Lock and Add Watermark to PDF for free

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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:
You have to carefully choose where to type, the format functions are limited and the printing is a little awkward as you cannot alter the margins. However, it is easy to use.
Anonymous Customer
2015-05-20
Excellent application, very smart it detects data entry fields and allows to add text to PDF document. So far I'm very satisfied with this application.
Fatina A
2017-12-16
This app has been very helpful in tracking various forms and schedules in one place. I couldn't always access a particular form but generally, this was a great way to do a one-stop-shop for tax forms.
Anonymous Customer
2018-04-06
What do you like best?
No need to print at all! Completely paperless
What do you dislike?
Everything is perfect no negative comments
Recommendations to others considering the product:
Great on completing and signing PDF’s
What problems are you solving with the product? What benefits have you realized?
Complete all forms on a go !! Saves time and money on printing cartridge
User in Commercial Real Estate
2019-10-07
Nice Online Editor Firstly, thank you for this beautiful pdf editor. Lately I was in need of pdf editors and most of them were either paid or working bad, but pdffiller looks clean and easier to use than other free online pdf editors.
ABDÜLKADİR ÖZYILMAZ
2022-08-29
Using pdfFiller is seamless! Using pdfFiller has been a seamless process! Love that there is a 30-day free trial. Dashboard is easy to navigate. Also love multiple send options (including fax). Great tool to use at work and for personal tasks!
LISA MARTIN
2022-03-30
This has been a great website This has been a great website, With my wife and I moving and having to sign all these documents this has helped out so much with filling out and signing them.
William Walker
2021-07-19
There was a bit of a learning curve to getting the software's capabilities down, but once I understood how to use the forms feature and whatnot, I find I really enjoy using your software more than I even like Adobe. I think your program has better templates and features than the others I have tried. Bonus points for being lower priced than Adobe while you're at it.
Lydia C
2021-02-01
had a few problems with text had a few problems with text, once I got hang of it, it was OK, tried to add "auto-fill" for signature of doc, having troubles.
Jay Keating
2020-05-01

Simply Lock and Add Watermark to PDF and much more, using pdfFiller

In case you're tired with utilizing single-function programs in which you are only capable to complete just one manipulation at one time, we know how you feel. Hours are spent switching back and forth among several options. Try using pdfFiller to get things done quicker and speed up these processes.

pdfFiller is a certified, web-based PDF editor that works from the cloud. Simply open a web browser, sign in to your account, choose a template, and Lock and Add Watermark to PDF right away. Performed online, the process of editing files in Portable Document Format is easy and quick, smooth actually. An advanced set of features helps you to do what you need and much more. Here are the most helpful tools you may use with your documents on pdfFiller:

01
Fillable fields. Embed them to allow customers to provide their data
02
Layout management. Rotate, add, or delete new pages to achieve your objectives
03
signatures. Certify documents straight from your device
04
Watermarks. Place your logo or name on the document's pages in order to avoid plagiarism
05
Extensive export. Send a form by email or fax, transfer it to the cloud storage, or download as one of the available formats: PDF, DOCX, XLSX, PPTX, and JPG
06
Templates. Generate reusable forms and fill them out as many times as you want

pdfFiller is not only useful for Lock and Add Watermark to PDF but keeps your information secure. pdfFiller operates the service based on the US and EU data protection standards. Thanks to the two-factor authorization, you don't need to go another day with your information exposed to unauthorized third parties.

Value your time and get started with pdfFiller today for a more efficient approach to how you Lock and Add Watermark to PDF.

Lock and Add Watermark to PDF Feature

Ensure the security and integrity of your PDFs with the Lock and Add Watermark to PDF feature. This tool provides you with an efficient way to protect your documents and reinforce ownership. You can secure your content while maintaining its visibility and professionalism.

Key Features

Easily add customizable watermarks to your PDFs
Lock documents to prevent unauthorized edits or access
User-friendly interface for seamless integration
Compatible with various PDF formats
Preview changes before finalizing your document

Potential Use Cases and Benefits

Ideal for businesses needing to protect sensitive information
Useful for authors and photographers to mark their work
Great for educational institutions to secure academic materials
Perfect for legal documents that require authenticity
Supports branding by adding logos and texts as watermarks

This feature addresses your need for document security and authenticity. With the ability to lock your PDF, you eliminate the risk of unauthorized alterations. Adding a watermark also enhances your visibility and declares ownership over digital documents. You can confidently share your PDFs, knowing that your content remains protected.

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
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.
Safeguard PDF security enables you to add watermarks to PDF files simply and securely. To add a watermark to a PDF (non-removable and dynamic), right-click on PDF files in Windows File Explorer and select the option 'Make Secure PDF'.
Go the View or Print Watermarks Tab depending on whether you want a PDF watermark when printing, viewing, or displayed on both. From the Text Watermark tab add the text watermark that you would like to be displayed.

Lock and Add Watermark to PDF Video Review

#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