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Developer Tools – Free Online Code Formatter, Regex Tester & More

Essential developer utilities — code formatter, regex tester, URL encoder/decoder, JWT decoder. Fast, client-side, no installs needed.

🧹 Code Formatter & Regex

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✦ New

Code Formatter & Minifier

Format or minify JS, CSS, HTML, JSON & SQL instantly

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✦ New

Regex Tester

Test regex patterns with live match highlighting & groups

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🔐 Encoding & Token Tools

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✦ New

URL Encoder / Decoder

Encode & decode URLs and query strings instantly

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✦ New

JWT Decoder

Decode JWT tokens and inspect header, payload & claims

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Essential Developer Utilities — No Install Required

Stop switching between tabs to format JSON or test a regex. Our free developer tools let you format and minify code for JSON, HTML, CSS, JavaScript, and SQL in seconds, or test your regex patterns with live match highlighting and capture group display.

Need to encode a URL or decode a JWT token? All tools run client-side — nothing is uploaded to any server. Fast, private, and always free.

Frequently Asked Questions

Are all these developer tools free?

Yes. Every tool is 100% free with no account, API key, or subscription needed.

Is my code or data sent to a server?

No. All tools run 100% in your browser. Your code, regex patterns, URLs, and JWT tokens never leave your device.

Which languages does the code formatter support?

JSON, HTML, CSS, JavaScript, and SQL — both beautify and minify modes.

Does the JWT decoder verify signatures?

No. It only decodes the base64url-encoded header and payload. Signature verification requires a secret/private key and is intentionally not supported for security reasons.

What regex syntax does the regex tester support?

JavaScript (ECMAScript) regex syntax with full flag support: g (global), i (case-insensitive), m (multiline), and s (dotAll).