Build a Chrome Extension: 6 Free Tools

Generate Manifest V3 files, match patterns, permissions, CSP and blocking rules — free tools to ship an extension.

Chrome Extension Manifest V3 Generator

Generate a valid Chrome Extension manifest.json (MV3) with permissions and entry points.

Chrome Match Pattern Builder & Tester

Chrome Match Pattern Builder & Tester — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.

Chrome Extension Permissions Picker

Chrome Extension Permissions Picker — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.

Chrome declarativeNetRequest Rule Builder

Chrome declarativeNetRequest Rule Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.

Chrome Extension CSP Builder

Chrome Extension CSP Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.

Chrome Omnibox Keyword Config Builder

Chrome Omnibox Keyword Config Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.

Web Extension _locales messages.json Builder

Web Extension _locales messages.json Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.

VS Code Workspace Extensions Recommender

VS Code Workspace Extensions Recommender — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.

1,000+ more free tools

Every tool on ToolJolt is free, runs in your browser and needs no sign-up.