Developer tools that
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JSON Formatter & Validator

Format, beautify, validate, and minify JSON. Detects BigInt precision issues, duplicate keys, and JSONC comments.

JSON Diff

Compare two JSON objects side-by-side and highlight differences.

Base64 Encoder / Decoder

Encode or decode Base64 strings instantly. Supports standard and URL-safe variants.

URL Encoder / Decoder

Encode or decode URL components and query strings.

JWT Decoder

Decode and inspect JWT tokens. View header, payload, and signature without a secret.

UUID / ULID Generator

Generate RFC-4122 UUIDs (v1, v4, v5) and ULIDs instantly.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any string.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa.

Regex Tester

Test and debug regular expressions with real-time match highlighting.

Text / Code Diff

Compare two text blocks and highlight line-by-line differences.