Text Reading time calculator Paste text and estimate reading time with a custom words-per-minute speed.
Text Character counter Paste text and count characters, words, lines, paragraphs, and UTF-8 bytes instantly.
Daily life Date calculator Calculate date differences, business days, age, countdowns, and add or subtract days.
Daily life Countdown calculator Create a live countdown to any date and time directly in your browser.
Daily life BMI calculator Calculate body mass index with metric or imperial units and see the basic BMI category.
Daily life Timestamp converter Convert Unix timestamps to dates and local dates back to Unix time in your browser.
Developer Base64 encoder decoder Encode text to Base64 or decode Base64 back to UTF-8 text in your browser.
Developer Regex tester Test JavaScript regular expressions, flags, matches, capture groups, and replacements in your browser.
Text Online text editor Write, format, open local text files, and export TXT, Markdown, or HTML in your browser.
Business Online spreadsheet editor Edit a simple spreadsheet, open CSV files, use basic formulas, and download CSV locally.
Developer UUID / ULID generator Generate UUID v4, ULID, NanoID, or hex tokens directly in your browser.
Developer Secure password generator Generate strong random passwords in your browser with Web Crypto.
Business QR code generator Create QR codes for URLs, text, email, phone, WhatsApp, and Wi-Fi in your browser.
Business WhatsApp link generator Create a wa.me link with a phone number and optional message in your browser.
Finance Loan payment estimator Estimate monthly loan payments, total interest, and total paid in your browser.
Finance Amortization schedule Estimate a month-by-month loan amortization table with principal, interest, balance, and optional extra payments.
Finance Compound interest calculator Estimate compound growth with a starting amount, rate, time, and monthly contributions.
Math Percentage difference Compare two values and see percentage change, absolute change, and percentage difference.
Math Rule of three calculator Solve direct and inverse rule of three problems with the formula and step-by-step work.
Daily life Unit converter Convert common length, weight, volume, and temperature units in your browser.
Business Waterfall chart Build a stepped waterfall chart with change bars and total bars, then copy it as a JPG.
Design Photo editor Adjust, crop, and resize photos in your browser with local JPG, PNG, and WebP export.
Math Equation plotter Plot up to three polynomial, trigonometric, or logarithmic equations on the same chart.
Math Derivative calculator Find symbolic derivatives and optional point estimates directly in your browser.
Study Electronics basics Use one page for Ohm's law, LED resistors, voltage dividers, PWM, dB, ADC, DAC, and resistor basics.
Design Text color palette Test one text color over two background colors and preview graphic-style text layouts.