Free Developer Tools

Fast, free, and privacy-first. Everything runs in your browser — no signup, no tracking, no bloat.

Cron Expression Generator

Build and validate cron expressions visually. Get human-readable output and preview the next 5 scheduled run times.

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JWT Decoder & Inspector

Decode JWT tokens and inspect the header, payload, signature, and expiry status — entirely client-side.

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Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Live current timestamp, local time, UTC, and relative output.

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YAML ↔ JSON Converter

Convert YAML to JSON or JSON to YAML instantly. Handles nested structures, arrays, and multiline strings.

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SQL Formatter & Beautifier

Format and beautify SQL queries. Supports MySQL, PostgreSQL, SQLite, T-SQL, and BigQuery with configurable options.

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Why Stackiox?

Stackiox is a collection of developer utilities built for speed and simplicity. Every tool runs entirely in your browser using plain HTML, CSS, and JavaScript — no frameworks, no servers, no data collection. Your code, tokens, and queries never leave your machine.

Each tool is designed around a single job: do it well, do it fast, and get out of your way. No ads cluttering the interface, no account required, no rate limits. Bookmark the tools you use daily and they load instantly, even offline if cached.

Built for software engineers, DevOps practitioners, and anyone who works with APIs, configuration files, databases, or scheduled jobs. All tools are free to use and will remain free.