Convert Chrome Manifest V2 to V3 Online | Tool Launchpad

Convert Chrome Manifest V2 to V3 Online | Tool Launchpad

Manifest v2 to v3 Migrator & Converter

Convert Chrome extension manifest.json files instantly in your browser with zero server uploads. Secure, private, and client-side.

Chrome Extension Manifest v2 to v3 Migrator: Free Zero-Server Conversion Tool

Google Chrome's mandatory migration to Extension Manifest V3 requires developers to overhaul their legacy manifest.json configuration files. Moving from persistent background pages to service workers, updating browser actions, separating host permissions, and reformatting web-accessible resources can be tedious and prone to syntax errors.

The Browser Extension Manifest v2 to v3 Migrator is a 100% client-side utility built for developers who need to upgrade their extensions instantly. Operating entirely inside your browser using vanilla JavaScript, it parses your raw JSON structure locally without transmitting sensitive extension configurations or source code to an external server.

Key Features

  • Instant Service Worker Translation: Automatically converts legacy background.scripts or background.page arrays into a modern Manifest V3 service_worker entry while cleaning up deprecated persistent flags.
  • Action Property Refactoring: Instantly maps obsolete browser_action and page_action objects into the unified V3 action property.
  • Host Permission Separation: Automatically extracts URL match patterns (such as https://*.example.com/* or <all_urls>) out of the standard permissions array and places them into the required host_permissions array.
  • Web Accessible Resources Formatting: Upgrades older string arrays in web_accessible_resources to comply with the strict object-based standard requiring explicit matches arrays.
  • Zero-Server Privacy: Operates entirely client-side, ensuring your project metadata, internal extension names, and structural rules never leave your machine.

Frequently Asked Questions (FAQ)

What is the main difference between Manifest V2 and Manifest V3?

Manifest V3 replaces persistent background pages with ephemeral service workers, introduces stricter security protocols regarding remotely hosted code, separates host permissions from general API permissions, and updates resource accessibility definitions.

Does this tool upload my manifest file to a server?

No. All processing happens locally in your browser using client-side JavaScript. Your files and configuration data remain entirely private on your device.

How are legacy background scripts handled during conversion?

The tool automatically takes the first script defined in your legacy background.scripts array, assigns it as the V3 service_worker, and strips out obsolete properties like persistent: true.

What happens to my URL permissions?

Manifest V3 requires URL match patterns to be declared separately from API permissions. This tool scans your permissions array, isolates URL strings, and structures them cleanly under host_permissions.

Source Code & Full Ownership License

Get the complete, unminified source code package for this tool—including standalone HTML, Tailwind CSS layout, and conversion logic—ready for your website or portfolio.

$29 USD (Includes lifetime updates and commercial rights)
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