Switch from DigiSigner to pdfFiller for a Underline In PDF Online Solution For Free

Use pdfFiller instead of DigiSigner to fill out forms and edit PDF documents online. Get a comprehensive PDF toolkit at the most competitive price.
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

Switch from DigiSigner to pdfFiller in 4 simple steps

1
Sign up for free using your email, Google, or Facebook account.
2
Upload a PDF from your device or cloud storage, check the online library for the form you need, or create a document from scratch.
3
Edit, annotate, redact, or eSign your PDF online in seconds.
4
Share your document, download it in your preferred format, or save it as a template.

Experience effortless PDF management with the best alternative to DigiSigner

Create and edit PDFs

Create and edit PDFs

Instantly customize your PDFs any way you want, or start fresh with a new document.
Fill out PDF forms

Fill out PDF forms

Stop spending hours doing forms by hand. Complete your tax reporting and other paperwork fast and error-free.
Build fillable documents

Build fillable documents

Add fillable fields to your PDFs and share your forms with ease to collect accurate data.
Save reusable templates

Save reusable templates

Reclaim working hours by generating new documents with reusable pre-made templates.
Get eSignatures done

Get eSignatures done

Forget about printing and mailing documents for signature. Sign your PDFs or request signatures in a few clicks.
Convert files

Convert files

Say goodbye to unreliable third-party file converters. Save your files in various formats right in pdfFiller.
Securely store documents

Securely store documents

Keep all your documents in one place without exposing your sensitive data.
Organize your PDFs

Organize your PDFs

Merge, split, and rearrange the pages of your PDFs in any order.

Customer trust proven by figures

pdfFiller is proud of its massive user base and is committed to delivering the greatest possible experience and value to each customer.
740K
active users
239
countries
75K
new subscribers per month
105K
user reviews on trusted platforms
420
fortune 500 companies
4.6/5
average user rating

Get started with
an all‑in‑one PDF software

Save up to 40 hours per month with paper-free processes
Make quick changes to your PDFs even while on the go
Streamline approvals, teamwork, and document sharing
Decoration
G2 Badge
G2 recognizes pdfFiller as one of the best tools to power your paperless office
4.6/5
— from 710 reviews
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
Best Support - Summer 2025
Easiest Setup- Summer 2025

Instructions and Help about Switch from DigiSigner to pdfFiller for a Underline In PDF Online Solution For Free

Did you ever need to underline or cross out text in PDF documents?

Image

In the past, you probably had to print the document, underline words or phrases with a pen, and either scan the document or send a hard copy to wherever it needed to go. Besides needing a printer and a scanner, the process probably took you far too much time to complete.

Now there is a far easier way to underline text in PDF documents. You can simply use pdfFiller!

To get started, upload a document to your account and open it in the editor. To draw a line, click the Line icon in the main toolbar. The line toolbar will appear under the editing tools. Click where you want to create the start point and drag to where you want to create the end point, release the mouse button and click OK.

Image

To change the line’s color, click on the black square and choose the color you want. Use the slider before or after drawing a line to change its thickness. You can change the position of the line ends by dragging them. Finally, you can always delete any line you've drawn, just select it and click the trash can icon that will appear.

Image

To learn more about drawing lines in PDF documents online, please watch the following video:

When you use pdfFiller to underline text in PDF documents, you do not use paper, pencils, fax, and printer. And even better, you save yourself a lot of time! If you like being able to underline text in PDF documents online, you might be interested in a lot of other great features that pdfFiller has to offer including highlighting and erasing content, adding pictures, text boxes and sticky notes, and creating fillable fields. Check out these tutorials to see the other great things that pdfFiller can do for you!

01
To underline content in a PDF, upload your PDF document using pdfFiller's uploader.
02
Choose the 'Line' button in the 'Tools' tab and draw a line. You can drag and move the line anywhere in your document.
03
You can also click the 'Tools' tab and highlight, redact or erase text and images in your PDF.
04
When you're done with editing, click the 'Done' button and email, print or save your document.

pdfFiller is different from and not affiliated with Designer. With further questions about Designer products please contact Designer directly.

Our user reviews speak for themselves

Read more or give pdfFiller a try to experience the benefits for yourself
5.0
Great Product! I love this software; it has been invaluable. I have used it to fill out job applications, insurance, medical & school documents. I'll continue to use it. It is very easy to upload documents to this software. Editing is user-friendly even for those not technically savvy. I like that I have many options in saving or exporting my finished document. Also, I like that my previous documents are saved because there has been more than once that a document has been lost or needed again. I have been saved by the fact that PDF Filler has the previously used document saved. I have not found anything I really dislike about this software. I'll be honest in that I'm not crazy about the price but I have found this software so helpful I have been using it for over two years now. I've recommended it to several people. I did not rate the customer service because I have never used it. I guess the fact that I've been using this for over two years & never had a customer service issue speaks for itself.
McKenzie M.
4.0
I work with a lot of county documents that are locked for editing. PDFFiller makes it is so I can mark up and edit. This give me the ability to highlight and do take-offs with in the pdf. Thanks!
John

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
Upload your PDF to our design PDF tool. Create a new electronic signature to place on your document. Add text and date if needed. Click 'Finish' and download the signed document.
Open the PDF document or form that you want to sign. Click the Sign icon in the toolbar. The Fill & Sign tool is displayed. The form fields are detected automatically. Click the Sign icon in the toolbar, and then choose whether you want to add your signature or just initials.
Drag & drop PDF. Simply drag and drop your PDF into the area above or click on the link to choose your file. Sign PDF. To sign PDF online, click on the document, select a signature type, create your electronic signature, and add it to the document. Download PDF. Click DONE to save your changes.
A check or check mark (American English), checkmark (Philippine English), tickmark (Indian English) or tick (Australian, New Zealand and British English) is a mark (✓, ✔, etc.) used in many countries, including the English-speaking world, to indicate the concept "yes" (e.g. "yes; this has been verified", "yes; that is
Choose the 'Line' button in the 'Tools' tab and draw a line. You can drag and move the line anywhere in your document. You can also click the 'Tools' tab and highlight, redact or erase text and images in your PDF. When you're done with editing, click the 'Done' button and email, print or save your document.
How to Use the Add Check Mark in PDF Feature Access the website or open the app on your device. Sign in to your account. Upload the PDF document you want to add a check mark to. Once the document is uploaded, click on the 'Edit' button to enter the editing mode.
How to Insert a Tick Mark in a PDF Form? Launch the PDFgear application and open the PDF form you want to edit. Look for the “Tick” tool under the Form tab. Click on it to activate the tool. Move your cursor to the location on the PDF form where you want to insert the checkmark. Click to place it.
STEP 1: Launch the Adobe Acrobat application on your computer. STEP 2: Click on the fountain pen nib icon that says “sign document by typing or drawing a signature” in its label along the top menu toolbar. STEP 3: After the fill & sign menu bar opens, click on the checkmark icon.
Join 64+ million people using paperless workflows to drive productivity and cut costs