Your browser is more powerful than you think: Lock PDF in Mozilla Firefox Gratis

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

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
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal

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:
Great, I own several businesses and am Senior Vice President at Colliers International (13,000 employees). I would like to speak with a business specialist next week to explore opportunities.
Neil G
2017-02-22
Using it to send IRS forms, very flexible options. Would like to enlarge the font size for printing some forms. If I use it more in future I will be interested in the webinar, but no need right now.
J Beckman
2018-02-14
GREAT product! Nothing negative! I draw up a lot of contracts for my job and this website makes it much easier. This is very easy to use, the interface is very clean. I wish there was an app to support this product. A lot of times I am on the go and I need to fill out PDFs. It would be nice to have an app.
Mari M.
2019-05-16
Great tool for PDF mistakes Good experience, I really recommend this for people who need a PDF edit tool It' easy to use, few and useful settings that can really help fix a mistake or even save the document in a different way I couldn't find the go back tool for a minute but it's actually pretty simple and helpful
Verified Reviewer
2019-02-26
Just what we needed for our business Just what we needed for our business. We loved the fillable forms and cloud storage, really useful and support line was very helpful
Estación San Miguel
2022-11-16
Not instinctive but... Not instinctive but the simple instructions helped me figure out what I needed to do to get the results I needed. Once I got that, it was easy as pie!
Walter
2022-08-15
Does what it's supposed to do Does what it's supposed to do, not sure why it's worth so much annually but for now it gets the job done
therealdavieg
2021-05-05
Great product Great product, super easy to use, and they offer a very nice free trial. No scam here: it's very obvious what's free and what's chargeable.
Paul
2021-01-19
Fantastic i adore this. Used it for my son for distant learning for many of his projects and class work. Also now helping with work from home. Making my job easier. Not needed to scan as much.
Amanda Naschke
2020-10-26

Lock PDF in Mozilla Firefox with a professional editor

People tend to have different resources for document management for many tasks, not to mention the feature to Lock PDF in Mozilla Firefox. For example, they might utilize one program to convert files, another one for modifying, and the third one for signing. Consequently, instead of completing a simple task in 5-10 minutes, time is spent switching among tabs.

pdfFiller is a time saver for individuals and businesses on that page. Briefly, time saving equals money saving. Stop using multiple platforms and take advantage of one, fully-featured PDF editor. Choosing pdfFiller equals choosing streamlined document workflows and convenience.

What's the difference between our platform and our competitors? Take a look at the list below to learn more:

01
Additional authentication requests. Ask a recipient to attach their photo or confirm their identity with a phone number or social profile.
02
Interactive elements. Simplify the process of collecting data by inserting customizable fillable fields, checkboxes, and dropdown menus.
03
Page management. Reorder pages, add new, and rotate or delete existing ones with the Rearrange feature.
04
Additional editor. Make significant changes to documents by utilizing the Rewrite option that allows to modify a massive amount of information.
05
Extra capabilities. Access multiple professional tools for editing text and adding new objects online.
06
Digital signature. Approve documents and send them for signing without leaving the browser tab.

These and many other helpful options such as the ability to Lock PDF in Mozilla Firefox are coming with pdfFiller out of the box. Don't waste time and effort on making use of limited capabilities. Bring your document management game one step further!

Lock PDF in Mozilla Firefox

Protect your important documents with the Lock PDF feature in Mozilla Firefox. This tool ensures that your PDF files remain secure, giving you peace of mind when sharing or storing sensitive information.

Key Features

Simple locking mechanism for quick PDF protection
User-friendly interface for easy access and management
Supports multiple PDF file formats
No additional software required, fully integrated with Firefox
Customizable password settings for enhanced security

Potential Use Cases and Benefits

Share confidential documents without fear of unauthorized access
Store personal information securely on shared devices
Protect business proposals and contracts during client negotiations
Prevent edits or alterations to important documents
Maintain integrity of academic papers when sharing with peers

The Lock PDF feature solves your security concerns by providing a straightforward solution to protect your documents. By locking your PDFs, you ensure that only those with the correct password can view or edit the files. This way, you control access to your sensitive information, enhancing your trust in digital communications.

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!

Video instructions on how to Lock PDF in Mozilla Firefox

#1 usability according to G2

Try the PDF solution that respects your time.
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal