Developer Tools — Free Online Tools

Formatters, encoders, generators and converters for everyday coding.

7 free tools — all running privately in your browser

QR Code Generator

Generate QR codes from any text, URL or contact and download them as images.

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UUID Generator

Generate unique UUID v4 identifiers for apps, databases and testing.

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JSON Formatter

Format, minify and validate JSON online — pretty-print with syntax checking in your browser.

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Base64 Encoder Decoder

Encode text to Base64 or decode Base64 strings back to plain text — UTF-8 safe, instant, private.

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URL Encoder Decoder

Encode or decode URL strings and query parameters instantly — percent-encoding made simple.

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HTML Encoder Decoder

Encode or decode HTML entities instantly — escape special characters for safe web output.

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JWT Decoder

Decode JWT header and payload online — inspect JSON Web Tokens instantly in your browser.

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