Convert PNG to PDF and Lock PDF for iOS 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

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

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.

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.

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

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.

Protect converted documents
Safeguard your sensitive information while converting documents. Set up a password and lock your document to prevent unauthorized access.
Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
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:
In my opinion this application is very powerful, however not so intuitive, and I had to spend an inordinate amount of time in chat with technical support personnel. I would be happy to explain further.
2016-12-29
App doesnt work the same as using it on a computer. On the computer is easy and simple. Ive tried the app and seems to cant work it like on the computer such as tap on it erase or add , high light , or erase. Im using apple iphone Thank you
2019-04-26
A great replacement for Photoshop Adobe Acrobat Pro!
I love this tool - I can now replace Photoshop with an affordable option for creating fillable PDFs!
2020-01-23
PDFfiller is a GREAT program with INCREDIBLE customer service!
PDFfiller is a GREAT program! It is very easy to use. It helped me tremendously when I had a project and needed to fill out literally hundreds of documents online. The program worked very well, was incredibly responsive, & even kept all of my documents for easy access as well. Most importantly, however, is that they have absolutely INCREDIBLE customer service! I used the chat feature and it was totally painless and even enjoyable. I was treated very well by the chat rep (Paul)! I am a single mother who is trying to start a small business with VERY limited funds. I meant to cancel my plan before my 30-day trial was over. Like so many other times in my hectic life, I guess I forgot! I was quite anxious about it as many companies charge high cancelation fees if you fail to cancel during the trial. There was no need to worry though. I simply logged into my account and then I saw the chat feature. I chose to use it even though I was hesitant to do so (many companies do not provide very good customer service through chat). The response time was extremely fast. I asked to cancel my membership and he replied right away that he would do that for me. Here is the best part, he then proceeded to ASK me if I would like a refund as well!! Now that is WONDERFUL CUSTOMER SERVICE!! Thanks so much, PDFfiller & Paul! I will definitely use them in the future and recommend them to my family and friends. You just do not see that level of customer care combined with great products anymore. I was quite impressed!
2019-03-17
Thank you so much for the super prompt reply!
I had somehow removed the date stamp from my digital signature and I could not figure out how to get it back on. Turns out it was a pretty simple fix (doh!). Kara responded super fast to my cry for help. She provided written instructions as well as a screenshot (very helpful!). My date stamp is back on. :)
2023-03-10
What do you like best?
I like how easy it is to navigate the site.
What do you dislike?
I dislike how sometimes my documents don't get sent out, I have to resend a couple of times before they are received.
What problems is the product solving and how is that benefiting you?
It is allowing me to edit certain documents that I was once before remaking the entire document for different clients.
2022-11-12
Great customer support! I was unable to use the service for all the forms I needed, so cancelled within the free trial period. I deleted account, but was still charged. I sent a message to support team and within a few minutes, ***** refunded and made sure account was cancelled! Very impressed!
2021-05-26
What do you like best?
Ease of use and the editing tools available.
What do you dislike?
It would be great if the system would take me straight to the My Docs page at login.
What problems are you solving with the product? What benefits have you realized?
Great for needed digital signatures on contracts, etc. We also use it to edit maps we use in our business for clarity.
2021-02-12
Good for Most
All the forms I needed were not available but the forms that were are very useful and the insides on how to fill them out was a blessing.
2025-04-01
Convert PNG to PDF and Lock PDF for iOS
Transform your PNG images into secure PDF documents with ease. Our iOS feature allows you to convert images quickly while ensuring your files remain protected.
Key Features
Simple conversion from PNG to PDF
Option to lock PDFs with a password
User-friendly interface for effortless navigation
Fast processing without compromising quality
Support for multiple image formats
Compatibility with all iOS devices
Potential Use Cases and Benefits
Create professional documents for work presentations
Securely share sensitive information with friends or colleagues
Organize personal images in a manageable format
Prepare files for printing without distortion
Enhance document accessibility and readability
This feature addresses your need for both convenience and security. By converting your PNG images into PDF, you not only maintain the quality but also simplify sharing and storage. Locking the PDFs provides an added layer of security, ensuring your data remains safe from unauthorized access. Ultimately, this tool streamlines your workflow and gives you peace of mind.
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
How do I lock a document on my iPhone?
Run the file manager app on your iPhone or iPad. Tap Settings at the bottom, select Enable Password, you will then be able to set a password to protect any sensitive data on the phone.
Can you turn a PNG file into a PDF?
Go to the Image to PDF converter. Upload your image. We accept PNG, as well as GIF, TIFF, BMP, and JPG. Then click 'Create PDF Now'.
How do I lock a PDF on my iPhone?
Once the PDF file opens in Documents app, tap on the Menu button (three dots) in the top right corner to bring up menu at the lower section of your iPhone screen. Choose Set Password. Then type in the same password twice. Finally, hit the Set button to confirm and encrypt your PDF file on iPhone or iPad.
How do I save a picture as a PDF on my iPhone?
Fire up the Files app on your iPhone, browse to the location where the photos, images are saved. Long press on the image thumbnail to pop up the contextual menu and choose To create PDF from the bottom of this menu list.
How to Convert PNG to PDF and Lock PDF for iOS - video instructions
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