Encrypt PDF and Esign PDF for iPhone 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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Last updated on Dec 12, 2023

Discover the simplicity of processing PDFs online

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Upload your document in seconds
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Fill out, edit, or eSign your PDF hassle-free
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Download, export, or share your edited file instantly
Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
High Performer - Summer 2025
Regional Leader - Summer 2025
Easiest To Do Business With - Summer 2025
Best Meets Requirements- Summer 2025

Every PDF tool you need to get documents
done paper-free

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Create & edit PDFs

Generate new PDFs from scratch or transform existing documents into reusable templates. Type anywhere on a PDF, rewrite original PDF content, insert images or graphics, redact sensitive details, and highlight important information using an intuitive online editor.
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Fill out & sign PDF forms

Say goodbye to error-prone manual hassles. Complete any PDF document electronically – even while on the go. Pre-fill multiple PDFs simultaneously or extract responses from completed forms with ease.
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Organize & convert PDFs

Add, remove, or rearrange pages inside your PDFs in seconds. Create new documents by merging or splitting PDFs. Instantly convert edited files to various formats when you download or export them.
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Collect data and approvals

Transform static documents into interactive fillable forms by dragging and dropping various types of fillable fields on your PDFs. Publish these forms on websites or share them via a direct link to capture data, collect signatures, and request payments.
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Export documents with ease

Share, email, print, fax, or download edited documents in just a few clicks. Quickly export and import documents from popular cloud storage services like Google Drive, Box, and Dropbox.
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Store documents safely

Store an unlimited number of documents and templates securely in the cloud and access them from any location or device. Add an extra level of protection to documents by locking them with a password, placing them in encrypted folders, or requesting user authentication.

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:
You need t tell people that if they enter numbers with commas, the IRS filing process does not work. After lots of time and trial/error, I stumbled across that as the cause of my problems.
Ike H
2018-02-04
Had similar capability on work computer(s)> I was fine with filling out PDF files and saving them. Ths allows signatures and other features that may get me to keep it.
Pat D
2018-04-01
By far, one of the best programs out there. You guys did a great job on this. I will certainly renew every year. Well worth every penny. There hasn't been one document where i was left unhappy with the outcome. Thank you again! JG Houston, TX
jesse g
2019-03-05
I like it....I didn't appreciate the automatic payment/sign up. I would have rather been notified that my trial was ending with the OPTION to renew or not renew rather than automatically being signed up.
Anonymous Customer
2019-08-16
There should not be an option for… There should not be an option for alteration on the PDF document. For example, when I tried to type my name, I made a mistake and I back space the mistake but I ended up deleting the line on the original PDF document. A program like this should not give me the option to do that. Other than that, I felt like PDF Filer got the job done for me.
Wesler Aime
2019-11-08
Fill in the Blanks! As per the 'Pro's' above, when edited could be then be immediately sent by mail to my counter-party sitting across a meeting room table. Crucially important for editing legal documents........... Every had a pdf file or document that you can't collect text sections,OR fill in a form, or add notations or extend a document. I did, and often, and I wanted it to look professional as possible, be online, so access from off office meetings was available, and documents changeable in an instant. One that when edited could be then be immediately sent by mail to my counter-party sitting across a meeting room table. Crucially important for editing legal documents. Then I found PDFfiller, it does that and more and I would highly recommend it, a reasonable cost for an excellent product that continues to update and improve its offering. Keep up the good work! A little bit cumbersome in remembering how to download a finished document, could be just me, but clearer tags or instructions might help
Brendan D.
2019-05-17
Payment issue dealt with swiftly After both my cards being declined to register my subscription, I went onto the online support chat. Kara was super helpful and quick to deal with my issue - very professional and friendly. Kara was very generous in giving me three free days and advised within that time to try my payment again after 24 hours. Thank you Kara for taking the stress away and resolving my issue fast. Morven
Morven Finnegan
2021-09-16
I was completely pleased... I was completely pleased with the speed at which Sam was able to help me. He had a complete understanding of ny request and were very professional.
Lurvey Beazer
2021-01-11
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.
CYearg
2025-04-01

Encrypt PDF and Esign PDF for iPhone

Encrypt PDF and Esign PDF for iPhone offers users a seamless way to secure their documents and streamline the signing process. This feature empowers you to manage sensitive information effectively, ensuring your PDFs remain confidential and legally binding.

Key Features

Secure encryption for your PDF documents
Easy electronic signing process
User-friendly interface tailored for iPhone
Compatibility with various document formats
Cloud storage integration for easy access

Potential Use Cases and Benefits

Protect personal or business documents from unauthorized access
Facilitate quick contract signing for remote work
Comply with legal standards for document security
Simplify document sharing with encryption
Enhance workflow efficiency by reducing paper usage

By using Encrypt PDF and Esign PDF for iPhone, you can rest assured that your documents remain safe and secure. This tool addresses your need for security and efficiency, allowing you to send, sign, and store your documents with confidence. Take control of your digital paperwork and enjoy peace of mind with every PDF.

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
Choose Tools > Protect > More Options > Encrypt with Password. Choose File > Protect Using Password, and then choose Advanced Password Protection from More Options.
On iOS, encrypting your device is as easy as setting a passcode. However, on its own, this encryption does little more than make it easy to remotely wipe a stolen or lost phone. To enable a stronger layer of security, iOS users have to set a passcode on their phone or tablet.
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 to Encrypt PDF and Esign PDF for iPhone - video instructions

#1 usability according to G2

Try the PDF solution that respects your time.
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
High Performer - Summer 2025
Regional Leader - Summer 2025
Easiest To Do Business With - Summer 2025
Best Meets Requirements- Summer 2025