Merge and Add Watermark to 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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Discover the simplicity of processing PDFs online

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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:
I really like the fact that I can download PDF files, fill them in and save them on my computer. Once they are saved I can then print them or go in and change them.
Sallie M
2014-05-17
This is a very good program but the monthly fee is high. It would be well worth the cost if you were filling out hundreds of pdfs each month, but for one or two forms, it's hard to justify the expense.
Anonymous Customer
2014-09-11
Wish that the tools were better on the app. Very limited there. Also that there was a square/box that could be drawn, not just the addition of a circle.
Nicola C
2015-10-11
I enjoy the forms you can search and fill out and all of options you have to mail out the forms. The site just needs to be a little bit more easy and user friendly in regards to filling out forms and form searches
Cher
2018-01-29
It's probably just me but it's hard to figure out what does what.Also trying to figure out what I can move on a PDF and what I have to erase and fill-in again. Otherwise I think it's one of the best. I should also say seems be working with my Dragon NaturallySpeaking
Gene W
2019-04-11
Very helpful tool, was able to do all that I needed using it. Rate 5/5, recommend to everyone who needs to edit/sign PDF files and quickly share them.
Mario
2020-04-04
Amazing software! Amazing software! I was trying to process W-2's through another accounting program and it was a nightmare. My boss told me about pdfFiller and I love it!!
VK
2022-01-28
I activated to try for the first time and only needed for a single transaction. Very easy to use and should I need a service in the future, would definitely purchase.
Stephanie S
2021-01-10
Still learning... but so far so good. Convenient user interface, able to quickly make the necessary edits to my documents and I'm enjoying using the product.
Shira M
2020-04-25

Easy Merge and Add Watermark to PDF and more, using pdfFiller

In case you have ever been fed up with using single-function programs where you are only able to complete just one manipulation, we understand how you feel. Hours are spent switching back and forth between numerous options. Using pdfFiller, you can start to get your time back and complete work faster.

Why pdfFiller? It's a professional, online-based PDF editing tool that actually works from the cloud. Just open a web browser, log in to your account, pick a document template, and Merge and Add Watermark to PDF immediately. The process of editing files in PDF is quick and simple, effortless even. An advanced set of features enables you to do what you need and more. Take a look at some helpful features available with pdfFiller:

01
Templates. Generate reusable documents and fill them out as many times as you want
02
signatures. Certify agreements and contracts right from your device
03
Fillable fields. Insert to let others to enter data
04
Watermarks. Protect your template
05
Extensive export. Send a document by email or fax, transfer it to the cloud storage, or simply download a sample in one of the available formats: PDF, DOCX, XLSX, PPTX, and JPG
06
Layout management features. Rotate, add, or delete pages to make it work for your specific situation

pdfFiller is not only suitable for Merge and Add Watermark to PDF but keeps the data safe. Your data is stored and transferred among the web servers strictly following the GDPR standards. We create a secure connection whenever you sign in to your account and keep information in an encrypted form so that the chance of unauthorized access to your profile is nearly impossible.

Value your time and get started with pdfFiller today for a more streamlined approach to document management.

Merge and Add Watermark to PDF Feature

The Merge and Add Watermark to PDF feature streamlines your document management process, allowing you to combine multiple PDFs into one cohesive file while overlaying a custom watermark. This functionality not only enhances organization, but also adds a layer of branding and protection to your important documents.

Key Features

Combine multiple PDF files seamlessly.
Add personalized watermarks to protect your content.
Maintain the quality of your PDFs during merging.
User-friendly interface that simplifies the process.
Fast processing time for efficient workflow.

Potential Use Cases and Benefits

Integrate reports from various departments into one file for meetings.
Create branded proposals with your logo as a watermark.
Protect sensitive documents from unauthorized use.
Compile educational materials into a single PDF for students.
Prepare legal documents by merging and marking them appropriately.

This feature solves the problem of managing numerous PDFs by allowing you to merge them effortlessly. Additionally, it safeguards your documents by adding a watermark that clearly identifies your ownership. Experience improved organization and enhanced document security with just a few clicks.

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.
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.

Merge 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