Add Watermark to PDF Online for Free
A free, easy-to-use online tool to watermark your PDF pages in seconds. Simply upload your PDF, customize your watermark settings, and download your protected document.

Customize Your Watermark: Text, Position, Size, and Opacity
Watermark Options
Font Family: Helvetica Times Roman Courier
How to Add a Watermark to PDF Free in 4 Steps
1. Upload Your PDF
Click to select or drag and drop your PDF file into the tool.
2. Customize Your Watermark
Set your watermark text, then adjust the position, size, opacity, and font to match your needs.
3. Preview & Confirm
Use the zoom view to preview exactly how your watermark will appear across your PDF pages before downloading.
4. Download Your Watermarked PDF
Click download and get your fully watermarked PDF instantly for free.
Why Use Our Add Watermark to PDF Tool ?
The easiest way to add a watermark to any PDF.
Lightning Fast
Add a watermark to your PDF in seconds. Upload, customize, and download — the whole process takes less than a minute.
100% Free
No hidden fees, no subscription required. Add watermarks to as many PDFs as you need, completely free.
Privacy First
Your PDF is processed securely in your browser and deleted after 2 hours. We never store or share your documents.
Full Watermark Customization
Control your watermark text, position, size, opacity, and font so it looks exactly the way you need it.
Live Preview Before Download
See exactly how your watermark will appear across every page before you download.
Works on Any PDF
Whether it's a contract, report, invoice, or certificate, our tool adds watermarks cleanly to any PDF document.
Build Document Automation That Scales With APITemplate
APITemplate is an API-first platform that generates professional PDFs and images at scale from reusable templates, raw HTML, or URLs. Integrate via REST API, SDKs, or no-code tools like Zapier, Make, and n8n.
Create Document Templates with Visual Editor
Create stunning PDFs using our WYSIWYG Template Editor. With its user-friendly interface, you can design templates visually — no coding required.
Combine your designs with JSON data to generate dynamic, fully-customized PDFs tailored to your needs. Perfect for invoices, reports, certificates, and more.

Convert HTML to PDF
Convert HTML to PDF using APITemplate.io’s powerful HTML Template Editor. Combine your HTML, CSS, and JavaScript skills with dynamic JSON data to create custom templates that deliver pixel-perfect PDFs.
Our PDF generation solution supports modern web technologies, enabling seamless integration for your automated workflows, reports, and more.

Customer Reviews
Trusted by businesses worldwide to generate millions of PDFs and images reliably.
See what our customers have to say
Jamie DearFounderWe are very grateful to Jacky and the team at APITemplate - their software has helped us to auto-generate high quality images for our student reports. It has been the perfect fit for us as we grow our Oxford summer school.
Alex DowdingVice SecretaryThe Wheelchair Football Association
We've successfully automated YouTube thumbnails and match event creation for our Powerchair Football league using your templates. It integrates with our Postgres database on retool.com, is expanding to include league table graphics and match results. Thanks to an AWS Inclusion and Diversity grant, we're enhancing our live-streaming workflow, further boosted by your product's automation capabilities. We're grateful for your excellent service and wanted to share our positive experience.
Nishitha DhanekulaCofounder /CTOAt askreferral.io, We are building referral networking platform for people to pitch and generate leads for different kinds of referrals, including, but not limited to job referrals, product referrals, funding referrals, realtor referrals etc. Having a vibrant social media community is crucial for our growth and APITemplate.io played crucial role in automating generation of digital posters for job postings, profile pitches, funding requests etc, to help us grow from 0 to 200K+ followers in LinkedIn in less than one year.
Danaé NicolasCTOWe've been using APITemplate.io to generate social images for our karting races and it's been a huge time-saver. The support team is super responsive and helpful - they quickly resolved an issue we encountered. We highly recommend this tool to anyone who needs a similar solution.
Ryan TurnbullIT ManagerAPITemplate.io is such an easy application to use. Simple, intuititive, and code free. At simplehuman, we render all our commercial invoices, dispatch notes, and multiple other templates. The ability to create multiple layouts, and group them into a logical container - makes our lives much simpler. This is a great tool to use, both affordable, and the support service turnaround time is second to none! Defintely worth the subscription!
Ron P.Product ManagerHad an issue with template implementation via Make and reached out for support. Within minutes, I got a response and was soon on a Zoom call resolving it. Despite the issue not being directly related to APITemplate.io, their team efficiently guided me to the right formatting. Many thanks!
Nicholas GertzProduct OwnerWe have been using the service daily in our application for a year and are very satisfied with the reliability. It meets all our requirements and requests for changes/improvements can be discussed directly with Jacky 1:1. Thanks and greetings from Germany
Lucas FridmanChief Product OfficerWe use APITemplate to generate key documentation we need to work with our industry partners. We are building a digital solution in an antiquated industry, which means we need to communicate data to our partners in the format that they are accustomed to (pdf forms). APITempate makes it easy for us to do this!
Jean-Paul HornPublisherWe love APITemplate.io for its simplicity and ease of use. Just setup once and "forget" about it due to its fabulous 3rd party integration. New features are regularly added, and reasonable custom requests are honoured within days.
Kevin FrickēAPITemplate.io is one of the best services I have worked with in a very, very long time. They are super responsive and a joy to work with. If you are struggling with PDF's, like I was, check 'em out!
Jacob MonashAutomation SpecialistWe run conferences with a number of speakers, each requiring an individual speaker profile. We used to create all of these profiles manually, but by incorporating APItemplate into our Zapier workflow, our team can generate a complete image with all of the speakers information in one click. Using the template editor is a bit of a learning curve, but the support team is very responsive and helpful.
George CooperAPITemplate.io is great. I love being able to quickly use HTML and CSS templates with dynamic variables to create documents. Support is also fast and responsive. Great vendor!
Frequently asked questions
What is a PDF watermark adder?
A PDF watermark adder is a free online tool that lets you add text watermarks to your PDF pages. Simply upload your PDF, customize the watermark settings, and download your watermarked document.
Can I add a text watermark to a PDF without Adobe?
Yes. You don't need Adobe Acrobat or any paid software. Our free online PDF watermark tool lets you add custom text watermarks directly in your browser on any device.
Will the watermark appear on every page of my PDF?
Yes. The watermark is automatically applied to every page of your PDF, so your entire document is consistently protected or branded.
Can I make the watermark transparent or semi-transparent?
Yes. You can control the opacity of your watermark from fully visible to subtle and semi-transparent. So it doesn't overpower the content of your document.
Is it safe to upload confidential documents to add a watermark?
Yes. Your PDF is processed securely and the data is not stored on our server.
Can I position the watermark anywhere on the page?
Yes. You can set the Position X (left, center, right) and Position Y (top, middle, bottom) of your watermark, and further fine-tune its exact placement using the Offset X and Offset Y values. Once you're happy with the position, click Apply and Download to get your watermarked PDF.
Does adding a watermark change the quality of my PDF?
No. Our tool adds the watermark without affecting the original formatting, text, images, or quality of your PDF document.
Can I also protect or lock my PDF after adding a watermark?
Yes. Once you've added your watermark, you can use our free Lock/Unlock PDF tool to password-protect your document for an extra layer of security.
Can I compress my PDF after adding a watermark?
Yes. If your watermarked PDF is too large to share, use our free Compress PDF tool to reduce the file size without losing quality.
How to watermark PDF pages online?
- Go to the online watermark tool.
- Click on the 'Select a PDF' button to upload your file or drag and drop the PDF into the designated area.
- Enter the watermark text you want to add in the 'Watermark Text' field.
- Adjust the settings such as font size, rotation, opacity, font color, and font family to customize the watermark.
- Set the position X and Y, then use the offset values to fine-tune where the watermark appears on the page.
- Click 'Refresh' to preview your changes in the preview pane.
- Once you are satisfied with the watermark, click 'Apply and Download' to download your watermarked PDF.
What is APITemplate.io?
APITemplate.io is designed for generating PDF documents from reusable templates. It can be easily integrated with popular tools like Zapier, Airtable, Make.com, Bubble.io, n8n, UiPath, or directly via REST API, making it highly adaptable to various workflows.
There are three main ways to generate PDF documents using APITemplate.io:
- Template-based PDF generation: Create PDFs from predefined templates.
- HTML to PDF generation: Convert HTML content directly into PDF format.
- URL to PDF generation: Convert entire web pages to PDFs by simply providing their URLs.
The platform also supports custom CSS and JavaScript, allowing for advanced styling and customization. Its powerful template engine ensures that you can create complex documents efficiently, while the API Console enables you to preview and customize JSON data instantly.
In addition, APITemplate.io offers support for adding custom headers and footers, including page numbers and total page counts, making it an excellent choice for creating polished, professional PDF documents.
Related Free PDF Tools
Whatever comes next, compressing, merging, splitting, or converting APITempate has a free tool ready for it. Explore all free PDF tools and keep the work moving.
Still Adding Watermarks to PDFs One by One? Automate It.
Use our PDF generation API to programmatically generate bulk watermarked PDFs from reusable templates or raw HTML. Pass your data via REST API, or connect your workflow with no code platforms like Zapier, Make.com, or n8n.






