Web Calculator & Highlighter

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5.0 (

3 ratings

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Extension Tools 171 users

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Overview

Instantly calculate numbers you see online. Sum numbers, columns, rows, and highlight text. No more copy-pasting!

Transform Your Browser into a Smart Calculator & Annotation Tool! Web Calculator & Highlighter tool revolutionizes how you interact with numbers and information online. Stop juggling browser tabs and external apps—get instant calculations and powerful annotation directly on any webpage. Features: • Click numbers, rows, or columns for instant sums, averages, medians, and more. • Built-in calculator for custom equations and advanced functions. • Draw, annotate, or highlight text on webpages with emojis. • Dark mode for comfortable day/night use with a toggle. • Keyboard shortcuts for fast toggling and productivity. 💡 How it works: 1. Once added/installed, click the extension icon to open it. 2. Click numbers to get instant sums, averages, medians, and more. 3. Default mode is Freehand; switch to Row (key R) or Column (key C) mode anytime. 4. Use Custom Operation to enter and solve your own equations. 5. Select Draw mode to draw arrows, rectangles, annotate to highlight directly on the page. Privacy: Uses Google Analytics (GA4) for anonymized usage stats only. No personal data collected at all.

5 out of 5 3 ratings
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Details

Version

3.1
Updated

February 9, 2026
Flag concern
Offered by

resoluteacc
Size

47.01KiB
Languages

English (United States)
Developer

Email

resoluteacc@gmail.com
Non-trader

This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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Web Calculator & Highlighter has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy .

Web Calculator & Highlighter handles the following:

User activity

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

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