Tools

Cron Expression Builder

Build, validate, and decode cron expressions with a visual editor and next-run preview.

JSON Validator

Validate, format, and minify JSON with syntax highlighting and error location.

Hash Generator

Compute SHA-256, SHA-512, SHA-1, and MD5 hashes of any text. Everything stays in your browser.

SQL Formatter

Format and beautify SQL queries with proper indentation and keyword casing.

Regex Tester

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

UUID Generator & Validator

Generate v4 and v7 UUIDs, validate format, and inspect version details. Client-side only.

Base64 Encoder / Decoder

Encode or decode Base64 and Base64-URL strings. Runs entirely in your browser.

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds with live clock.

CIDR / Subnet Calculator

Enter an IP address with CIDR notation to see network range, subnet mask, usable hosts, and more. Runs locally in your browser.

JWT Decoder

Paste a JSON Web Token to inspect its header, payload claims, and expiry. Everything runs locally in your browser.

X.509 Certificate Decoder

Paste a PEM-encoded certificate to inspect SANs, expiry, issuer chain, and more. Everything runs locally in your browser.