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Code Generators

JSON formatters, UUID generators, base64 encoders, regex testers and dev utilities.

B64

Base64 Encoder/Decoder — Encode & Decode Base64 Online

Encode text to Base64 or decode Base64 back to text instantly. Supports full UTF-8, auto-detects mode, and runs entirely in your browser.
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Epoch Converter — Unix Timestamp to Date & Back

Convert Unix epoch timestamps to human-readable dates and vice versa. Live clock, timezone selector, millisecond support, and instant bidirectional conversion.
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Hash Generator — MD5, SHA-1, SHA-256, SHA-512 Online

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text instantly. Uses the Web Crypto API for accurate, standards-compliant output. Copy any hash with one click.
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JSON Formatter & Validator — Pretty Print JSON Online

Format, minify and validate JSON instantly. Pretty print with 2-space, 4-space or tab indentation, spot errors with line numbers, and copy clean output in one click.
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Regex Tester — Test Regular Expressions Online

Test regular expressions against any text in real time. See highlighted matches, capture groups, match count and flag options — all running in your browser.
IV

Roman Numeral Converter — Numbers to Roman & Back

Convert numbers to Roman numerals or Roman numerals to numbers instantly. Bidirectional, validates input, supports 1 to 3999, and shows the conversion breakdown.
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URL Encoder/Decoder — Encode & Decode URLs Online

Encode special characters for safe use in URLs or decode percent-encoded strings back to readable text. Uses encodeURIComponent and decodeURIComponent for standards-compliant output.
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UUID Generator — Generate v4 UUIDs Online

Generate cryptographically random UUID v4 identifiers instantly. Bulk generate up to 100, toggle uppercase or lowercase, and copy individual or all UUIDs with one click.

Frequently Asked Questions

Is my code/data secure? ▾

Yes. Every tool runs entirely in your browser. Your code, JSON, and data never leave your machine — nothing is sent to any server.

Do these tools work offline? ▾

Once loaded, most tools work without an internet connection since all processing happens client-side.

Are these tools accurate? ▾

Yes. We use the same standard libraries and algorithms that power production software — not custom implementations.

Can I use these for production work? ▾

Absolutely. These are the same operations you'd run in a terminal, just with a visual interface. The outputs are identical.