Stay mobile Highlight PDF on Smartphone For Free

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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:
At first was a bit different in look and function but after a short time became very easy and logical to use. Still wish you could print directly from editing screen.
Hank
2016-03-02
On first blush,this is a fine tool. I have a limited number of documents. So this works great. Simple. Easy to follow. Support answered some not so obvious questions quickly and easily. Well done. I have one question or suggestion..I would like to merge a couple of my documents...but don't want to pay for a full upgrade for just two or three uses. Can you offer a "yeah we'll let you do this" one off pricing for someone like me? Would be very helpful. (I will also say I tried several of the competing products...and this was far easier to use)
John S
2017-04-20
I am an old school person, but found your form so easy to use. I travel a lot so I will be using a lot. Thank you so much for simplfying the process.
Anonymous Customer
2018-04-13
I like how the PDF filler has been easy to work with but I think there should be a separate cost for those of us not using the filler all the time. Its expensive at the moment for me.
Nyambura L
2019-07-05
Helpful for Digital Signature Overall the PDF filler is amazing and free! These days, a lot of people don't have printers and scanners. Also, a lot of us are working from home. This software makes it possible to sign documents without printing and scanning. My least favorite thing is that you have to create an account to save your document. It would be nice to not have to provide my email to save the document.
Courtney T.
2022-06-09
I love not having to print forms, then fill them out and scan them. So much time, ink and paper wasted. Using PdfFiller I just upload the document, fill it out and send. Super easy.
Sherry S
2021-01-28
I need to learn more about the… I need to learn more about the pdffiller. I am interested to know other features to assist in my tax practice.
Isidra Martin
2020-12-21
It is simple to use however I am unable… It is simple to use however I am unable to remove anything done in Microsoft paint prior to me working on the document.
John White
2025-05-01
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

Highlight PDF on Smartphone hassle-free

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

pdfFiller is a web-based PDF editor with advanced functionality for smartphone users and enables you to Highlight PDF on Smartphone just like you would on your computer or laptop. You can actually do both and get your documents instantly synced through the cloud. Utilize the website, desktop app, or the mobile app. Check out the list below for the best features available on mobile:

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

If you jump into the pdfFiller's functionality, you can explore even more helpful tools and make your on-the-go document management considerably more efficient and straightforward. Consider using it to avoid throwing away your energy on carrying your laptop around. Get everything you need for professionally dealing with PDFs. Register now!

Stay Mobile with Highlight PDF on Smartphone Feature

Stay Mobile offers a powerful feature that allows you to highlight key sections of your PDF documents right on your smartphone. With this feature, you can effortlessly interact with your important files on the go.

Key Features

Highlight important text in PDFs instantly
Save your highlights for easy reference
Share highlighted sections with others
Access your highlighted documents from any device
Simple interface for a smooth user experience

Potential Use Cases and Benefits

Students can mark important study materials for quick review
Professionals can highlight crucial data in reports during meetings
Researchers can emphasize pivotal information in academic papers
Anyone can organize their reading by marking essential sections

This feature solves your problem of managing and navigating through lengthy PDF documents easily. By highlighting key text, you gain quick access to relevant information, making reviewing and sharing simpler and more efficient.

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
PDF Max - The #1 PDF Reader! PDF Max is another reliable app for annotation, reading, or editing your PDF file documents straight from your Android devices. It lets you to make the documents with handwriting and highlights, insert stamps and text, sign and even edit the PDF pages.
To do this: Open the file in Preview on an Android phone. Tap on the annotations icon at the bottom of the preview screen to open the annotations toolbar. ... Next, select the highlight text tool. Tap and drag on a section of text within the file itself to highlight it.
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. To change the color of the highlight, tap and hold the text to bring the popup menu. Tap Style to change the color, opacity or even annotation type.
To do this: Open the file in Preview on an Android phone. Tap on the annotations icon at the bottom of the preview screen to open the annotations toolbar. ... Next, select the highlight text tool. Tap and drag on a section of text within the file itself to highlight it.
Tap and hold the Pen icon to select either the Pen or Highlighter option. This allows you to draw or write freehand, with a Pencil or stylus, or your fingertip.
The basic steps to highlight PDF files on mobile devices are almost same. You can download the PDF highlighter App on your devices, open the PDF file with the APP and then find the PDF annotation tools to highlight and annotate the PDF file on your mobile devices.

Video instructions on how to Highlight PDF on Smartphone

#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