Lock PDF and Add Watermark to PDF for Windows Gratis

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Última actualización el Dec 12, 2023

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Upload your document in seconds
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Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
Users Most Likely To Recommend - Summer 2025
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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
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average user rating
4M
PDFs edited per month
9 min
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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 lost you.... I found you then I tried to get a refund unable to figure out your site.... I tried for months you can see it was never used, CHASE tried to reach you...long story you had popped up I never noticed the name of this when I crashed that was it... I have all of the old emails off a hard drive on a back up device... I might re sign but 30 days is not worth losing 72.00 I dont use this much most of my forms are already loaded not sure yet I have become further disabled trying to recover back then your chat did not work nothing....
Patricia E
2016-06-08
It seems to be pretty straightforward. I have trouble saving it to Word and printing it but I can just print it from this program and it turns out perfect.
Anonymous Customer
2017-06-24
I have only just started using PDFiller.com and I am very happy with the product. My only compliant is that I was forced to subscribe to it without the option of a free trail etc When I did a search on the web for a free PDF Editor, PDFiller.com was one of the websites that popped up, I edited my document (which was a theory paper that I had already spent hours on !!) and when it went to saving it I could not without paying for service... so not a free PDF editor!!! And you can not subscribe month to month, you had to pay for a full year. I know that is business but very deceiving!
Michelle C
2018-06-07
ONE OF THE BEST PDF FILLER'S IVE USED… ONE OF THE BEST PDF FILLER'S IVE USED SO FAR. SOMETIMES THE FONT LOCATION/SIZE WILL PRINT DIFFERENT THAN IT APPEARS ON THE SCREEN BUT AN ADJUSTMENT OR TWO WILL TAKE CARE OF THAT.
Maria Stites
2020-02-29
Love the ease of use. I would highly recommednd this product to any business person. Initially, I was hesistant because learning new software is always my dread. However, once I signed on it was so easy. Makes daily document updates and creations easy. I can always find an Accord form I needed with this as well. And edit of pdfs are no longer an avoidance. Sometimes there is a delay from screen to screen. But nothing to really complain about.
Nicola L.
2019-01-22
Excellent easy-to-use online file editor Super easy and practical tool. Without a doubt the best I could use. It makes my tasks much easier in my work area allowing me to edit documents quickly. PDF FILLER is a great editor. It allows me to make changes to my documents, files and easily save them on my computer making my work much easier. One of its disadvantages is that to be able to use this software it is essential to have an internet connection since it is a service that implies having a user and opening a session.
Madeleyne M.
2018-06-07
What do you like best? I enjoy PDF Filler because it is not as expensive as Adobe Pro, and it allows me to quickly edit, sign, and return any PDF document I would normally need to print out, and scan back to myself. What do you dislike? One dislike I have is the fact I need to download everything. It would be really helpful if everything would be automatically saved on something like a onedrive (cloud storage), where it would be automatically saved. This way, I can have a local folder on my computer without needing to go into the webpage and click download What problems is the product solving and how is that benefiting you? I no longer need to waste paper to download a form, and fill it out. Normally I would need to do this, then scan it back to myself. now I can upload, edit, and sign the form which saves a lot of time.
Brandon Hogg
2022-11-07
I cancelled the subscription 11/11/2021… I cancelled the subscription 11/11/2021 and pdffiller took my money via PayPal at 11/12/2021. I don't understand why. It's no honest. I don't even have an account on your site Edit: I'm very satisfying with customer service of pdffiller. They returned my money. Thank you
Aleksandra Cabon
2021-12-11
Excellent App - Does All I Need It To Do Brilliant web based pdf application that does all that I want to do at a fraction of it's adobe equivalent.
Mr Phillip Addison
2020-08-27

Lock PDF and Add Watermark to PDF for Windows

Our Lock PDF and Add Watermark to PDF for Windows feature empowers you to protect and brand your PDF documents effortlessly. This tool helps secure your sensitive information while allowing you to add a professional touch to your files.

Key Features:

Secure your PDF files with password protection
Add custom watermarks with text or images
Apply restrictions on printing or editing
User-friendly interface for easy navigation
Compatible with all PDF versions

Use Cases and Benefits:

Ideal for businesses that require document confidentiality
Useful for freelancers wanting to showcase their work with branding
Perfect for educators to protect course materials
Essential for legal professionals to secure sensitive data

This feature addresses your need for document security and branding. By using Lock PDF and Add Watermark, you ensure that your files are not easily altered or misused. Additionally, adding watermarks allows you to assert ownership over your work, which is critical in today's digital landscape.

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
On the Design tab, select Watermark. In the Insert Watermark dialog, select Text and either type your own watermark text or select one, like DRAFT, from the list. Then, customize the watermark by setting the font, layout, size, colors, and orientation. Select OK.
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.
Click “Add directories to list” icon to add all files in a folder to the list together; Click “Watermark→Create→New Text Watermark” to enter into “Add Text Watermark” interface, define name, then click “Macro” button to choose unique data for different PDF copies;
Steps to Add Watermark to PDF File Step 1: Run PDF Watermark Tool and add PDF files to the tool, click Next. Step 2: Choose a watermark type and do all the necessary settings. Step 3: Click on Preview to see the view of the PDF page before generating. Step 4: Click on Generate to add watermark to protected PDF file.

How to Lock PDF and Add Watermark to PDF for Windows - video instructions

#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