Accelerate the way you Underline PDF on Website Gratis

Drop document here to upload
Select from device
Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
Note: Integration described on this webpage may temporarily not be available.
0
Forms filled
0
Forms signed
0
Forms sent

Discover the simplicity of processing PDFs online

Card illustration
Upload your document in seconds
Card illustration
Fill out, edit, or eSign your PDF hassle-free
Card illustration
Download, export, or share your edited file instantly
Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal

Every PDF tool you need to get documents
done paper-free

Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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.
Card illustration

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:
This is an excellent program; however certain functions are difficult, especially "moving text" and aligning the text to create a uniform picture.
Howard C Carter J
2014-07-01
I love it. I will definitely renew when the time come. The Military offer me a free site for forms filler but I can never open it on my personal computer. I have to use it on the government issued computer.
Sallie M
2014-12-21
The user interface is a bit clunky, but I highlyAppreciate being able to edit and modify simple legal documents in one visit. No long delays waiting on preparation!
Margie H
2015-08-20
Its great, it is exact what I was looking for. I've spent a lot of time and effort with other product/services that say they will deliver but fall short/fail actually at doing so. PDFFiller is impressive and has maintained its promised promises of delivery.
Toby L
2017-09-28
Very useful. Some issues with mobile devices filling out fillable forms and not all the data showing up on the completed form. Loading times could be a little faster. Also, I shouldn't have to give the app approval to access my email each time I upload a new file from my gmail account. Once should be enough, and the connection should be remembered, but it's not.
Eric P
2017-12-05
Very helpful!! Having this product on my day by day is being great. I convert a lot of documents from pdf to Word to review and compare documents. This make my work easier. Convert documents from pdf to word, very easy!! I would love to compare documents directly in the program, and not have to convert it to Word before it.
Maria M.
2019-05-28
I use a clunky chromebook and needed to… I use a clunky chromebook and needed to fill in an enormous health history form. This pdf filler was the easiest experience I have had with one of these assists. As I rarely need to do this I did not continue the subscription and the customer service was excellent I do highly recommend pdfFiller.
Kathleen Jones
2022-01-08
I am extremely pleased with the… I am extremely pleased with the services and I recommend pdffiller to everyone who needs to make /remake documents in PDF.
Branka Mudrinic
2020-06-04
The form was free The form was free, really free and didn't require me to pay to download my document as other sites do. It was easy to use with instructions provided. I loved the check mark option.
Linda Mead
2025-03-16

Learn how to Underline PDF on Website within minutes

People are getting limited regarding selecting a platform for dealing with PDFs. Many run into troubles with compatibility, even if making use of common operating systems like Android and iOS. We've prepared a few tips that may help you streamline your search for tools to Underline PDF on your Website.

Underline PDF on Website faster than ever with pdfFiller:

01
Fast import. Store documents in your preferred storage. You can always upload them from your internal memory, import them from the cloud, or use a link or email.
02
Straightforward interface. Select all the required tools in a maximum of two clicks. There are no hidden buttons and lots of dropdown menus.
03
Quick login. Use your credentials or social media profiles to access your account.
04
Convenient export. Send a document by email, archive it in the cloud, submit it to the IRS, or simply download it.
05
Constant platform improvements. Benefit from monthly innovations and development.

Among lots of web solutions, you should pay attention to pdfFiller. It meets all the requirements mentioned above and enables anyone to handle PDFs professionally. No tedious tutorials. No specialized skills. No paper mess. The only thing you need to operate effortlessly is a web browser and an account. Our solution will assist you with all possible PDF issues as you explore the product; it provides you with even more than the feature to Underline PDF on Website. Quite a few other helpful functions that you can locate on the platform will transform the routine of editing PDF files from a tedious task into a smooth and straightforward process.

Go to pdffiller.com, create your account, and enhance the way you manage documents!

Accelerate the Way You Underline PDF on Website

Enhance your document workflow with our innovative underlining feature designed for PDFs on websites. This tool allows you to emphasize key points efficiently and seamlessly, improving your review process.

Key Features

Fast and intuitive underlining tool
User-friendly interface for easy navigation
Compatible with various PDF formats
Supports multi-user collaboration
Accessible from any device with internet access

Potential Use Cases and Benefits

Students can underline lecture notes directly from provided PDFs
Professionals can highlight important contract terms during reviews
Researchers can mark crucial data points in scientific papers
Educators can prepare annotated materials for students

This underlining feature effectively addresses the challenge of keeping track of important information in PDFs. By allowing you to highlight relevant sections quickly, it reduces the risk of missing key details. Enjoy enhanced clarity in your documents and streamline your review processes.

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
Simply select the file you want to edit, and use the online PDF editor to update, delete or edit text directly on your PDF pages. Click on the text block to access the editing tool and start typing, formatting or adding hyperlinks to the text as needed.
Highlight, strikethrough, or underline text Choose Tools > Comment, and select the Highlight Text tool , the Strikethrough Text tool , or the Underline Text tool . Note: ... Drag from the beginning of the text you want to mark up. ... (Optional) To add a note, double-click the markup and add text in a pop-up note.

Video instructions on how to Underline PDF on Website

#1 usability according to G2

Try the PDF solution that respects your time.
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal
Trust Seal