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 and parse PostgreSQL connection strings. Detects your database provider (Supabase, Neon, AWS RDS, Railway & 10 more), parses all components, and checks for common issues.
PostgreSQLDatabaseValidation
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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.
CronSchedulingDevOps
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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.
StripeAPI KeysSecurity
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All tools are free to use with no sign-up. Built by Codeless Sync — the no-code platform for syncing API data to PostgreSQL.