Convert PNG to PDF and Password Protect PDF for Desktop For Free

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Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
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Edit, manage, and save documents in your preferred format

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Convert documents with ease

Convert text documents (.docx), spreadsheets (.xlsx), images (.jpeg), and presentations (.pptx) into editable PDFs (.pdf) and vice versa.
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Start with any popular format

You can upload documents in PDF, DOC/DOCX, RTF, JPEG, PNG, and TXT formats and start editing them immediately or convert them to other formats.
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Store converted documents anywhere

Select the necessary format and download your file to your device or export it to your cloud storage. pdfFiller supports Google Drive, Box, Dropbox, and OneDrive.
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Convert documents in batches

Bundle multiple documents into a single package and convert them all in one go—no need to process files individually.
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Preview and manage pages

Review the documents you are about to convert and exclude the pages you don’t need. This way, you can compress your files without losing quality.
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Protect converted documents

Safeguard your sensitive information while converting documents. Set up a password and lock your document to prevent unauthorized access.

How to quickly convert and compress your PDF?

Upload your document

Upload a document from your device, cloud storage, email, or URL.
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Use the converter tool

Select your document and click Convert .
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Select format and destination

Decide on the file type and where you want to save the converted document—on your device or in your cloud storage.
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Manage pages and additional settings

Once everything is set, you can access advanced settings to compress a document by excluding unnecessary pages, set passwords, and select other options.
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Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
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Customer trust by the numbers

64M+
users worldwide
4.6/5
average user rating
4M
PDFs edited per month
9 min
average to create and edit a PDF
Join 64+ million people using paperless workflows to drive productivity and cut costs

Why choose our PDF solution?

Cloud-native PDF editor

Access powerful PDF tools, as well as your documents and templates, from anywhere. No installation needed.

Top-rated for ease of use

Create, edit, and fill out PDF documents faster with an intuitive UI that only takes minutes to master.

Industry-leading customer service

Enjoy peace of mind with an award-winning customer support team always within reach.

What our customers say about pdfFiller

See for yourself by reading reviews on the most popular resources:
I am very new to PDFfiller, but so far, I can see it saving me a great deal of time and expense. So excited to have learned about this awesome option.
Susie D
2017-02-09
UN F'n Believable...this should be locked down and held a secret with me being your last member..It has given me wings to unlimited potential...thanks
gerry
2017-06-15
I wish it wasn't so expensive...I'm still on the free trial right now but this app is great. Maybe offer like a college student pricing? I know us kids in college cant pay $40 a month for it
Shawn S
2019-02-18
What do you like best?
As a beginner, I was surprised not only with the fact that PDFfiller was so much easier to learn and use than the Adobe Suite but also at the range of capabilities on offer! From my first use of this online program I found new pleasure in dealing with .pdf files. I now use the program Every Single Day to create, manipulate or convert files that used to sit waiting, sometimes for days at a time, to be done by the one or two people with access to more expensive and less user friendly programs. Now I have a new "can-do" attitude to the workings of .pdf files. I can't recommend this online tool enough and it's so affordable, you can buy a license to use at home. Great product, lots of advantages. You will not look back, you will not regret this purchase.
What do you dislike?
The user Interface could do with being a little less busy. A streamlined interface and a compact "how to..." would take a 9/10 to a 10. It just needs some tweaking and it's perfect!
Recommendations to others considering the product:
In my opinion it is definitely worth spending the small amount to upgrade to the paid version!
What problems are you solving with the product? What benefits have you realized?
Administration issues generally...adding text, file conversion and commenting on documents...are all problems that I had to either pay to have done elsewhere or ask for an expensive subscription that was never in my budget and wouldn't be approved if I had asked.
Samantha Miller (Venezia)
2019-01-28
What do you like best?
Easy to use and very flexible. Upload and go. Very user friendly.
What do you dislike?
Haven't noticed any downside. Have been even able to access from my smart phone as well.
Recommendations to others considering the product:
Offer tutorials on instructions and examples of usage of the features. Currently going thru trial and error which so far has worked well
What problems are you solving with the product? What benefits have you realized?
Uploading and Filling out documents and signing them then forwarding to whomever...with ease.
User in Real Estate
2019-05-28
I had some slight issues on my 1st… I had some slight issues on my 1st attempt as there were fields in different locations than a previous edition of this form, but easily was able to correct the overwriting of several fields. Worked beautifully on several previous (new) documents.
Eugene Engebretson
2020-02-19
Great Customer Service We thought this was a bit scammy when we were charged for a plan no one recalled signing up for but once we found the email address associated with the account they cancelled the subscription and refunded the charge, no questions asked. Very pleased!
Laura
2023-03-27
Great service Great service, easy interface. Honestly just great all around. Didn't have trouble cancelling subscription and made the edits I needed to in a short period of time with ease.
customer
2021-09-11
It's kind of quirky, because I[m not familiar with pdfFiller and it just pops up all of a sudden out of nowhere, so I don't know where to begin.
Terri M
2025-03-25

Convert PNG to PDF and Password Protect PDF for Desktop

Transform your PNG images into secure PDF documents with ease using our Convert PNG to PDF and Password Protect PDF feature for Desktop. This tool empowers you to maintain the quality of your images while ensuring their safety through password protection.

Key Features

Convert PNG files to high-quality PDF format
Add password protection to your PDF documents
User-friendly interface for straightforward navigation
Batch processing to save time
Supports multiple file formats for versatile use

Potential Use Cases and Benefits

Securely share sensitive images in PDF format
Create professional documents for business presentations
Organize and store images in a compact PDF format
Protect personal images when sharing with friends or family
Easily convert and safeguard PDF portfolios for projects

This feature solves your problem of file security and image quality. You can convert your PNG images to PDFs effortlessly, while also protecting them with a password. No more worries about unauthorized access; your documents remain confidential and professional. Enjoy peace of mind knowing that your images are both accessible and secure.

Get documents done
from anywhere

Create, edit, and share PDFs even on the go. The pdfFiller app equips you with every tool you need to manage documents on your mobile device. Try it now on iOS or Android!

For pdfFiller’s FAQs

Below is a list of the most common customer questions. If you can’t find an answer to your question, please don’t hesitate to reach out to us.
What if I have more questions?
Contact Support
Open the PDF and choose Tools > Protect > Encrypt > Encrypt with Password. If you receive a prompt, click Yes to change the security. Select Require a Password to Open the Document, then type the password in the corresponding field.

How to Convert PNG to PDF and Password Protect PDF for Desktop - video instructions

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