Local-First Utilities Zero Cloud Telemetry
Flutter Developer Tools
Specialized utilities built for everyday Flutter engineering. All parsing, formatting, conversions, and comparisons run entirely in your browser without transmitting your data anywhere.
JSON
Launch →
JSON Formatter
Format, minify, and schema-validate Flutter widget JSON
/tools/json
Open Tool
Colors
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Color Converter
Convert Hex/RGB/ARGB to Flutter Color(0xAARRGGBB)
/tools/colors
Open Tool
API Diff
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API Response Inspector
Path-based response diffing with type, null, and numeric analysis
/tools/api-inspector
Open Tool
Themes
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Flutter Theme Builder
Normalized ThemeData & ColorScheme builder with live preview
/tools/theme-builder
Open Tool
L10n
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Localization Helper
ARB bundle, placeholder, and ICU syntax validation
/tools/localization
Open Tool
Local Processing Guarantee: All tool inputs, pasted JSON snippets, color selections, and comparison files remain strictly local in browser memory. No telemetry or server-side compiler is invoked.