Convert PNG to PDF Portable Network Graphics ↔ Portable Document Format Free Online Secure
Drop your images, put them in the order you want, and download one PDF.
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Where PDF comes from
PDF began as a question John Warnock put to Adobe in 1991: why can a document not look the same on every machine that opens it? The answer, released in 1993, was a format that carries its own fonts, its own page geometry and its own description of every mark on the page, so that nothing has to be re-laid-out at the other end. For fifteen years it belonged to Adobe; since 2008 it has been an open ISO standard, which is why government forms, court filings and archives can insist on it without tying anyone to one company's software. That is the whole reason to convert into PDF: it is the point at which a document stops changing.
Where you meet it
Anything that leaves your hands and must arrive looking the same: a contract to be signed, an invoice, a CV, a thesis, a tender, a form a government department will only accept in one layout. It is also what a print shop asks for, because a PDF carries the fonts and the exact page size rather than hoping the printer has them. Images become PDFs for the same reason — to be sent as a document rather than as a picture somebody might crop or resize.
Questions people ask
Will the layout change when I convert?
That is precisely what PDF is for: once made, the layout is fixed and will look the same wherever it is opened. The risk is in the moment of conversion itself, not afterwards. If the original document uses a font your machine does not have, the conversion substitutes a similar one and lines can shift slightly — so it is worth opening the result and glancing at the last page, where any accumulated shift shows up most. After that, nothing moves again.
Can the text still be selected and searched?
If the original was a text document — a Word file, a spreadsheet, a web page — then yes: the words are carried across as words, and the PDF can be searched, copied from and read aloud by a screen reader. If the original was a photograph or a scan, the PDF contains a picture of text, which looks identical but cannot be searched. Making that searchable needs character recognition, which is a different job from conversion.
Does the file lose quality?
It depends on what the two formats can hold. Converting between formats that store the same thing — a PNG to a BMP, a WAV to a FLAC — loses nothing. Converting into a format that throws information away to save space, such as JPEG or MP3, loses a little every time, and converting back does not bring it back. Where a choice exists, this page errs towards keeping the original quality rather than making the smallest file.
Is my file uploaded anywhere?
No. The conversion happens inside your browser, on your own machine; the file never leaves it and there is no server here that could receive it. That is why a large file is limited by your own memory rather than by an upload, and why nothing you convert can appear in anybody's logs — including ours. The audio and video tools do fetch their conversion engine from this site the first time you use them, some thirty megabytes once; after that the work still happens entirely on your machine.
Why people convert PNG to PDF
PNG is the format of screenshots, diagrams, logos, charts and scanned line art. It keeps every pixel exactly as it was drawn, which makes it ideal for anything with sharp edges and flat colour. A PDF is the format of documents: pages in a fixed order that open the same way on every device. When you convert PNG to PDF, you turn a pile of loose images into a single document that is easy to attach, print, archive and share.
The reasons are ordinary. You have taken a series of screenshots to document a problem for a support team. You have drawn diagrams for a report and want them in one file. A designer sent a set of mock-ups as PNG files and you need to forward them as one document. A form accepts PDFs but not images. In every case you are going from pictures to a document, and converting PNG to PDF is the quickest way to do it.
This page converts PNG to PDF in your browser. Your images are not uploaded anywhere, which matters for screenshots that show private information, unreleased designs and internal documents. Below you will find how the conversion treats your images, what happens to transparency, and how to avoid the usual mistakes.
What the conversion keeps
The pixels, unchanged
Here is the key fact about this page: it embeds your PNG's pixels into the PDF unchanged. PNG is a lossless format, meaning nothing is discarded when it is saved, and the conversion preserves that. Each image appears in the PDF exactly as you made it, with sharp edges, flat colours and crisp text. Because nothing is re-compressed with loss, there is no quality cost to converting PNG to PDF.
Nothing is redrawn or enhanced
Nothing is redrawn, sharpened, smoothed or colour-corrected. The PDF contains your pictures, not a processed version. For screenshots and diagrams, where precision matters, that is exactly right.
Why lossless matters for screenshots
Screenshots are full of small text, thin lines and sharp boundaries between colours. These are precisely what lossy compression damages first, leaving fuzzy halos around letters. Because the pixels are embedded unchanged, text in your screenshots stays crisp and lines stay clean, even when the reader zooms in.
What happens to transparency
Transparency is flattened onto white
PNG can contain transparent areas, where the background shows through. A PDF page does not carry that kind of transparency in the same way, so any transparent part of your image is flattened onto white. A logo with a see-through background will appear on a white page. That is usually what you want, since PDF pages are white anyway.
When flattening matters
It matters if your image has transparent areas and you expected a coloured page behind it. A white logo on a transparent background, for instance, will disappear against white, because there is nothing to see it against. If that applies to you, give the image a dark background before converting, or choose a different approach.
A quick check
Open your PNG against a coloured background in an image viewer. If the picture shows through where you expected solid colour, it has transparency. If so, decide whether white is acceptable. For most documents it is. For white-on-transparent artwork, it is not.
How the pages are made
One image, one page
Each image becomes one page. Drop six PNGs and you get a six-page PDF. There is no layout with several pictures per page and no cropping. Every image gets a page of its own, which suits documentation, mock-ups and diagrams.
You choose the order and the size
You put the images in the order you want before converting, and the pages follow. You also pick the size at which each image sits on its page. Choose a standard paper size for a document you might print, or the option that suits your pictures best. The image is placed on the page, not stretched.
What a PNG is, and what a PDF adds
PNG stands for Portable Network Graphics. It stores an image as a grid of coloured dots and compresses it without discarding anything, so the picture you open is bit for bit the picture that was saved. It can also hold transparency, which is why logos and interface graphics so often come as PNG. The price is size: a detailed full-screen PNG can be several megabytes.
A PDF is a container for pages that keeps everything in a fixed order and a fixed size. When you convert PNG to PDF here, the PDF acts as a binder for your images, one image to a page, and the images themselves are not altered. What you gain is the binder: a single file, a single order, a single thing to attach to an email or upload to a form.
Why not send the PNGs as they are?
You can, and for one or two images it is often fine. But a dozen loose files invite problems: they arrive out of order, one gets lost, the recipient opens them in different programs and sees different things. A PDF scrolls like a document, prints in sequence and cannot be reshuffled by accident. For anything that has to be followed step by step, the binder is better than the loose pages.
A workflow for screenshots
Screenshots are the most common thing people turn into PDFs, and a little discipline makes the result much better. Start by capturing only what matters: most screenshot tools let you select a region, so you can leave out browser toolbars and desktop clutter. Name the files so they sort in the right order, for instance step-01, step-02 and so on. Put a zero in front of single digits so that step-10 does not sort before step-2.
Before you convert PNG to PDF, look through the screenshots for anything private. Names, email addresses, account numbers, tokens and addresses have a way of appearing in a corner you did not notice. Cover or crop them before you combine the images, because once the file is a PDF that you have sent, you cannot take it back.
Dark mode screenshots
Screenshots taken in dark mode have a dark interior but, once placed on a white PDF page, are surrounded by white margins. That is perfectly fine and often looks neat, like a framed picture. If you would rather have no white margin, choose a page size that suits the images, and check the result before sending.
Annotating first
If you want arrows, boxes or notes on your screenshots, add them before you convert PNG to PDF, using any image editor or your screenshot tool's markup feature. The annotations become part of the image and travel with it into the PDF, which is far simpler than trying to annotate afterwards.
Diagrams, logos and charts
PNG is also the natural format for diagrams exported from drawing tools, for charts exported from spreadsheets and for logos. These often have fine lines and flat colours, which the unchanged pixels preserve exactly. One thing to keep in mind is resolution: a diagram exported at low resolution will look soft on a printed page, however it is converted. If you plan to print, export the diagram at a larger size first.
For graphics that must stay sharp at any size, consider keeping them as vector drawings. If you only have a PNG of a logo or a diagram and want a scalable version, converting PNG to SVG traces the shapes, with the limits that tracing always has: it works well on simple flat-colour artwork and poorly on photographs.
Transparent logos on coloured backgrounds
If a logo has a transparent background and you want it on a coloured page, the conversion will not do that for you, because transparency is flattened onto white. Place the logo on the colour you want in an image editor, save it as a new PNG with that background, and convert that file instead.
How to convert PNG to PDF here
Add your images
Drop your PNG files onto the page, or pick them from your device. You can add several at once. They stay on your device.
Arrange and choose the size
Put the images in the order you want, pick the page size, and check that nothing is the wrong way up. If an image needs turning, rotate the PNG first.
Convert and check
Press the button and download the PDF. Scroll through it once: check the order, the orientation and that any transparent images look as you expected on white.
Tips for a clean PNG to PDF result
Crop before you convert
Screenshots often include browser frames or empty space you do not need. Crop them before converting, so each page shows only what matters. A tidy page reads faster than one with a quarter of it wasted.
Number or label if needed
If the order matters, such as steps in a procedure, number the images in their file names before adding them. Then you can sort by name and be sure the pages come out in sequence. You can also add page numbers to the finished PDF.
Mind the file size
PNG files of screenshots at high resolution can be large, and the PDF will carry them unchanged. If you need to send it by email, compress the PDF afterwards, or reduce the images first with the PNG compressor.
Questions people ask before converting
Will the quality drop?
No. The PNG's pixels are embedded unchanged, so the image appears exactly as you made it.
What happens to my transparent background?
It is flattened onto white. If your image depends on a transparent or coloured background, add that background before converting.
Can I reorder the pages?
Yes. Arrange the images before you convert, and the pages follow that order.
Are my images uploaded?
No. The conversion runs in your browser and the images never leave your device.
Can I mix PNG and JPG?
This page takes PNG files. If you have photographs in JPG, use the JPG to PDF converter, and merge the two PDFs if you want a single document.
Who converts PNG to PDF
Support teams and testers
A sequence of screenshots documenting a problem is far easier to review as one PDF than as a dozen attachments. The reader can scroll through the steps in order.
Designers and developers
Mock-ups, wireframes and diagrams are often exported as PNG. Combining them into a single PDF makes them easy to send for approval.
Students and writers
Charts, figures and scanned notes can be gathered into one document for submission, with every image kept sharp.
Common mistakes
Forgetting about transparency
White artwork on a transparent background disappears on a white page. Check before you send.
Wrong order
Check the sequence before converting, especially for step-by-step screenshots.
Oversized files
Large screenshots make heavy PDFs. Compress if the destination has a limit.
Related conversions and tools
For photographs, convert JPG to PDF does the same job. To go the other way, convert PDF to PNG turns each page back into an image. Other routes include PNG to JPG and PNG to WebP, and if you want a PNG as a scalable drawing there is PNG to SVG. Once you have the PDF, you can merge it with other PDFs.
When converting PNG to PDF is not the best route
Sometimes another route serves you better. If the recipient needs only one image, send the PNG; wrapping a single picture in a PDF adds nothing. If you need the text in your screenshots to be searchable, a PDF made from images will not give you that, because the words are part of the pictures. If you want several images laid out together on one page, build that layout in a document or design tool first, then turn the result into a PDF.
For the common cases, such as a sequence of screenshots, a set of diagrams, charts for a report or mock-ups for approval, converting PNG to PDF in the browser is quick, private and lossless. Your PNG files stay untouched, so if you need to change the order or swap an image, you can convert PNG to PDF again in moments.
Large batches
Everything runs on your own device, so very large batches depend on its memory. Twenty screenshots are no trouble. A hundred high-resolution images may be slow on an older phone. For very large sets, convert in groups, such as one chapter or one day at a time, and merge the PDFs afterwards in the right order.
Keeping the file size down
Because the pixels are embedded unchanged, the PDF is about as big as the combined PNG files. Screenshots of a 4K display can be big. If the destination has a size limit, you have two good options. Reduce the images first by lowering their resolution, then convert PNG to PDF. Or convert at full size and compress the PDF. Reducing the images first gives you the most control over how much each one shrinks.
A note on accessibility
A PDF made of pictures of text is not readable by screen-reading software, because the words are pixels rather than characters. If your audience includes people who use assistive technology, provide the information as real text as well, for example in the body of an email or in a document. The PDF is then a convenient visual copy rather than the only version.
Your images stay on your device
The conversion happens locally. Your images are read by your own browser, placed into a PDF there and handed back. Nothing is uploaded, so there is no copy on a server and no one else who could see them. For screenshots that show private data or unreleased designs, that is the safe way to do it.
A worked example
Say you took eight screenshots showing how to set up a printer, and a colleague asks for a document they can follow. You name the files step-01 to step-08, drop them here, and choose an A4 page size. You press convert and download an eight-page PDF. You scroll through: the steps are in order, the text in each screenshot is crisp, and nothing was lost. You attach one file instead of eight.
Why privacy matters for screenshots
Screenshots capture whatever is on your screen at that moment: other tabs, notifications, names in a sidebar, a half-visible email. Turning them into a PDF by uploading them to someone else's server would hand all of that over. Here the images stay in your browser while you convert PNG to PDF, and nothing is sent anywhere.
Before you close the page
Check that you downloaded the PDF, that the pages are in order and upright, and that transparency looks right on white. If all three are true, converting PNG to PDF is done.
Summary
To convert PNG to PDF here, drop your images, put them in order, choose a page size and download one PDF. The pixels are embedded unchanged and nothing is redrawn or enhanced. Transparency is flattened onto white. Each image becomes one page. Nothing leaves your device.