What Web Developer is
The extension groups controls for CSS, forms, images, cookies, resizing, outlines, and source inspection into a long-running toolbar. It favors breadth and direct toggles over polished diagnostics.
Feature coverage
- CSS and layout toggles
- Form, image, and cookie tools
- Viewport and outline utilities
What stands out
- Very broad utility set
- Large established user base
- Fast one-off page manipulation
Tradeoffs to know
- No store update since 2024
- Interface reflects its long history
- Many features overlap built-in DevTools
Permissions and privacy
Page access
Developer extensions can inspect the active page, its markup, or application state. Use a separate browser profile when debugging sensitive production or customer data.
Data notes
Inspected source, network details, or application state may be sensitive. Check telemetry defaults and avoid exposing secrets while an extension has access to development tools.
Pricing
Free. Pricing and plan limits change more often than store metadata, so use the linked developer page as the final check before subscribing.
Alternatives
Sources
We used the official Chrome Web Store listing and first-party developer material. Public metrics can change after the fact-check date.
- Chrome Web Store listing
Rating, rating count, public users, version, update date, and publisher disclosures verified August 20, 2026.
- Web Developer product documentation
First-party product, feature, support, or project documentation used for workflow context.
- Extension Reviewer methodology
How public claims, permissions, evidence, and tradeoffs are reviewed.