Last updated on
Jan 16, 2026
Lock PDF in preview For Free
Drop document here to upload
Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
0
Forms filled
0
Forms signed
0
Forms sent
Try these PDF tools
Edit PDF
Quickly edit and annotate PDFs online.
Start now
Sign
eSign documents from anywhere.
Start now
Request signatures
Send a document for eSignature.
Start now
Share
Instantly send PDFs for review and editing.
Start now
Merge
Combine multiple PDFs into one.
Start now
Rearrange
Rearrange pages in a PDF document.
Start now
Compress
Compress PDFs to reduce their size.
Start now
Convert
Convert PDFs into Word, Excel, JPG, or PPT files and vice versa.
Start now
Discover the simplicity of processing PDFs online
Upload your document in seconds
Fill out, edit, or eSign your PDF hassle-free
Download, export, or share your edited file instantly
Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
Every PDF tool you need to get documents done paper-free
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.
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.
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.
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.
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.
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:
PDF helped me achieve what I had to…
PDF helped me achieve what I had to when signing documents and when I asked for the subscription to be cancelled they obliged which I was thankful for
2020-03-19
Great PDF
Very easy to use! Updating documents quickly is really helpful and saves me time in my practice. It's great to have the app in case I am not in my office when a change is needed.
There are a few glitches. For example, in order to save a document you have to remember to duplicate it. The emailing feature can be glitchy at times.
2018-12-31
Very easy to use
I like that it notifies me when someone has completed the document. I also like how you can customize the fields between numbers and dates which makes it fool proof. Support is very quick to respond and helpful.
I have been trying to set up a document to copy certain fields throughout so they do have to enter their "name" every time, but I have had trouble trying to figure it out.
2017-11-27
great editing software
great editing software. easy to use and loved how easy it was to start to use because i never had to go through any major learning curve.
2024-10-03
It's very easy to use. Also the customer service is exceptional. Very responsive to My questions. When I decided I didn't need it anymore, they processed my cancellation quickly and easily.
2022-03-26
This app is not flooded with ads and/or private tools as far as I could check
I just needed to merge stuff and this website (didn't know it, it just popped after a simple search) showed me tutorials for all the tools they have to make my documents complete and personalized as needed. I am here because we live in an era where an app that does not flood you with advertisement and charge your for each tool available calling some of them 'premium' or 'plus' or 'pro max' is RARE. I want to be explicitly thankful about this. Useful for the purpose of being useful. Didn't believe stuff like this existed anymore.
2025-04-11
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.
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 you lock a PDF on a Mac?
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.