PNG to PDF converter: free, fast and secure
This free PNG to PDF converter turns your PNG images into PDF files in seconds, right in your browser. A PDF is easy to email, print and upload to college, bank and government portals, and you can combine several images into one document.
Unlike most converters, ConvertKaro never uploads your images. The conversion happens on your own device, so it is quicker, there are no file limits, and your photos stay private.
How to convert PNG to PDF in 3 steps
- Add your PNG files. Tap “Select files” or drag and drop one or more .png images into the box above. You can also paste a screenshot with Ctrl+V.
- Adjust the options. Choose the page size and whether to combine all images into a single PDF.
- Download your PDF. Conversion starts instantly. Download each PDF file, or all of them at once as a ZIP.
Why use ConvertKaro PNG to PDF? Free, fast and secure
There are many PNG to PDF websites, but most of them upload your files, add watermarks or ask you to pay. Here is why this one is better.
100% Free
PNG to PDF on ConvertKaro costs nothing. There is no trial, no premium plan and no hidden limit, so you can use it as often as you like.
Fast results
Because nothing travels to a server, results appear almost instantly. Large files are limited only by the speed of your own phone or computer.
Secure and private
Nothing is uploaded. Sensitive files like Aadhaar, PAN, salary slips or contracts stay on your own phone or laptop the whole time.
No signup, no watermark
No account, no email and no watermark on your result. Open the page and start.
Works on every device
Designed for mobile first, so it works just as well on your phone as on a desktop computer.
Quality you control
A simple quality slider lets you choose between the smallest file and the best picture, with a sensible default already set.
ConvertKaro vs other online converters
| ConvertKaro | Typical online tool | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your files | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
PNG vs PDF: what is the difference?
Both formats store images, but they are built for different jobs. Here is a quick comparison.
| PNG | ||
|---|---|---|
| Full name | Portable Network Graphics | Portable Document Format |
| Type | Raster, lossless | Document |
| Compression | Lossless | Depends on content |
| Transparency | Yes | No |
| Animation | No | No |
| File size | Large for photos, small for graphics | Small to medium |
| Support | Everywhere | Everywhere |
| Best for | Logos, screenshots, graphics with text, transparent images | Sharing, printing, submitting documents and forms |
What is PNG?
PNG is a lossless image format, so it keeps every pixel exactly as it is. It supports full transparency, which makes it the standard choice for logos, icons, screenshots and graphics with sharp text. Because nothing is thrown away, photos saved as PNG are usually much larger than the same photo as JPG or WEBP. PNG works in every browser, design tool and operating system.
What is PDF?
PDF is the universal document format. A PDF looks the same on every phone, computer and printer, which is why banks, colleges, government offices and employers ask for documents as PDF. Putting images in a PDF also lets you combine many photos, such as scanned pages or ID cards, into a single file that is easy to email or upload.
When should you convert PNG to PDF?
- Submitting scanned documents and certificates
- Combining photos of pages into one file
- Emailing receipts, bills and ID cards
- Printing images on standard A4 paper
Tips for the best PDF results
- Scanned pages look best on A4 with a small margin. Use Images to PDF if you want to reorder pages first.
- If your image has a transparent background, pick a background colour that matches where the image will be used.
- You can convert many PNG files at once. They are processed one after another and can be downloaded together as a ZIP.
- Keep your original PNG files until you have checked the converted PDF images.
How PNG to PDF keeps your photos and images private
Most online converters upload your file to their server, process it there and send it back. That costs time, uses your data pack and means a copy of your file sits on someone else’s computer. PNG to PDF works differently: the page loads the tool into your browser, and your photos and images are processed by your own phone or computer. The file never travels over the internet, so it cannot be leaked, stored or misused.
Using PNG to PDF on your phone
PNG to PDF is designed for small screens. Buttons are large, options are simple, and downloads save directly to your phone storage. On iPhone, downloaded files appear in the Files app under Downloads; on Android they go to the Downloads folder.
Who uses PNG to PDF?
Here are some of the people who find this tool most useful:
- Students uploading photos and signatures to exam and admission forms
- Online sellers preparing product photos for Instagram, Meesho, Amazon and Shopify
- Office staff handling ID cards, scans and screenshots
- Bloggers and web designers who need fast-loading images
- Anyone sharing pictures on WhatsApp, email or social media
Supported input: JPG, JPEG, PNG, WEBP, HEIC/HEIF (iPhone), AVIF, GIF, BMP, TIFF and SVG.
Frequently asked questions
Will converting PNG to PDF reduce quality?
PDF uses lossy compression, so a tiny amount of detail is removed. With the quality slider at 90% (our default) the difference is practically invisible, and you can raise it to 100% if you need maximum quality.
Does PDF keep transparency from PNG?
PDF does not support transparency, so transparent areas are filled with a background colour. White is the default, and you can pick any colour before converting.
Can I convert multiple PNG files to PDF at once?
Yes. Select or drop as many PNG images as you like. Each one is converted separately, and you can download them all together as a ZIP file, or combine them into one PDF.
How do I combine several PNG images into one PDF?
Add all the images, keep “Combine all images into one PDF” ticked, and press Download PDF. Each image becomes one page, in the order you added them.
Is PNG to PDF really free?
Yes. PNG to PDF on ConvertKaro is 100% free with no limits, no signup and no watermark. There is no paid version.
Is it safe to use PNG to PDF online?
It is one of the safest ways to do it, because nothing is uploaded. All processing happens locally on your device, and the files disappear when you close the page.
Does PNG to PDF work on mobile?
Yes. It works in Chrome and Safari on Android phones and iPhones, as well as on tablets and computers. No app is needed.
Is there a file size limit in PNG to PDF?
No upload means no server limit. The only limit is your device’s memory, which comfortably handles everyday files and even large batches.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Your downloaded file is exactly your result.
Does PNG to PDF work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.