Free Developer Tools
Useful tools for developers — all free, instant, and 100% client-side. No sign-up required. Your data never leaves your browser.
PostgreSQL Connection String Validator
Validate, parse, and troubleshoot PostgreSQL connection strings. Detects your provider (Supabase, Neon, AWS RDS, Railway & 10 more), classifies pooler vs direct, and lists fixes for common connection errors.
Cron Expression Generator
Build cron schedules visually or parse existing expressions. Get human-readable descriptions, see parsed fields, and preview the next 5 scheduled run times in UTC.
Stripe API Key Validator
Validate Stripe API key format, detect key type (secret, publishable, restricted, webhook), check live vs test mode, and get security recommendations.
All tools are free to use with no sign-up. Built by Codeless Sync — the no-code platform for syncing API data to PostgreSQL.