Lock large PDF files 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.
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Laatst bijgewerkt op Aug 16, 2021

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:
I originally downloaded Adobe Flash Player thinking I could make my own PDS I was wrong it was I'm no help. Just by doing a simple internet search. I came across your website it's amazing. It does everything I needed to do and more so happy I found it! I'm a landlord and now I can send applications online and fill out leases online so convenient.
Nowland Kenyon Properties
2018-02-12
Price point too high for how infrequent I would use this program but I did like its versatile options and over all user friendly templates, just had too play around a little bit to get it figured out!
Ryan S
2020-03-18
The software is really good The software is really good, haven't tried the customer service yet.My only main issue is that it deals with the text as line by line and not as a block of text, and sometimes it when editing the text it makes it smaller automatically just by clicking on it.This makes it a bit harder to edit at some times but will see if it affects me much or if I can find a way around it. The rest is really well organized and efficient.
George A
2020-02-07
Besides being a great product Support is Outstanding Besides being a great product, I would like to express how good the support is.I worked with Sam for over an hour, He went way above and beyond helping me with my Zapier Integration. Most companies would have just said that is "out of scope" Or "not my problem" Not these guys, they logged into my computer and dove deep into it and fixed my problem. Also keep in mind, I am only on a basic plan and they treated me like I was spending $1000's of dollars with them.
Kevin McGrath
2020-02-04
You get what you expect What I expected from this when I signed up. It is easy to use when editing pdf files, I need to submit for my school requirements. So far, I am satisfied on what I am experiencing and giving it a 5 star.
Lyle
2023-05-01
Works great for doc conversion that is… Works great for doc conversion that is QUICK & easy. Takes me no time to get it done & team loves the final products.
Jeri Shields
2022-07-01
What do you like best? It's very easy to edit and sign documents What do you dislike? It's a little slow to load especially with the Dropbox feature Recommendations to others considering the product: Try it, its well worth it What problems are you solving with the product? What benefits have you realized? I needed something to easily edit PDF's. It's easy and more versatile than many other pdf editing apps
User in Non-Profit Organization Management
2020-08-26
if the connection of the internet service provider is weak the form you type is loading until the connection comeback and repeat again in where you are last typing.
Roy T
2020-08-02
I had questions about the program and… I had questions about the program and billing, they answered them right away and did anything for my needs!
Hunter
2020-06-25

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.

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
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.

#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