Free developer tools

Browser-based utilities for JSON, JWT, SQL, YAML, cron, and more. Processing stays on your device unless a page says otherwise.

Developer Tools

Developer Tools

JSON Formatter

Pretty-print or minify JSON in your browser.

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Developer Tools

JSON Validator

Check JSON syntax without leaving the page.

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Developer Tools

JWT Decoder

Decode JWT header and payload locally.

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Developer Tools

Regex Tester

Test JavaScript regular expressions against sample text.

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Developer Tools

SQL Formatter

Indent SQL keywords for easier review.

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Web Tools

Web Tools

Timestamp Converter

Convert Unix time to readable dates and back.

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Converters

Converters

Base64 Encoder / Decoder

Encode or decode Base64 strings in the browser.

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Converters

YAML JSON Converter

Convert YAML to JSON and JSON to YAML locally.

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Generators

Generators

UUID Generator

Generate RFC 4122 version 4 UUIDs.

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Generators

Cron Generator

Build five-field cron expressions with a plain-English summary.

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