dev

Developer Tools

5 tools in this category

Base64 Encoder / Decoder

Encode and decode Base64, Base64URL, URL encoding, hex, and HTML entities. File support for images and documents. Runs client-side.

Check color contrast ratios for WCAG 2.2 AA and AAA compliance with APCA support, color blindness simulation, and auto-fix suggestions.

Visual cron expression builder with interactive field selectors, common presets, next execution preview, crontab line output, and shareable links.

Test regular expressions with real-time match highlighting, capture groups, replace mode, and common pattern presets. Runs in your browser.

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, ISO 8601, RFC 2822, and timezone comparison.