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Numbers are more fun at the park.
137 calculators, converters, PDF and image tools and games. No sign-up, no queue, and nothing you bring ever leaves your device.
Crowd favourites
See all 137 →- Percentage CalculatorWhat is X% of Y, X is what % of Y, percentage change, increase or decrease by a percent, value before a change and percentage points – seven cards that work at once.
- Loan CalculatorMonthly payment, total interest and a full amortization schedule for any fixed-rate loan in any currency. Add fees for the APR, or an extra payment to see what you save.
- BMI CalculatorCalculate your BMI from height and weight (metric or imperial) with the WHO adult category, the healthy weight range for your height and BMI prime.
- How Many Days Until…Live countdown to any date in days, hours, minutes and seconds, with working days, weeks and presets for Christmas, New Year’s Eve, Valentine’s Day and Halloween.
- PDF MergerCombine two or more PDF files into one document in your browser. Reorder files, pick page ranges per file and download the merged PDF – nothing is uploaded.
- Image CropperCrop JPG, PNG and WebP images in your browser: drag the box or type exact pixels, lock a ratio such as 1:1, 4:3, 3:2 or 16:9, rotate by 90° and save as JPEG, PNG or WebP.
- QR Code GeneratorMake QR codes for links, text, Wi-Fi, email, phone numbers, SMS and contact cards. Pick size, error correction and colours; download PNG or SVG, all in your browser.
- Password GeneratorCreate strong random passwords of 4–128 characters or multi-word passphrases, with character sets, exclusions and an exact entropy figure in bits, all in your browser.
- Temperature ConverterConvert between °C, °F, K and °R with the formula shown step by step (°F = °C × 9/5 + 32), a reference table from −40 to 250 °C and an absolute-zero check.
- Video to GIF ConverterTurn part of a video into an animated GIF in your browser: set the range, frame rate, width, speed, reverse or boomerang, quality and loop count, with a two-pass palette.
- SudokuPlay Sudoku online: four levels, every puzzle has exactly one solution. Pencil marks, hints, check, undo, keyboard input, timer and best times saved in your browser.
- Dice RollerRoll d4, d6, d8, d10, d12, d20, d100 or custom dice, several at once with a modifier, keep-highest or drop-lowest rules, a roll history and the exact odds of each total.
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