Free utilities
Extension maker tools
Practical helpers for manifests, store assets, compliance drafts, and go-to-market copy. Everything runs in your browser—no account required.
Build
Craft manifests, assets, and compliant packages.
- Build
Extension Size Calculator
Estimate package footprint against common store limits.
Open tool → - Build
Manifest.json Generator
Scaffold a Chrome MV3 manifest from a short form.
Open tool → - Build
Extension Permission Explainer
Plain-language notes for common Chrome permissions.
Open tool → - Build
Icon Generator / Validator
Check icon dimensions for store-ready sizes.
Open tool → - Build
MV2 to MV3 Converter
Starter rewrite hints from a Manifest V2 JSON paste.
Open tool →
Ship
Polish store listings and go live with confidence.
- Ship
Store Listing Optimizer
Score your listing copy against a practical rubric.
Open tool → - Ship
Screenshot Validator
Measure promo images against common aspect expectations.
Open tool → - Ship
Privacy Policy Generator
Draft a simple policy outline from your data practices.
Open tool → - Ship
Extension Submission Checklist
Track pre-submit tasks in the browser.
Open tool →
Grow
Positioning, keywords, and market context.
- Grow
Extension Pricing Calculator
Back-of-napkin revenue and unit math.
Open tool → - Grow
Extension Category Finder
Map keywords to directory categories.
Open tool → - Grow
Extension Keyword Research Tool
Extract terms and phrases from your draft listing.
Open tool → - Grow
Extension Competition Analyzer
Structure a lightweight competitive review.
Open tool →