GroupDocs.Search Highlight in PDF app allows to highlight text online in a few clicks.

To highlight any word or phrase in your PDF, you may upload the PDF and type your query. Our search engine will perform indexing of your PDF file and then the highlighted results will be showed for you.
You will be able to add more documents to the index and perform fast search and highlight in multiple documents.

This Highlight in PDF app demonstrates possibilities of our solutions:

Highlight PDF and other files from anywhere – it works on all platforms including Windows, MacOS, Android and iOS.
All files are processed on our servers so no additional plugins or software installation is required.
All files are processed using GroupDocs.Search API.

PDF Portable Document

Portable Document Format (PDF) is a type of document created by Adobe back in 1990s. The purpose of this file format was to introduce a standard for representation of documents and other reference material in a format that is independent of application software, hardware as well as Operating System. PDF files can be opened in Adobe Acrobat Reader/Writer as well in most modern browsers like Chrome, Safari, Firefox via extensions/plug-ins.

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How to highlight in PDF

Click inside the file drop area to upload a PDF file or drag & drop a PDF file.
Once upload completes, you will be able to perform search and highlight in your PDF file.
Enter your search query in the search bar.
Get results by clicking the highlight button.
Add more files with "Add files" button.
Select added files to include them into the index and perform searches

Frequently asked questions

How does the online app Highlight in PDF work?

The highlighting of words in the text is performed in three stages. First, documents are added to an index. Then the index is searched. And only then the search results are highlighted in the text.
What about privacy, is it safe to use the online app Highlight in PDF?

Access to your folder with uploaded and indexed files is only available to someone who has a link. All uploaded files are deleted from the servers after 24 hours.
Is an internet connection required to use the online app Highlight in PDF?

This application is client-server. If you lose your internet connection while using the app, you won't be able to get search results.
Can I search on Linux, Mac OS, Android?

You can search from any device, regardless of the operating system, that has a modern browser and an internet connection.

Other file formats supported by Highlight app

You can also highlight in many other file formats. Please see the complete list below.

EPUB

FB2

CHM

MSG

EML

EMLX

HTM

HTML

MHT

MHTML

XHTML

XML

PPT

PPTX

PPS

PPSX

ODP

POT

PPTM

POTX

POTM

PPSM

XLS

XLT

XLTX

XLSX

XLSM

XLSB

XLA

XLAM

XLTM

CSV

TSV

ODS

OTS

DOC

DOCX

DOCM

DOT

DOTX

DOTM

RTF

TXT

ODT

OTT

Highlight in PDF

Highlight words and phrases in PDF. Perform search and highlight results in PDF files online.

PDF Portable Document

How to highlight in PDF

Frequently asked questions

How does the online app Highlight in PDF work?

What about privacy, is it safe to use the online app Highlight in PDF?

Is an internet connection required to use the online app Highlight in PDF?

Can I search on Linux, Mac OS, Android?

Other file formats supported by Highlight app