Last updated on
Sep 21, 2025
Lock and Add Watermark to PDF 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.
Customer trust by the numbers
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Top-rated for ease of use
Create, edit, and fill out PDF documents faster with an intuitive UI that only takes minutes to master.
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What our customers say about pdfFiller
See for yourself by reading reviews on the most popular resources:
I LOVE THIS SERVICE SO FAR. IT HAS ALLOWED ME TO CREATE THE DEMOGRAPHICS FORM FOR TAX PAYERS IN THE LAY OUT THAT I ALWAYS DESIRED. THE BONUS TO THE LAYOUT IS THE PDF FILL IN THAT ALLOWS YOU TO INSTRUCT THE CLIENT RIGHT WITHIN THE CELL. THE SEND TO SIGN FEATURE IS AMAZING IT ALLOWS ME TO OFFER A FASTER SERVICE WITH OUT HAVING TO HAVE A PERSONAL INTERVIEW.
2017-01-11
Need to have more option to edit a document, like Microsoft Word.
When editing a document, there needs to be page breaks added. it appears as one long document until you go to turn it into a PDF where it is then broken into pages. It is impossible to get the spacing right since you have to go back and forth with the document.
2017-07-26
I did not like the way my card was charged the $120 initial annual fee. I only wanted to pay by month. That was misleading and I did not appreciate it. If your going to offer the monthly plan, offer it, make the wording more clear. don't try and trick people into the yearly plan and make them go through customer service to get the refund. The reason I give four stars is because (1) the customer service rep was so helpful in getting me my refund back and (2) you have an awesome product. It is really working well for me.
2017-12-27
What do you like best?
The forms are easy to access real time and are user friendly.
What do you dislike?
There wasn’t anything that I disliked about using the forms.
What problems are you solving with the product? What benefits have you realized?
The forms have proven very useful in the preparation and filing of business income taxes.
The forms are easy to access real time and are user friendly.
What do you dislike?
There wasn’t anything that I disliked about using the forms.
What problems are you solving with the product? What benefits have you realized?
The forms have proven very useful in the preparation and filing of business income taxes.
2018-01-02
What do you like best?
I like the fact that live Customer service is always there to guide you if there's a problem.
What do you dislike?
The only thing I dislike if when a large corporation wants a form filled out and you use PDF Filler they come back and tell you their shop uses Adobe Acrobat and to please fill out the form once again using Adobe.
Recommendations to others considering the product:
I'd recommend it
What problems are you solving with the product? What benefits have you realized?
It has saved me many hours of editing and signing contracts and agreements
I like the fact that live Customer service is always there to guide you if there's a problem.
What do you dislike?
The only thing I dislike if when a large corporation wants a form filled out and you use PDF Filler they come back and tell you their shop uses Adobe Acrobat and to please fill out the form once again using Adobe.
Recommendations to others considering the product:
I'd recommend it
What problems are you solving with the product? What benefits have you realized?
It has saved me many hours of editing and signing contracts and agreements
2020-01-09
Great versatile tool
Great versatile tool. Was very pleased with its performance. They even gave me a month refund when I didnt complete the cancellation of subscription properly. Very pleased with their performance and professionalism.
2021-11-04
I just love this program as we can…
I just love this program as we can ensure that any of our forms get filled out and look professional all the time.
2021-09-27
Kara was excellent
Kara was excellent, she handled my query quickly and efficiently. She sent me confirmation emails as requested. In short, I couldn't have asked for better customer service. Thank you.
2020-12-24
this is amazing, I am a real custoner who cannot be...
this is amazing, I am a real custoner who cannot be bothered to write.a long review. But I can honestly say that this is it! Pay for it, absolutley worth it
2020-06-17
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.
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
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 lock a PDF watermark?
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'.
How do I protect a watermark in 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.
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