Last updated on
Jan 16, 2026
Lock PDF and Add Watermark to PDF for Laptop For 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.
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:
filling our immigration docs that were not savable and this app totally helped me to save them and get back to the docs when I have more info. Awesome. One recommendation: I would like to be able to save to a specific file in my computer rather than have to move from the download file :-)
2017-07-23
Still getting used the program but like it a lot!
I love it -- it helped me fill in some VA medical forms and made them look very professional, plus I could go back and edit as needed. It also allows me to save, print, and email. There are many other features too!
2020-04-08
very happy so far
very happy so far, awesome program for what I'm doing, fairly easy to navigate thus far, the real test will come in a few months when I'm using it a bit more to its potential.
2019-03-08
Payroll Manager needs whatever help she can get
it saves me time! I love it!
I can download any PDF and make it fillable!
it makes my job so much easier!
it makes W2-C's so easy!
it is sometimes confusing when saving a PDF.
2019-05-16
Took me a while to figure out how to…
Took me a while to figure out how to delete an entire page. My one suggestion would be to leave the previously used tool activated. I get tired of having to click on "eraser" when I'm trying to erase multiple blotches on a scanned article.
2022-02-05
I like that I can fill in and even sign document through pdf filler. It is very convenient and saves me a lot of time and headaches. It also allows me to have a more professional look on my documents which has gotten me a reputation for being professional.
2020-08-16
Lock PDF and Add Watermark to PDF for Laptop
Protect your confidential documents and maintain your brand’s identity with our Lock PDF and Add Watermark feature for laptops. Your files deserve security and a professional touch.
Key Features
Secure password protection for sensitive PDFs
Customizable watermark options for branding
User-friendly interface for quick processing
Compatible with various file formats and sizes
Batch processing for multiple files at once
Potential Use Cases and Benefits
Ideal for businesses that need to protect proprietary information
Perfect for freelancers looking to secure their creative work
Useful for educators sharing sensitive teaching materials
Great for photographers protecting their images from unauthorized use
By using this feature, you can easily solve the problem of unauthorized access and copyright infringement. With password protection, only authorized users can view your documents, while a watermark reinforces your brand presence. This way, you can share your work confidently, knowing that you have taken steps to protect it.
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
Can you unsecure a secured PDF file?
Choose Tools > Protect > Encrypt > Remove Security. Remove Security: The options vary depending on the type of password security attached to the document. If the document has a Document Open password, click OK to remove it from the document.
How do I add a watermark to a secured PDF?
Step 1: Run PDF Watermark Tool and add PDF files to watermark.
Step 2: Enter text to insert as watermark.
Step 3: Select a new location to save the PDF file.
Step 4: Click on add watermark to PDF file.
How do I add a watermark to a PDF for free?
Step 1: Select your PDF document.
Step 2: Add Text Watermark. Click the Add Text button at the top of the PDF page.
Step 3: Change text size, rotation and location on page.
Step 4: Change text color, transparency and font family.
How do I insert a lock in a PDF?
Download the tool and select Merge option from the menu.
Click on Add Files or Add Folder button to add PDF files.
Choose the required option for merging the documents.
Select any option i.e. Create New PDF or Merge into Existing PDF.
How to Lock PDF and Add Watermark to PDF for Laptop - video instructions
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