PNG to PDF Converter — Free, Private, No Upload
Drop your PNGs below and pick PDF as the output format. Drag in as many as you like at once. Each image becomes a centred, letter-sized page at full resolution — as one PDF per image, or combined into a single document; if you are not sure which you want, read this first. Free, no sign-up, no watermark, and nothing leaves your browser.
Drop images here or click to browse
Supports HEIC, WEBP, AVIF, BMP, TIFF, SVG, GIF, ICO, PDF, JPG, PNG
100% Private — Your files never leave your device
All conversion happens directly in your browser using JavaScript. Nothing is uploaded to any server. Your images stay on your computer the entire time.
Step-by-Step Guide
- Drag your .PNG files into the drop zone, or click to browse and select a whole folder.
- Choose PDF from the Output Format menu — the converter starts on JPG.
- Raise the quality slider above its 92% default if the image holds text, a screenshot, or line art.
- Download the PDFs. Convert several at once and you can merge them into one multi-page document, or take them all as a single ZIP.
The quality slider is live for PDF because the page carries a JPEG inside it. That is the one lossy step in the conversion, and it is the reason it deserves a moment's thought rather than a default — see what converting actually changes below.
Merging PNGs Into One PDF vs. Single-Page Export
These are two different jobs, and almost everyone searching for “PNG to PDF” wants one of them without knowing there is a choice. Work out which you need before you convert anything:
- Single-page export — each PNG becomes its own one-page PDF, delivered as a ZIP via Download All. It is what you want when the images are unrelated: three separate receipts for three separate expense claims, a logo a printer asked for as PDF, one screenshot attached to one support ticket.
- Merging — many PNGs become one PDF with a page each. Once at least two images have converted, a Combine into one PDF button appears above the list. Pages follow the file order, so if the sequence matters, drag the images in a few at a time. This is what you want when the images are a sequence: a contract photographed page by page, a scanned passport, a portfolio, anything a human will read front to back.
Merging here adds no extra quality loss — each image is compressed once when it converts, and the combined document re-uses those exact bytes, one page per image, each page turned to match its own picture.
Your operating system can also merge without a browser. Both major systems ship with it, free, and both will convert the PNGs for you along the way:
Mac
Select the PNGs in Finder, right-click, and choose Quick Actions → Create PDF. macOS writes a single multi-page PDF beside the originals, in file-name order — which is why naming them page-01.png, page-02.png beforehand saves a lot of dragging. To fix the order afterwards, open the PDF in Preview, show the thumbnail sidebar, and drag the pages around.
Windows
Select the PNGs in File Explorer, right-click, choose Print, and pick Microsoft Print to PDF as the printer. Set the layout to Full page photo and make sure Fit picture to frame is unticked, or Windows will crop the edges off anything that is not the exact aspect ratio of the sheet. The pages come out in the order you selected the files.
iPhone, iPad, or Android
On iOS, select the images in Photos, tap the share button, choose Print, then share again from the print preview and pick Save to Files. You get one PDF with a page per image. On Android, the same trick works through the print dialogue in Google Photos or Files, choosing Save as PDF as the destination.
Every one of these routes re-compresses the image exactly as this converter does, and none of them preserve transparency. The trade-offs below apply whichever you pick.
What Converting a PNG to PDF Actually Changes
A PDF page cannot hold a PNG. The format has embedded JPEG data natively since the 1990s, so that is what goes inside the page, and three things follow from it:
Transparency becomes white
JPEG has no alpha channel, so a transparent background has to become some colour. This converter composites the image onto white before encoding, which is the colour of the paper the page stands for. Other converters skip that step and inherit the browser's default, which is black — that is where the black boxes behind logos come from. If the transparency is the point, do not convert to PDF at all.
Lossless becomes lossy — and PNG's content is the worst case
PNG is lossless, so the file you started with is pixel-exact. The JPEG inside the PDF is not. That matters more here than for a photograph, because people reach for PNG precisely when an image has hard edges — screenshots, charts, diagrams, logos, text. Those are the edges JPEG smears, leaving faint halos around dark lines on light backgrounds. Push the quality slider well above 92% for anything with text in it. The encoded JPEG is then copied into the PDF byte for byte, so the loss happens once and never compounds.
The pixels stay, but the print resolution is fixed
Nothing is downscaled — a 1920 by 1080 screenshot goes into the PDF at 1920 by 1080. What changes is that a page is measured in inches rather than pixels, so those pixels get spread across the 10-inch-wide content area of a landscape Letter sheet: about 192 dots per inch. That is sharp on screen and fine for a reference printout, but it is below the 300 DPI print shops ask for. A 12-megapixel photo saved as PNG lands near 400 DPI and prints properly; a screenshot never will, because the pixels were never there to begin with.
If the destination accepts ordinary images, a PDF is usually the wrong answer — you want PNG to JPG, which makes the same trade for a smaller file and no document wrapper. Converting a folder of images and worried about what each step costs you? Batch convert images without losing quality covers the whole pipeline.
Frequently Asked Questions
How do I convert PNG to PDF free online?
Drop the PNG into the converter on this page and choose PDF as the output format. It is free with no sign-up, no file-count limit, no watermark, and no size cap beyond what your own browser can hold in memory. It is free because there is no server cost to cover: the conversion runs as JavaScript on your machine, so nothing is uploaded and nobody is paying for bandwidth. Most sites offering the same conversion do upload your files, which is why they ask for an email address or cap you at two files an hour.
How do I combine multiple PNGs into one PDF?
Drop them all in, choose PDF, and once at least two have converted a Combine into one PDF button appears. You get a single document with one image per page, in the order the files are listed. Download All is the alternative: the same images as separate one-page PDFs inside a ZIP. Merging adds no extra quality loss — each image is compressed once, and the combined document re-uses those exact bytes.
What happens to a transparent PNG background?
It turns white. A PDF page carries the image as a JPEG, and JPEG has no alpha channel at all, so the transparency has to go somewhere. This converter composites the image onto white first, which matches the paper the page represents. Skipping that step is what produces the black boxes you see from other converters — browsers composite transparency onto black by default when they encode a JPEG. If you need the transparency to survive, PDF is the wrong container; keep the PNG.
Does converting PNG to PDF lose quality?
Yes, once, and more than you might expect. PNG is lossless, but the PDF page holds a JPEG — the format PDF has embedded natively since the 1990s — so the image is compressed on the way in. JPEG was designed for photographs and handles the sharp edges in screenshots, diagrams, and text badly, producing faint halos around dark lines. Raise the quality slider above its 92% default whenever the PNG contains text or line art. The JPEG is then written into the PDF byte for byte, so there is no second round of loss.
Will the text in my screenshot be selectable or searchable in the PDF?
No. A PNG is a grid of pixels, and the PDF wraps that grid in a page — the words in a screenshot stay a picture of words. Nothing here reads them, because turning pixels back into characters is optical character recognition, a different tool entirely. If you need selectable text, run the PDF through an OCR pass afterwards; Adobe Acrobat, macOS Preview, and Google Drive can all do it. For emailing a screenshot or attaching a receipt, a picture of the text is what everyone expects anyway.
What page size do I get, and can I change it?
Every page is US Letter — 8.5 by 11 inches — turned to portrait or landscape to match the image, with the picture centred inside a half-inch margin. There is no size control. The margin exists because most printers cannot put ink on the outer few millimetres of a sheet. Printing the result on A4 works fine: printer drivers scale a Letter page to fit, and the half-inch margin absorbs the difference.
Why is the PDF a different size than the PNG?
It depends entirely on what the PNG holds. A photograph saved as PNG is stored uncompressed in any meaningful sense, so the PDF is usually far smaller — often by ten times. A screenshot or a logo is the opposite case: PNG compresses flat areas of identical colour extremely well, better than JPEG can, so the PDF may come out larger than the file it came from. The PDF structure itself adds under a kilobyte around the image, so what you are comparing is really PNG compression against JPEG compression.
Are my images uploaded to a server?
No. The PNG is decoded and the PDF is assembled by JavaScript running on your own machine, and nothing is ever sent anywhere — you can watch the network tab, or convert with your Wi-Fi off. That matters for this conversion in particular, because people turn PNGs into PDFs to file expense claims, submit signed forms, and attach screenshots of bank statements and medical records.
Going the other way — you have a PDF and need images out of it — is covered by PDF to PNG and PDF to JPG. Starting from iPhone photos instead? HEIC to PDF skips the intermediate step.