About us
English
Underline in PDF on Windows
Easy Text Underlining in PDFs on Windows
or drag and drop a file
Supports PDF and image file formats (maximum 100MB)
By using the product, you agree to our Terms of Service and have read our Privacy Policy.
Trusted by Millions Worldwide
4.4
2,100+ reviews on G2
4.4
8,200+ reviews on Capterra
4.4
73,000+ reviews on App Store
248M
Registered Users
5B
Notes Created
2M
Notes Created Daily
Frequently Asked Questions
Use the highlight tool to simulate underlining. Choose the highlight color, apply it to the line of text, and download the annotated PDF.
Yes, you can underline text in PDFs with your Windows 10 browser. Upload your PDF, use the appropriate annotation tool, and save your changes.
Underlining PDFs is free up to the document preview. A registered account is needed to download the annotated PDF.
Yes, you can use the PDF annotation tool on Windows 7 with a compatible browser. Upload your PDF and use the available tools to underline text.
The annotation tool supports PDF and image formats such as JPG, JPEG, PNG, and WEBP. It also supports multi-page PDFs.
Yes, you can annotate PDFs with a web browser on Windows Server. The tool is browser-based and suitable for various Windows environments.
As long as your browser is compatible, you can use the annotation tool on Windows XP. Upload your PDF and select the highlight tool to underline.
Yes, the tool works in the Edge browser on Windows. Open your PDF in Edge, access the tool's features, and make the necessary annotations.
Though 'Windows Media' is not a platform for PDF annotations, you can use this tool in any web browser in the Windows environment to annotate PDFs.
Yes, the annotation tool is compatible with Windows 11. You can underline text in PDFs with any modern web browser.
No, Notepad does not support PDF annotations. Use our tool to add annotations to PDFs directly via a web browser.
Windows Defender is a security tool and does not support PDF annotations. Use a web browser to utilize our annotation tool for PDF editing.
The tool doesn't edit existing PDF text, only supports one file at a time, and is limited to desktop browsers.
Collaboration features are not available. Each session is intended for individual use, and teamwork must be coordinated externally.
The maximum upload size is 100 MB, ideal for most standard PDFs and image files.