Free tools

Tiny, free web tools, no sign-up, no install. They run right in your browser, and if you like one, there's usually an app for that.

• Riddle of the Day

  A new math riddle every day with three tries, a hint and the answer explained. Keep a streak.

• English Vocabulary Test

  Estimate your vocabulary from a short word sample, then find a study list to practise.

• Video Sizes by Platform

  Exact pixel sizes for Reels, TikTok, Shorts and the rest, with safe zones and a crop calculator.

• Year Progress Calculator

  See the percentage of the year elapsed, days left and a New Year countdown. Check any date.

• What Week Is It?

  Current ISO week number, ISO and US week for any date, and every week of the year.

• New Year Countdown

  Live days, hours, minutes and seconds to January 1 in your time zone.

• Aspect Ratio Calculator

  Get the ratio of any size, the missing width or height, and the crop or padding for 9:16, 4:5 or 16:9.

• Life in Weeks Calculator

  Enter your birthday and see your whole life as a grid of weeks.

• Color Lines 98 Online

  Play the Lines 98 ball puzzle in your browser. Move balls, line up colors, keep the board clear.

• Flags Quiz

  See a flag, guess the country. Ten rounds, instant scoring, dozens of countries.

• Photo Enhancer

  Auto-sharpen and brighten a photo in your browser, compare before/after, download. No upload.

• Picture Memory Game

  Flip the cards, match the pairs, learn the words. Four themes, race the clock.