Productivity
Do quick sums and convert units, add or remove VAT, change currencies, and see how savings grow and what a mortgage costs. Work out your hourly rate, keep a to-do list, focus with the Pomodoro timer, and count down to the moments that matter.
A free online calculator with a basic and a scientific mode: trigonometry, logarithms, powers, roots, factorials, memory and history, with the correct order of operations.
A free online unit converter for length, weight, temperature, speed, area, volume, time, pressure, energy and computer data - bytes to gigabytes and GB to GiB.
A free online VAT calculator: add or remove VAT with rates for the Netherlands, Belgium, Germany, France, the UK and more, and print a simple invoice overview.
A free online currency converter with live exchange rates: convert euros, pounds, dollars, yen and more than 150 other currencies, with favourites and an offline fallback.
A free compound interest calculator with a clear growth chart: starting amount, monthly or yearly contributions, compounding frequency, inflation, a year-by-year table and CSV export.
A free mortgage and loan calculator: monthly payment, total interest and payoff date for annuity, linear or interest-only repayment, with a chart, an amortisation table and CSV export.
A free hourly rate calculator for freelancers and employees: hourly rate to estimated net monthly income, target income to required rate, and salary to hourly wage, with a breakdown chart.
A free, minimalist to-do list: add tasks with Enter, tick them off, filter by status, tag and priority, sort by due date and keep several lists, all stored in your browser.
A free Pomodoro timer: 25 minutes of focus, 5-minute breaks and a long break after four sessions, with a progress ring, sound signals, notifications and daily stats.
A free online countdown timer: count down live to an event, product launch or the New Year in any time zone, with flip or clean digits, share links, embed code and confetti.
A free online Kanban board: drag cards between To do, In progress and Done, add your own columns, WIP limits, colour labels, due dates and priorities. Saved in your browser.
A free online habit tracker: add daily or weekly habits, tick off days in a week or month grid, and watch streaks, completion and a heatmap. Saved in your browser.
A free online Eisenhower matrix: sort tasks into Do first, Schedule, Delegate and Eliminate, drag them between quadrants, add due dates and notes. Saved in your browser.
A free meeting cost calculator: add roles with hourly rates or salaries, start the live ticker and see what the meeting costs per minute. Log past meetings and copy a summary.
A free date calculator: count the days between two dates, add or subtract months and days, count working days with public holidays, find an exact age and look up the ISO week number.
A free world clock: compare the time in cities around the world with analog and digital clocks, UTC offsets, day and night and daylight saving time, and plan meetings across time zones.
A free decision wheel: spin a wheel of your own options with weights and colors, get a fair random result, keep a spin history and save lists such as yes or no, dinner or numbers 1 to 10.
A free BMI calculator for adults: body mass index from height and weight in metric or imperial units, with the WHO category, your healthy weight range and a clear scale.
Free word and character counter: words, characters with and without spaces, sentences, paragraphs, unique words, reading and speaking time, keyword density and limits for X posts, SMS, meta descriptions and titles. Works for every language.
A free text case converter: UPPERCASE, lowercase, Title Case with language rules, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case and URL slugs, plus cleanup for spaces, line breaks, bullets and emojis.
A free online Markdown editor with a live preview: split view with synchronized scrolling, GitHub style tables and task lists, code highlighting, a formatting toolbar, focus mode, word count and reading time, autosave and .md or .html download.
A free lorem ipsum generator: placeholder text as paragraphs, sentences, words, list items or bytes, in classic Latin, the Cicero original or themed word sets, with HTML output, headings and a reproducible seed.
A free JSON formatter and validator: beautify or minify JSON, find the exact line and column of an error, sort keys, browse a collapsible tree, copy paths and convert arrays to CSV, all in your browser.
Free password generator: strong random passwords and passphrases from crypto.getRandomValues, with length, character sets, look-alike exclusion, bulk generate, entropy, strength meter and crack time. Nothing is saved or sent.
Free QR code generator for URLs, text, Wi-Fi, vCard contacts, email, phone, SMS and locations. Custom colors with contrast check, quiet zone, rounded or dot modules, center logo, PNG and SVG download. No sign-up, nothing uploaded.
A free aspect ratio calculator: simplified ratio and decimal ratio from width and height, the nearest common ratio, resize with a locked ratio and rounding for video, presets for screens, social media and print, and fit or fill with letterbox bars.