Lock PDF in preview For Free

Drop document here to upload
Select from device
Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
Note: Integration described on this webpage may temporarily not be available.
0
Forms filled
0
Forms signed
0
Forms sent
Last updated on Sep 21, 2025

Discover the simplicity of processing PDFs online

Card illustration
Upload your document in seconds
Card illustration
Fill out, edit, or eSign your PDF hassle-free
Card illustration
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

Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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:
At first, not good....too expensive for a one time use. Sarah's response was great and her instructions were, too. She convinced me to use the program gratis to see how it works. It was fantastic.
Donnie S
2018-05-11
What do you like best?
It helps me to create templates for reuse
What do you dislike?
Fonts are hard to match when inserting wording
Recommendations to others considering the product:
Much easier for documents than in design
What problems are you solving with the product? What benefits have you realized?
Recreating documents/leases that are time consuming if I have to retype them.
Becky Jones
2019-05-21
Poor internet connection affects how… Poor internet connection affects how fast one can work. I commend the fact that the program saves all changes in a timely fashion.
r akamanya
2020-03-25
Amazing software Amazing software, Unreal flexibility for the price. Only thing I would change is possibly the phone numbers as we are not all in US. All in all, saves hours a week.
Graeme Paterson
2020-03-11
creat pdf documents easy I hd some problems to create pdf document,s now it's much more easy. I think it's a greta tool for professionals no matter which sector Difficult to understand some of the features, but I made it finally.
Pablo R.
2022-07-07
VERY EASY TO USE PLUS ONE SUGGESTION VERY EASY TO USE. THE ONLY THING I THINK NEEDS TO CHANGE IS THAT WHEN I SAVE THE DOCUMENT, INSTEAD OF SAYING IRS FORM 940 (OR SOMETHING CLOSE TO THAT) I THINK THE YEAR OF THE FORM THAT WAS WORKED ON. FOR EXAMPLE: IRS FORM 940 2019
Virginia Cammarano
2022-06-16
Super simple to use (I'm not that tech… Super simple to use (I'm not that tech savvy) & good options for subscription/sign-up, including free trial! Was able to easily sign & date documents on my phone. REALLY GREAT SERVICE!!
Elizabeth Leodler
2022-03-17
This here website it's preformed is Excelente great full fill all where you site out to do ever with pdf filler you go to go I am learning a lot of new skills along the way.
Patyrick J
2021-03-22
Exactly what I was looking for. It's easy and simple to edit your files. Going to test this beauty thoughout the next day to see whats possible and if it cna improve my operating principles.
Anonymous Customer
2020-10-21

Lock PDF in Preview Feature

The Lock PDF in Preview feature provides a seamless way to secure your important documents. With this tool, you can easily prevent unauthorized access and ensure your sensitive information remains confidential.

Key Features

Simple interface for quick access and usage
Password protection to secure your files
Option to set permissions for editing and printing
Compatibility with various devices and file formats
Efficient processing to save time

Potential Use Cases and Benefits

Secure personal documents like tax records and financial statements
Protect business contracts and client information
Share sensitive files while controlling access levels
Safeguard creative works like designs and proposals
Maintain confidentiality for educational materials

By using the Lock PDF in Preview feature, you can address the common problem of document security. It helps you keep your information safe from prying eyes. You will feel more at ease knowing that your important files are protected and accessible only to authorized users.

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
In the Preview app on your Mac, open the PDF that you want to password-protect. Choose File > Export, then select Encrypt. You can also enter a new name for the PDF if you want to create a pass worded copy and keep the original PDF unencrypted. Type a password, then retype it to verify the password. Click Save.

#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