Stay mobile Underline PDF on Smartphone For Free

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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+
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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:
My only disappointment with PDFfiller was that I did not know it was a subscription based service since I clicked through a google link to a specific form. I made customer care aware of my concern and they were immediately responsive and apologetic fir the issue. Completing, saving, and printing the forms I needed was easy to learn and do.
Chris H
2014-08-25
Haven't been able to add a blank page to the 3 page form I was working. The instructional video indicated I should see a "Pages" icon on the Edit line. I didn't.
Daniel J. T
2014-09-27
I like that I can quickly sign something without printing and scanning signing and scanning again. I can send this out right from here via my email, haven't checked Gmail records yet, but if they've been recorded there, I think I will use this app for years to come.
CM B
2018-04-14
Very easy to navigate and use Very easy to navigate and use. The plan is very much worth it if you plan to use and print a lot of documents. I would highly recommend using PDF filler for all of your personal and legal documents.
Jessica Pirkle
2024-05-23
It was so easy and convenient to send… It was so easy and convenient to send documents to IRS and I used the customer service/help desk and they were very knowledgeable and answered my questions promptly. First time user and I'm impressed!
Rebeca Mata
2022-02-06
What do you like best? Ability to edit pdf files and general ease of use What do you dislike? Limitations on how many files I can upload and the fact that it opens the files immediately, If I want to merge a newly uploaded files with previously saved files on my dashboard, it creates some unnecessary steps. What problems are you solving with the product? What benefits have you realized? Not really any problems - just a few areas the program feels clunky.
Consultant in Insurance
2020-08-18
It is a great tool that anybody can use It is a great tool that anybody can use. It does not matter what type of business, school, or type of work you do you will get out of this service if you have to continually deal with PDF documents. Do you need to sign something? Check. Do you need to change a shipping label by a major retailer for a return? check. Tax documents? check. For real, I'm just a regular stay at home dad and I use this AT LEAST twice a month.
anonymous G.
2020-07-18
PDFfiller was an easy and convenient… PDFfiller was an easy and convenient service to use. I filled out my PDF no problem and saved my documents. The customer support team was extremely helpful and accommodating when I needed to change my plan. Highly recommend!
Emma
2020-06-10
Simple and easy document solutions Its been less than 2 weeks and I have used this service quite a few times to fill in documents or customize documents. Its been extremely user friendly and I really like the verified signature feature. Its has simplified my document process so much. I'm looking forward to using these for Insurance accord documents which I see they have in the database for use.
INSUREGO USA AGENCY LLC
2020-04-28

Is it possible to Underline PDF on Smartphone?

Have you ever been sick of having to carry a laptop around wherever you go, so that you can keep working with your documents? Perhaps you have lost clients because of an inability to Underline PDF on your Smartphone? By using pdfFiller, you're getting the solution that frees you from relying on software that isn’t cloud based, to enable you to work from any device, anywhere.

pdfFiller is the leader in online document management, which doesn't mean it’s complicated to make use of. Underline PDF on Smartphone and more:

01
Add new objects. Insert texts, crosses, checkmarks, images, text boxes, or simply draw on a document
02
Request additional authentication. Ask recipients to confirm their identity by taking a photo or linking social media profiles
03
eSign documents. Create a legally-binding signature and send a form for signing in seconds
04
Simplify collaboration. Highlight content or add comments for your colleagues
05
Convert files. Save your records as files in PDF, Word, Excel, or PowerPoint formats
06
Export content. Share samples via links, emails, messengers, or fax
07
Cover sensitive data. Use the Blackout option to hide delicate information that shouldn’t be spread to third parties

Handle documents like a professional. Do business right from your browser or install the application. Regardless of your choice, all your information is protected with the latest encryption features, so that nobody could get unauthorized access to your data. Don't wait, take advantage of professional document management now!

Stay Mobile: Underline PDF on Smartphone Feature

Stay mobile and enhance your productivity with the Underline PDF on Smartphone feature. This tool provides you with an effortless way to mark important text while on the go. If you often read and review PDF documents from your smartphone, this feature is designed for you.

Key Features

Easily underline text in PDF documents directly from your smartphone
Save and share your annotated PDFs with others
Access your underlined documents anytime, anywhere
Simple and user-friendly interface for quick edits

Potential Use Cases and Benefits

Review important documents during commutes
Highlight key points for study preparation
Share annotated PDFs with colleagues for collaborative projects
Organize personal notes and reflections on important readings

This feature addresses a common problem: the difficulty of making notes on-the-go. With Stay mobile's Underline PDF on Smartphone, you can quickly highlight important sections without needing to print documents or carry bulky notebooks. Whether for work or personal use, this tool makes it easier to keep track of your thoughts and ideas directly within the documents that matter to you.

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
Choose Tools > Comment, and select the Highlight Text tool , the Strikethrough Text tool , or the Underline Text tool .
Step 2: Click on the 'Open File' button to open PDF files to the PDF annotator. Step 3: Go to the 'Comment' tab and select markup tools to annotate your PDF file. There are several annotate tools, such as highlight, strikethrough, shapes, pencil, sticky notes, stamps and more.
To accent text or images, tap and hold the Highlight icon. Select either the Highlight, Underline, or Strikethrough option, then at the bottom of the screen, expand the Styles menu to further customize your selection.
To create a highlight, tap the center of your screen to bring up the Action Bar. Tap the Annotation Toolbar, then the Highlighter icon. Drag the marker with your finger to the end of a sentence or paragraph to highlight the text.
How to Underline Text in a PDF on iPhone Open the PDF document in Highlights. Tap the PDF you want to open in the Highlights document browser: ... Select the text you want to underline. This will bring up the selection popover: Tap the underline button in the selection popover.

Video instructions on how to Underline PDF on Smartphone

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