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Regex Tester
Free online regex tester using PCRE syntax. Test match, find groups, and run replacement. Highlights matches in your test string with capture group breakdown.
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Unix Timestamp Converter
Free Unix timestamp converter. Translate Unix epoch seconds (or milliseconds) to ISO 8601, RFC 3339, and human-readable dates in any IANA timezone — and back.
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Number Base Converter
Free online number base converter. Convert between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Includes byte split and color hex preview.
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JSON Formatter
Free online JSON formatter, validator, and minifier. Pretty-print compact JSON with proper indentation, validate against RFC 8259 syntax, and minify back to a single line.
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Base64 Encoder / Decoder
Free Base64 encoder and decoder following IETF RFC 4648. Encode strings or files to Base64; decode Base64 back to text. Standard and URL-safe variants supported.
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Color Converter
Free color converter between HEX, RGB, HSL, HSV, and OKLCH. Pick a color or paste any format and see all CSS-compatible representations side by side with WCAG contrast.
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URL Encoder / Decoder
Free URL encoder and decoder following IETF RFC 3986. Encode special characters for query strings, decode percent-encoded URLs, and choose between encodeURI and encodeURIComponent.
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JWT Decoder
Free online JWT decoder. Inspect the header and payload of any JSON Web Token (RFC 7519). Identifies the signing algorithm and surfaces standard claims like exp, iat, sub.
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Hash Generator
Free online hash generator for MD5, SHA-1, SHA-256, SHA-512, SHA3-256, and SHA3-512. Hex or Base64 output. Produces all six hashes instantly side by side.
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Color Palette Generator
Free color palette generator. Pick a base HEX color and instantly get six harmony types: complementary, analogous, triadic, tetradic, split-complementary, and shades.
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Cron Expression Generator
Build or decode 5-field cron expressions used by Linux crontab, GitHub Actions, AWS EventBridge, Kubernetes CronJobs, and Jenkins. Includes plain-English explanation and next firing times.
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Lorem Ipsum Generator
Free Lorem ipsum placeholder text generator. Generate paragraphs, sentences, or words for design mockups, wireframes, and HTML templates with optional <p> tag wrapping.