Web Calculator & Highlighter
Instantly calculate numbers you see online. Sum numbers, columns, rows, and highlight text. No more copy-pasting!
As of June 2026, Web Calculator & Highlighter has 202 users and a 5.00/5 rating from 3 reviews in the Productivity category.
Usersup 102.0 percent+102.0%
202
202
Ratingno change0%
5.00
3 reviews
Reviewsno change0%
3
Version
3.1
Manifest V3
History
8 snapshotsTracking since Apr 6, 2026.
View as table
| Date | Users | Rating | Reviews | Version |
|---|---|---|---|---|
| Apr 6, 2026 | 100 | 5.00 | 3 | 3.1 |
| Apr 18, 2026 | 101 | 5.00 | 3 | 3.1 |
| Apr 23, 2026 | 127 | 5.00 | 3 | 3.1 |
| Apr 28, 2026 | 128 | 5.00 | 3 | 3.1 |
| May 8, 2026 | 142 | 5.00 | 3 | 3.1 |
| May 12, 2026 | 160 | 5.00 | 3 | 3.1 |
| May 20, 2026 | 164 | 5.00 | 3 | 3.1 |
| Jun 8, 2026 | 181 | 5.00 | 3 | 3.1 |
| Now | 202 | 5.00 | 3 | 3.1 |
Permissions & access
- Permissions
- activeTabscripting
- Host access
- None declared
Screenshots
About
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.
Technical
- Version
- 3.1
- Manifest
- V3
- Size
- 47.01KiB
- Min Chrome
- 88
- Languages
- 1
- Featured
- Yes
Metadata
- ID
- jjlniiflpendohmnmfpdlcmicinejmhi
- Developer ID
- u1e8bc13e5f38747511bf052b67c7e999
- Developer Email
- [email protected]
- Created
- Sep 24, 2025
- Last Updated (Store)
- Feb 9, 2026
- Last Scraped
- Jun 8, 2026
- Website
- —
- Support URL
- —
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