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Regex Tester & Validator
Test and validate regular expressions with real-time matching. Supports flags, groups, and common patterns.
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Common patterns:
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JSON Formatter & Validator
Format, validate, and beautify JSON data instantly. Paste messy JSON and get clean, indented output.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text. Fast, free, and runs entirely in your browser.
URL Encoder / Decoder
Encode or decode URLs with percent-encoding. Handles query strings, special characters, and Unicode.
HTML Entities Encoder / Decoder
Encode special characters to HTML entities or decode HTML entities back to text. Essential for web developers.