Utilities
Essential developer utilities for everyday tasks. Decode tokens, generate IDs, hash strings, test regex patterns, and more. Everything runs locally in your browser.
Decode, encode and verify JSON Web Tokens.
Generate UUID v1, v4, v5, and v7 in bulk.
Test and debug regular expressions live.
Convert Unix timestamps and ISO dates.
Generate MD5 checksums for any text.
Generate SHA-256 cryptographic hashes.
Generate SHA-1 hashes online.
Generate SHA-512 hashes online.
Generate HMAC-SHA256/512 message authentication codes.
Generate secure random passwords and passphrases.
Convert between hex, RGB, HSL and HSV.
Convert between decimal, binary, octal and hex.
Parse and explain cron expressions in plain English.
Render Markdown with syntax highlighting live.
Compare two text blocks and highlight differences.
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About SyntaxMaster Utilities
From JWT decoding to UUID generation, regex testing to hash generation — these tools cover the most common developer tasks. All processing happens locally so your tokens, passwords, and data never leave your device.