Free Developer Tools
A collection of lightweight, browser-based utilities to speed up your daily development workflow. 100% free, forever.
JSON Formatter & Validator
Pretty-print or minify JSON strings and validate their syntax instantly.
Cron Command Builder
Build full crontab lines with logging, error handling, and retry logic.
Cron Generator
Build, validate, and understand cron expressions with an interactive visual generator.
Cron Cheat Sheet
A quick, interactive visual reference for cron syntax. Perfect for fast syntax reminders.
Cron Validator
Validate and decode any cron string instantly with human-readable descriptions.
SLA Calculator
Convert uptime percentages into actionable downtime metrics (daily, weekly, monthly).
App Pinger
Keep your free-tier apps awake with simple keep-alive scripts for Heroku and Render.
Bash Health Check Generator
Generate scripts to monitor disk and processes that integrate with CronRabbit.
Base64 Encoder/Decoder
Easily encode and decode Base64 strings for auth headers, webhooks, or binary data.
Regex Tester (Minimal)
Test regular expressions against log snippets. Crucial for custom log parsing rules.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back again instantly.