Lock large PDF files Gratuit

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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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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:
PDF FILLER SAVED MY LIFE WHEN THERE WAS NO OTHER WAY TO GET THE JOB DONE. NOT ONLY GOT THE FORMS I NEEDED FROM EVERY YEAR...FILLED THEN OUT...SIGNED THEM AND FAXED THEM ALL FROM PDF FILLER. SO THANKFUL!!!
Anonymous Customer
2015-09-23
I am finding it helpful indeed. I haven't utilized all of the options yet. So far I like it. The mobile app is far more difficult to use than the website. Doesn't quite sync with the different cloud websites for transfers into the app.
Lish D
2019-07-24
What do you like best?
PDFiller is ultra-convenient and super-easy to use. It's in the cloud, so it's easy to access. And it has a vast array of features. Storage is a cinch, whether on your hard drive or in the cloud.
What do you dislike?
I can't think of much that I don't like about the program. There might be a more direct or seamless way to save documents to Google Drive, in terms of getting them straight into a particular folder instead of just onto the Drive, but that's a minor issue.
Recommendations to others considering the product:
Try it. You'll like it.
What problems are you solving with the product? What benefits have you realized?
PDFiller is a lifesaver when I'm editing contracts and related forms. The clarity of the input and the ability to maneuver the text around the document is a huge plus. Line-outs and erasures are a breeze, making for "cleaner," more legible documents.
Stephen H. Collins
2019-05-21
What do you like best?
PDFfiller is easy to use and has widely varied functionality. From the editing of documents to the administrative/management aspects of the program, it is quick and simple
What do you dislike?
Some elements of the interface gets a bit busy. It ends up leaving me with a somewhat small visual operating space. It is worth mentioning, though, that this has improved a bit in the last six months or so.
What problems are you solving with the product? What benefits have you realized?
I'm using the templates to edit and send out letters, which I like. I'm also sometimes using the direct email function.
User in Real Estate
2020-02-03
The only thing I really had a problem… The only thing I really had a problem with is that I completed what I thought was a "free" form and then had to sign up for a free trial. The actual program is very useful and helpful and relatively easy to navigate through.
Suzanne Hu
2019-07-03
An easy and effective tool for PDF files in daily office work. It's an amazing alternative of Adobe's pro version and I don't need any file to install on my system. I can do my work through this application on my web browser itself. It is very easy to use. It helps to add notes to your PDF files easily. It also has the feature of importing files from a URL. After editing your pdf file you can directly send it to your email id. Its inefficiency of uploading multiple files in one operation. Sometimes it become slow when uploading slightly large file irrespective of internet speed.
Kapil V.
2018-11-27
My experience with PdfFiller was great My experience with PdfFiller was great. I use PdfFiller as a cloud storage for backup files, in addition I can multitask by retrieving signed documents and save them in my signed doc. file for later.
Adrian R Smith
2024-03-07
What do you like best? I like the ability to electronically sign documents. What do you dislike? I wish I was able to edit the text in documents without the formatting getting messed up because it only allows for the addition of new text boxes or adding to existing ones which causes the formatting issues. What problems is the product solving and how is that benefiting you? It's solving the issue of having to print out and fax documents which can be time consuming. It has really benefited my company to be able to sign and send documents electronically making for a smoother more efficient experience.
Verified User in Logistics and Supply Chain
2022-11-03
Paul was able Paul was able, after me explaining my issue, to completely solve my problem! He was brilliant! Anthony and I had a conversation as well but I needed to cut the call short, therefore, no feedback form was sent for him. He too was extremely helpful!
Cynthia OConnor
2022-05-13

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