Web dev tools
Small utilities for everyday web work: timestamps, colors with contrast ratios, crawler rules, cron schedules, and database connection strings — all computed in your browser.
Unix Timestamp Converter Online — Free & Instant
Convert Unix timestamps (seconds or milliseconds) to dates and back — ISO 8601, UTC, and relative time, instantly in your browser. Auto-detects units.
Color Converter Online — HEX, RGB, HSL, Contrast
Convert colors between HEX, RGB, and HSL with live WCAG contrast checks against white and black. Instant, free, and fully local in your browser.
Robots.txt Generator Online — Free, With AI Presets
Generate robots.txt with allow/disallow rules, crawl-delay, and sitemap directives — including one-click AI-crawler blocking. Free, instant, no signup.
Cron Expression Generator & Explainer — Free, In Your Browser
Write cron expressions and see a plain-English explanation, every field broken out, and the next six run times in your timezone. Presets, validation, aliases.
Database Connection String Parser & Builder — Free, In Your Browser
Parse and build postgres, mysql, mongodb, redis, and amqp connection URIs. Decode passwords, split hosts and query params, and export .env or Docker config.