transparency
PDF settings
.pdf

Nothing is uploaded — conversion runs in this tab

The converter itself needs JavaScript. Everything else on this page — the steps, the specifications, the answers below — reads fine without it.

How to convert PNG to PDF

Four steps, none of which involve a server. Your pictures stay in this tab from start to finish.

  1. Add your PNG files

    Drag them onto the box above, click it to browse your device, or press Ctrl+V (Cmd+V on a Mac) to paste a screenshot straight from the clipboard. Up to 50 pictures per PDF, 50 MB each.

  2. Put the pages in order

    The thumbnails are the page order. Arrows move a picture forward or back, Sort A→Z lines up files named scan-1, scan-2, scan-10 the way a human would, and the rotate button turns a sideways photo upright.

  3. Choose the page setup

    Fit to image gives every page the size of its picture. A4 or US Letter centres it on a printable page with a margin of 0, 6, 13 or 19 mm. Lossless keeps the original pixels; Compact re-encodes as JPEG for a much smaller file.

  4. Convert and download

    Press Convert to PDF. The document is assembled on your device — a progress bar shows which picture is being written — and the download button appears with the finished page count and file size.

Technical specifications

Input formatsPNG (primary), plus JPG/JPEG, WebP, GIF, BMP and AVIF
Output formatPDF 1.7 — one picture per page, no password, no watermark
Batch limit50 pictures per PDF, 50 MB per picture
Maximum resolution16 megapixels per picture; anything larger is scaled down to fit the browser's canvas limit
Page sizesFit to image (96 DPI, 1 px = 0.75 pt), A4 (210 × 297 mm), US Letter (8.5 × 11 in)
Margins0, 6, 13 or 19 mm, applied on all four sides
Lossless modeOriginal RGB samples deflated into the PDF (/FlateDecode) — pixel-identical to the PNG
Compact modeRe-encoded as JPEG at quality 85 (/DCTDecode) for a much smaller file
TransparencyKept as an 8-bit soft mask in lossless mode; flattened onto white in compact mode
Processing locationYour browser tab — Canvas 2D and Compression Streams, no server involved
PriceFree, no signup, no watermark, no daily quota
Offline useWorks with the network disconnected once the page has loaded
Browser supportChrome/Edge 80+, Firefox 113+, Safari 16.4+ for lossless; compact mode works in older browsers too

Frequently asked questions

How do I convert a PNG to PDF?

Drop the PNG onto the box at the top of this page and press Convert to PDF — the download button appears a moment later. You can also paste a screenshot with Ctrl+V instead of choosing a file, and add up to 50 pictures if you want them in a single document.

Is this PNG to PDF converter free?

Yes, entirely: no account, no email address, no watermark on the pages and no daily cap on conversions. The work runs on your own hardware instead of a rented server, so there is nothing to bill for.

How do I combine several PNG files into one PDF?

Add every picture, leave “Combine into one PDF” ticked, and press Convert — each one becomes a page, in the order the thumbnails show. Use the arrow buttons to move a page, or Sort A→Z to line up files named scan-1, scan-2 and scan-10 in natural order. Untick the box instead and you get one PDF per picture, downloadable together as a .zip.

Does the converter send my pictures anywhere?

No. Your pictures are decoded, laid out and written into the PDF by code running in this browser tab, so no file, filename or pixel reaches a server. You can verify it: open your browser's network panel while converting, or switch off your connection once the page has loaded — the converter keeps working.

Does the PDF keep the PNG's quality and transparency?

Yes, in the default Lossless mode. The PNG's exact RGB samples are deflate-compressed straight into the PDF, and an alpha channel travels with them as an 8-bit soft mask, so a transparent logo stays transparent over the page. Compact mode instead re-encodes each picture as JPEG at quality 85 and flattens transparency onto white.

How do I make the PDF file smaller?

Switch Image quality to Compact. Lossless embeds the raw pixels, so a PDF built from photographs lands in the same size range as the PNGs themselves; Compact re-encodes them as quality-85 JPEG, which usually removes most of that weight. Cropping or resizing the pictures before you convert helps too, since page size follows the pixels.

Can I convert PNG to PDF on an iPhone or Android phone?

Yes — this is a web page, not an app, so it runs in Safari on iOS 16.4 and newer and in Chrome on Android with nothing to install. Tap the drop area to reach your camera roll or Files, and the finished PDF is saved wherever your browser puts downloads.

Can I get A4 or US Letter pages instead of image-sized ones?

Yes. Pick A4 (210 × 297 mm) or US Letter (8.5 × 11 in) from the Page size menu and each picture is scaled to fit and centred on a print-ready page. The default, Fit to image, makes the page exactly as large as the picture at 96 DPI, which suits screenshots that will only ever be read on screen.

About this tool

PNG2PDF exists for the everyday version of this task: a folder of screenshots that has to go out as one document, a photographed form a school or landlord wants as a PDF, a set of scans that need to be in the right order. It does that one job, without an account and without handing your files to anyone.

The conversion is genuinely local. Each picture is decoded by the browser, drawn to a canvas — which is also where a rotation is applied — and then written into the PDF as an image object. In lossless mode the raw RGB samples are compressed with the browser's built-in deflate and embedded unchanged, with any alpha channel attached as a soft mask; in compact mode the page is re-encoded as JPEG instead. The PDF file itself, down to the cross-reference table, is assembled by this site's own code rather than a hosted API.

The honest limits: 50 pictures and 50 MB per picture per run, 16 megapixels per page before the browser's canvas ceiling forces a downscale, and no OCR — the pages are pictures, so the text inside them is not searchable. Lossless output is as large as the pixels demand, which is exactly why compact mode is one dropdown away.

Other conversions on this site

Your pictures stay on your device

There is no upload step to opt out of: the PDF is built by JavaScript in this tab, so your images are never transmitted, stored or looked at by us. Close the tab and the in-memory copies are gone — nothing is written to storage, and the converter keeps working even with the network switched off.