Free Developer Utilities
Free developer tools, no signup required. Fast, client-side utilities that run instantly in your browser without sending data to a server.
JSON Formatter
Format, validate, and minify JSON data instantly. Supports tree view for nested objects.
Regex Tester
Test regular expressions with live highlighting and plain-English explanations.
Cron Builder
Visually build or parse cron schedule expressions. See the next 5 execution times.
Contrast Checker
Check WCAG color contrast ratios with live previews and alternative color suggestions.
API Tester
Send HTTP requests directly from your browser to test endpoints and inspect responses.
.env to YAML
Convert .env files to Docker Compose environment blocks and Kubernetes ConfigMaps/Secrets, with automatic sensitive-key detection.