Free online base converter that supports converting between bases 2–36 using BigInt for arbitrary-precision integers. All calculations run locally in your browser.
Perform everyday calculations and basic scientific functions directly in your browser with keyboard support and no data uploads.
Convert Unix timestamps to date/time and back in local time or UTC, with one-click copy for seconds and milliseconds and fully local processing in your browser.
Online timer with countdown and stopwatch modes plus quick presets, running entirely in your browser without sending any data.
Convert between IANA time zones and see UTC plus Unix timestamps entirely in your browser with no data uploads.
Convert units for length, mass, temperature, area, volume, speed and data size with adjustable precision, all computed locally in your browser.
Free online kinship calculator. Instantly figure out family relationship titles. Runs locally in your browser for privacy.
A fast decision helper that randomly selects from your options via list draw, wheel spin, coin flip, or dice roll. Includes algorithm selection, optional seed, and copyable results.
Generate random phone numbers by country with batch output, format options and one-click copy. Local-only for testing and demos.
Bulk-generate coupon codes with prefixes/suffixes and grouping separators. Local processing for privacy.
Browse and search emojis online, copy with one click and keep recent usage, all processed locally in your browser.