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Jan 16, 2026
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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.
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What our customers say about pdfFiller
See for yourself by reading reviews on the most popular resources:
Too easy to get into FONT setup and not get out and return to font specified in document. I only wanted to get the lowest priced version, not discontinue.
2018-02-17
Easy to use, the functions are very intuitive
Easy to complete documents online and share electronically instantly
Pdf filler is very easy to set up and use. The monthly fee is at a low cost. Using this service makes completing and sharing electronic documents simple and efficient.
It is not free but is a very good value. You can try it for free to see how the program works but if you chose to use it, you will pay a small fee before you can print or send a completed document. Some pdf files are not compatible or are difficult to get the text exactly where I want it.
2017-11-24
It is easy, so relax and just do what you need to do.
I am so very, very pleased with how easy the program is to use. I tried others for this emergency situation and was frustrated out of my mind with the complicated programs. This one is easy, easy and very effective.
2023-10-15
Form-Filler Heaven
1. You have the forms I need; 2. the platform is user friendly, in general; 3. completion of forms is easy to navigate, specifically; 4. the ability to save in multiple formats; 5. the ease and ability to send completed forms is great; 6. The absolutely essential ability to easily sign documents in script via the 'sign' feature; 7. Overall, a useful, convenient app, that's nicely done. Thanks.
2023-03-02
this is by far the most user-friendly website I've experienced in this field. I wish I'd known about it sooner. I wasted a lot of time until I found y'all. Very thankful I'm here now.
2022-01-12
I needed to print out the forms for a…
I needed to print out the forms for a passport. PDFiller was where I was sent to do this. Perfect! I am an 83 year old senior and using a filler is not going to be a part of my life. I need to cancel my 30 day free trial. Please help me to do this. It appears that you have a very successful business, with good reason. Thank you for your service and helping me in canceling my account.Constance Heidt
2021-08-05
Lock Large PDF Files for Secure Document Management
Managing large PDF files often raises concerns about security and accessibility. Our 'Lock Large PDF Files' feature addresses these issues directly. It allows you to protect your important documents while ensuring that you and your team can access them when needed. This tool offers a simple way to keep your sensitive information safe from unauthorized access.
Key Features of Lock Large PDF Files
Secure password protection for sensitive documents
Control access by setting permissions for viewing and editing
Easy to use interface for locking and unlocking files
Batch processing for locking multiple files at once
Full integration with existing document management systems
Potential Use Cases and Benefits
Protect client contracts and agreements from unauthorized access
Safeguard confidential business reports during internal reviews
Ensure secure sharing of large PDFs in collaboration projects
Maintain compliance with data protection regulations
Increase trust with clients and partners by demonstrating document security
In summary, locking large PDF files not only keeps your documents safe but also enhances your workflow efficiency. With this feature, you solve the problem of data breaches and unauthorized access. You can focus on what matters most: managing your content and collaborating with confidence.
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 certain fields in PDF?
1. With the form fields added to the PDF, right-click on the Signature field you are wanting to edit and choose Properties. Then from the Signed tab, choose to “Mark as read-only” and select the fields you want to lock after signing. Finally, Close.
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