Free PDF Highlighter
Add a translucent highlight rectangle to a PDF entirely in your browser.
PDF Highlighter
Enter a value to begin.
How to use this pdf highlighter
- Choose a PDF, enter the target page and percentage-based rectangle coordinates, select a colour and download the highlighted document.
- Check the inputs and preview, then use the primary action.
- Download, copy or use the result shown by the tool.
How the result is calculated
The browser draws one bounded translucent rectangle on the selected PDF page using coordinates measured from the top-left. It does not select text semantically, add comments, redact underlying content or authenticate the document.
Read the current pdf-lib PDF rectangle drawing documentation before submitting.
All calculation and transformation work happens in this browser tab. No entered value is sent to an Noler Tools application server.
Important limitations
Results are provided for convenience and should be checked independently before an important decision. A format or checksum result never authenticates an identity, document, account, licence, vehicle or registration.
Frequently asked questions
Is this pdf highlighter free?
Yes. It is free to use and does not require an account.
Does Noler Tools save my input?
No. The input and result remain in temporary browser memory and are not uploaded or saved by this site.