# Developer Tools

Canonical: https://herebetools.com/topics/developer

Browse free developer tools and references on Here Be Tools. Choose a tool to see its capabilities and use it in your browser.

- [Chmod Calculator](https://herebetools.com/chmod): Build Unix file permission masks visually
- [Cron Parser](https://herebetools.com/cron): Parse cron expressions to plain English
- [GraphQL Formatter](https://herebetools.com/graphql-format): Format, minify and analyze GraphQL queries
- [Hash Generator](https://herebetools.com/hash): Generate SHA-1/256/384/512 hashes
- [JS Playground](https://herebetools.com/js-playground): Run and lint JavaScript in the browser with live console output
- [Number Base](https://herebetools.com/number-base): Convert between decimal, hex, binary, octal
- [PEM Decoder](https://herebetools.com/pem): Decode X.509 certificates from PEM format
- [Regex Tester](https://herebetools.com/regex): Test and debug regular expressions
- [Robots.txt](https://herebetools.com/robots-txt): Generate and analyze robots.txt files
- [SQL Formatter](https://herebetools.com/sql-format): Format and beautify SQL queries
- [Timestamp](https://herebetools.com/timestamp): Convert Unix timestamps to human-readable dates with timezone support
- [Unicode Inspector](https://herebetools.com/unicode): Analyze Unicode characters and code points
- [UUID Generator](https://herebetools.com/uuid): Generate v4 UUIDs in bulk and copy them instantly

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