Workbench by Ivan
On-page developer tools: colors, SEO, ruler, cookies, and more. Local only.
Extension Metadata
Screenshots
About this extension
Workbench is a compact set of developer tools that run on the active page.
Tools:
- Color picker
- JSON formatter
- SEO audit
- Page ruler
- Password and UUID generators
- Element outlines
- Mobile / tablet width preview
- Cookie list for the current site
- HTML export of the page
How to test:
1. Open any https page
2. Open the Workbench popup
3. Click a tool (for example SEO audit or Color picker)
4. Use Cookie list or HTML export from the popup
Privacy:
Tools run locally in the browser. Workbench does not collect or transmit data.
Tools:
- Color picker
- JSON formatter
- SEO audit
- Page ruler
- Password and UUID generators
- Element outlines
- Mobile / tablet width preview
- Cookie list for the current site
- HTML export of the page
How to test:
1. Open any https page
2. Open the Workbench popup
3. Click a tool (for example SEO audit or Color picker)
4. Use Cookie list or HTML export from the popup
Privacy:
Tools run locally in the browser. Workbench does not collect or transmit data.
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Permissions and data
Required permissions:
- Download files and read and modify the browser’s download history
- Access your data for all websites
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.4.1
- Size
- 17.52 KB
- Last updated
- 5 days ago (Jul 11, 2026)
- Related Categories
- License
- MIT License
- Version History
- Add to collection