Everyday Utilities Tools — 13 Free Browser-Based Utilities

Paste any HEX, RGB, or HSL value and see the converted formats plus a live color swatch. Copy any format with one click.

Generate one or many strong, random passwords in your browser using crypto-secure randomness. Pick length, character sets, exclude ambiguous characters, and copy each password with one click.

Convert numbers to Roman numerals (like 1994 → MCMXCIV) or Roman numerals back to numbers. Supports 1 through 3999 with full validation.

Fix text you typed before switching your keyboard layout by remapping every key to the layout you meant to use. Supports Arabic, Persian, Russian, Ukrainian, Hebrew, Greek, Turkish, AZERTY, QWERTZ, Spanish and QWERTY.

Percent-encode any string so it's safe to drop into a URL, or decode a percent-encoded string back to plain text. UTF-8 safe.

Convert CSS pixels to rem units and back with a custom base font size. Perfect for responsive design and accessibility work.

Generate cryptographically random UUID v4 identifiers (also called GUIDs). Create one at a time or a bulk batch and copy any value with one click.

Generate strong, memorable passphrases from random dictionary words — Diceware-style. Pick word count, separator, capitalization, and whether to add a number.

Measure a password's entropy in bits and see roughly how long an offline attacker would need to guess it. Analysis is local, so it is safe to test a real password.

Convert between Unix timestamps, ISO 8601 strings and readable dates in your local timezone or UTC. Seconds, milliseconds and microseconds are detected automatically.

Spell out any number in plain English, including decimals, ordinals like twenty-first, and currency wording for cheques and invoices. Handles values into the quadrillions.

Convert between metric and imperial units for length, weight, volume, temperature, speed, data and time, with a full comparison table for every unit. Currency uses static reference rates for rough estimates.

Paste a list and let the browser's cryptographic random generator pick winners, shuffle the order or split everyone into balanced teams. Perfect for giveaways, standups and classrooms.