Base64 Encode / Decode
Encode and decode Base64 text entirely in your browser (UTF-8).
All Tools
Browser-only SEO tools — no external APIs required.
Color Picker / Contrast Checker
Compute WCAG 2.x contrast ratio between two colors — fully…
Cron Expression Explainer
Explain a 5- or 6-field cron expression and estimate upcoming…
Hash Generator
MD5 (pure JS) plus SHA-1 / SHA-256 via Web Crypto…
Color & MAC Helpers
Convert HEX↔RGB with CMYK/HSV notes, and generate/parse MAC addresses locally.
HTML Encode / Decode
Convert special characters to HTML entities and back.
IP Address Parser
Parse a pasted IPv4/IPv6 address — no WHOIS or GeoIP…
JS / CSS Minify & Beautify
Basic minify or beautify for JavaScript and CSS (heuristic, not…
JSON Formatter / Validator
Validate, pretty-print, or minify JSON in the browser.
Password Generator
Generate strong passwords and measure strength locally.
QR Code Generator
Generate a QR code from text or a URL locally…
Timestamp ↔ Date Converter
Convert between Unix timestamps and human dates (local / UTC).
URL Encode / Decode
encodeURIComponent / decodeURIComponent entirely in the browser.
User-Agent Parser
Extract browser, OS, and device from a pasted UA string…
UUID Generator
Generate random UUID v4 identifiers locally.