Free Utilities
Free Online Tools
300+ free tools — no signup, no upload, works right in your browser.
Most Popular Tools
Cron Expression Builder
Visual cron expression builder with next-run preview, code snippets, natural language input, and presets. 100% client-side.
Ping Tool
Measure HTTP latency to any website or server. Tests round-trip time with statistics including min, max, average, and packet loss.
Code Diff / Compare
Compare two code snippets side by side. Line-level and character-level diff, unified/split view. 100% client-side.
Markdown Editor
Write Markdown with live preview, GitHub-Flavored Markdown support, toolbar formatting, export to .md or HTML, and dark mode.
WHOIS Lookup
Look up WHOIS registration data for any domain. View registrar, creation date, expiry date, name servers, and registrant information.
YAML to JSON Converter
Convert between YAML and JSON instantly. Bidirectional conversion, auto-detect format, Kubernetes manifest detection. 100% client-side.
URL Encoder & Decoder
Encode or decode URLs and query parameters instantly. Supports encodeURIComponent and encodeURI modes.
Port Checker
Check if a specific port is open on any server or IP address. Scan common ports like HTTP, HTTPS, SSH, FTP, and database ports.
Speed Test
Test your internet connection speed. Measures download speed in Mbps, latency, and jitter with a visual speed gauge.
HTML Beautifier
Format, minify, and clean HTML code with customizable indentation, inline CSS/JS support, HTML validation, JSX conversion, and one-click copy.