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计算器、转换器和指南 — 无需注册即可使用
67 tools • 6 languages • 100% free
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JSON Formatter & Validator
Format, minify, and validate JSON with tree view.
Base64 Encoder/Decoder
Encode and decode Base64 text and images.
URL Encoder/Decoder
Encode, decode URLs and parse query strings.
JWT Decoder
Decode JWT tokens, check expiration, and view claims.
Regex Tester
Test regular expressions with real-time highlighting.
Diff Checker
Compare two texts side-by-side with character-level diff.
UUID Generator
Generate UUID v4, v7, ULID with bulk and validation.
Hash Generator
Generate MD5, SHA-256, SHA-512 hashes with HMAC support.
Color Converter
Convert colors between HEX, RGB, HSL, CMYK with WCAG contrast check.
Timestamp Converter
Convert Unix timestamps to dates with timezone support.