Last updated on
Sep 21, 2025
Add Watermark to PDF and Lock PDF for free
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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
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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:
After being turned off by the original warning about not being able to submit the forms to the government, which I think is CONFUSING, I kept digging in and found that once you pay they are acceptable. Now LOVE IT
2015-01-29
I was in a total jam and needed forms right away. I was so afraid my only option was to type all these required forms and then have to write in the answers with a pen. It would have taken me days to complete! When I discovered PDFfiller online it was like my guardian angel had guided me to the site! The user friendly site was easy to navagate and had easy to understand instructions. I'm very much impressed with your product and when I need another PDF form, I most certainly will use your product again. Thank you so much!
2017-01-05
PDF filler enables to use activities that i have found that i can put in to another language. As the resources for the children i teach are scarce PDF filler opens up more opportunities for me as a teacher of another language.
2017-09-29
So far it is wonderful but I've got to continue further to see if it is all that and the cake and ice cream at that time I should give 5 Bright Shining Stars!!
2018-09-10
Easy to use, the functions are very intuitive
Easy to complete documents online and share electronically instantly
Pdf filler is very easy to set up and use. The monthly fee is at a low cost. Using this service makes completing and sharing electronic documents simple and efficient.
It is not free but is a very good value. You can try it for free to see how the program works but if you chose to use it, you will pay a small fee before you can print or send a completed document. Some pdf files are not compatible or are difficult to get the text exactly where I want it.
2017-11-24
I've used this software before, but I find Pdf Filler a bit better for my use. I need to learn the software better, because if it continues to help in my work I will be a loyal client.
2022-02-19
PDF filler were fantastic.
PDF filler were great. I used the service when I needed and signed up the subscription service. I had a lot IRL things going on and forgot about it. They issued a refund anyways when I asked. Really great customer service from them when needed. Thanks to Jerome.
2022-02-01
I needed to use the service for an application! It was only needed once. The day I was going to cancel it due to no longer needing the service the money had already come out of my account. They immediately refunded it and even offered a discount if I wanted to continue using it. I highly recommend it was an easy to use service with many benefits packed in. Customer support replies quickly and they are very professional.
2020-10-15
this service has literally saved my…
this service has literally saved my life numerous times and has been the direct conduit to expanding my business endeavors and as a result my wallet this pdf service is hands down the easiest to use while functioning extremely comprehensive automated pdf editing software designed to impress all who receive the impressively emulated and 100% authentic documents off all types look no further trust me I did and had to suffer the other pdf editors witch ALL pail in comparison to the behemoth that is PDF filler
2025-04-24
Add Watermark to PDF and Lock PDF Features
Ensure your documents maintain their integrity and authenticity with our Add Watermark to PDF and Lock PDF features. You can effortlessly add a watermark to your PDF files and secure them against unauthorized changes. This combination not only protects your work but also enhances your brand visibility.
Key Features
Easily add custom watermarks to your PDFs for branding
Lock PDFs to prevent editing or copying
Support for text, image, and logo watermarks
User-friendly interface for quick usage
Compatible with various PDF formats
Potential Use Cases and Benefits
Ideal for businesses wanting to brand their documents
Great for freelancers protecting their designs and work
Useful for legal documents that require security
Perfect for informative PDFs that need consistent messaging
Beneficial for educators distributing course materials
By using these features, you can solve the problem of document misuse and unauthorized changes. Secure your work with an effective watermark, and lock your PDF files for peace of mind. Let your creativity flourish without fear of compromise.
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?
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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 add a watermark to a PDF document?
Insert Watermark into PDF After opening the document, go to the “Edit” option and select “Watermark”, and then click “New Watermark” from the submenu. You will be presented with a new window. Choose whether you would like a text, file, or image watermark, and specify the watermark location.
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