Guides & how-tos
Short, practical guides on the everyday tasks our free tools help with. No fluff, no sign-ups.
How to Count Words in an Essay (Fast, Free, No Sign-Up)
Learn three quick ways to count words in any essay or article, plus the easiest free online word counter that also tracks characters, sentences, and reading time.
How to Create a Strong Password in 2026 (With a Free Generator)
A practical 2026 guide to creating strong, memorable, and unique passwords — plus a free password generator that builds secure passwords locally in your browser.
How to Create a Wi-Fi QR Code (Free, No Apps to Install)
Step-by-step guide to creating a Wi-Fi QR code guests can scan to connect instantly — no app required. Includes the exact WIFI: string format and a free QR generator.
How to Format and Validate JSON (Free Online Formatter)
Learn how to format, beautify, and validate JSON in your browser. Common JSON errors explained, plus a free formatter that pretty-prints and minifies instantly.
Base64 Encoding Explained (With a Free Online Encoder/Decoder)
What Base64 is, when to use it, when not to, and how to encode or decode any text in your browser with a free Base64 tool.
How to Calculate BMI (Formula, Categories, Free Calculator)
Learn the BMI formula in metric and imperial units, what each BMI category means, and use a free calculator for an instant result.
How to Calculate Loan Payments (Formula + Free Calculator)
Understand the monthly loan payment formula, how interest compounds, and use a free calculator to see your monthly payment, total interest, and total cost.
How to Convert Celsius to Fahrenheit (Formula + Free Converter)
The exact Celsius-to-Fahrenheit formula, a quick mental-math shortcut, and a free converter that handles Celsius, Fahrenheit, and Kelvin instantly.
How to Create SEO-Friendly URL Slugs (Rules + Free Slug Generator)
Best practices for SEO-friendly URL slugs, common mistakes to avoid, and a free slug generator that handles accents, special characters, and casing.
How to Decode a JWT Token (Safely, In Your Browser)
Learn what a JWT is, how its header, payload, and signature work, and how to decode one safely in your browser with a free JWT decoder.
Free JSON Formatter — No Sign-Up, Runs in Your Browser
Format, validate, and minify JSON without creating an account. 100% browser-based so your data never leaves your device.
How to Convert Pixels to REM in CSS (Free Calculator)
Convert px to rem (and back) with the standard 16px base, plus em, pt, and pc. Free, instant, no sign-up.
Free Online Mortgage Calculator (No Email, No Signup)
Calculate monthly mortgage payments, total interest, and total paid over any term — without handing over your email.
Best Free QR Code Generator — No Watermark, No Signup
Make QR codes for URLs, Wi-Fi, text, and contact info without watermarks, expiration, or accounts.
Convert CSV to JSON Online (Free, No File Upload)
Paste CSV data and get a clean JSON array instantly. Browser-only — your file never leaves your device.
Free Bold Text Generator for Instagram, Twitter & TikTok Bios
Make bold Unicode text that works in any social bio — Instagram, Twitter/X, TikTok, LinkedIn. No app, no signup.
Compound Interest Calculator (Free, No Signup Required)
See how your savings grow with monthly compounding and any contribution schedule. No login, no email, instant results.
Free Markdown Table Generator (Paste CSV, Get Markdown)
Turn CSV or TSV data into a clean Markdown table for GitHub, Notion, or your docs site. No signup.
Best Free Password Generator (No Tracking, Local Only)
Generate strong passwords locally in your browser. No server, no tracking, no signup — the password never leaves your device.
Convert Mbps to MB/s (Free Bandwidth Calculator)
Quick converter between Mbps, Gbps, MB/s, and KB/s. Free, no signup, instant.
Free ROI Calculator (Return on Investment, No Signup)
Calculate ROI percentage and profit on any investment in seconds. Free, browser-based, no login.
Celsius to Fahrenheit Formula (Plus a Free Converter)
The simple formula to convert °C to °F (and back), with a free instant converter that also handles Kelvin.
Free Sales Tax Calculator (Works for Any Rate)
Calculate sales tax for any rate, in any state or country. No signup, no email, instant results.
Free GPA Calculator for College (No Signup, Instant)
Calculate your GPA from grades and credit hours on a 4.0 scale. No account, no email, runs in your browser.
Text to Binary Converter (Free, No Signup)
Convert any text to 8-bit binary code instantly. Free, browser-based, no account required.
Random MAC Address Generator (Free, for Testing)
Generate random valid MAC addresses for development and testing. Free, no signup, batch generation.
Free Aspect Ratio Calculator (Resize Without Distortion)
Calculate aspect ratios and resize images or videos while preserving proportions. Free, no signup.
Electricity Cost Calculator for Any Appliance
Estimate what an appliance costs to run per day, month, or year. Free, no signup, works with any kWh rate.
Online Coin Flip (Free, No App Required)
Flip a virtual coin online — instant, fair, no install. Works on mobile and desktop.
Convert JSON to YAML Online (Free, No Upload)
Convert JSON config to YAML in one click. Browser-only, no file upload, no signup.
Pythagorean Theorem Calculator (Free, Instant)
Calculate the hypotenuse of any right triangle using a² + b² = c². Free, no signup.
Pounds to Kilograms Converter (Free, Instant)
Convert lbs to kg (and back) in one click. Free, no signup, works on mobile.
Free URL Parser (Break Down Any URL Online)
Parse any URL into protocol, host, path, query string, and hash. Free, no signup.
Generate Test Credit Card Numbers (Luhn-Valid, Free)
Generate test credit card numbers that pass Luhn validation, for use in sandbox environments. Not real cards.
Text to Morse Code Translator (Free, Instant)
Convert text to Morse code (or decode Morse to text) instantly. Free, no signup, no app.
Cooking Measurement Converter (Cups, Tsp, Ml)
Convert between cups, tablespoons, teaspoons, ml, and fluid ounces. Free, no signup, mobile-friendly.
Typing Speed Calculator (Free WPM, No Signup)
Calculate your words-per-minute from words typed and seconds elapsed. Free, no account.
Convert RGB to HEX (Free Color Converter)
Convert RGB to HEX (and HSL) instantly. Free, browser-based, no signup.
Zalgo Text Generator (Free, Adjustable Intensity)
Generate glitchy Zalgo text with stacked combining marks. Free, no signup, copy-paste anywhere.
Test IBAN Generator (Free, For Sandbox Use)
Generate test IBAN numbers for development and QA. Not real bank accounts.
Free Online HTML Minifier (No Upload, No Signup)
Minify HTML to reduce file size and speed up your site. Browser-only, no signup.
Convert Bytes to MB and GB (Free Data Size Converter)
Convert bytes, KB, MB, GB, TB — plus binary KiB/MiB/GiB. Free, no signup.
Grade Calculator (Points to Letter Grade, Free)
Convert points earned into a percentage and letter grade instantly. Free, no signup.
Random Username Generator (Free, Unique Ideas)
Generate random unique usernames for any account. Free, no signup, 10 ideas per click.
Ratio Calculator (Free, Simplify & Scale)
Simplify ratios to their lowest terms and scale them up or down. Free, no signup.
Convert Degrees to Radians (Free Online Calculator)
Convert between degrees, radians, gradians, and turns. Free, no signup, instant.
Free VAT Calculator (UK & EU, Add or Remove)
Add or remove VAT from any net or gross price for UK and EU rates. Free, no signup.
Convert Hz to MHz and GHz (Free Frequency Converter)
Convert frequency between Hz, kHz, MHz, GHz, and RPM. Free, no signup.
Joules to kWh Converter (Free Energy Calculator)
Convert joules, kilojoules, calories, kWh, and BTU. Free, instant, no signup.
PSI to Bar Converter (Free Pressure Calculator)
Convert pressure between PSI, bar, kPa, atm, and mmHg. Free, no signup.
Shuffle Lines Online (Free, Random Order)
Randomly shuffle the order of any list of lines. Free, no signup, runs in your browser.
Newtons to Pound-Force Converter (Free)
Convert force between Newtons, kN, pound-force, and kilogram-force. Free, no signup.
Convert MPG to L/100km (Free Fuel Economy Calculator)
Convert fuel economy between MPG (US/UK), km/L, and L/100km. Free, no signup.
Sphere Volume Calculator (Free Geometry Tool)
Calculate the volume and surface area of a sphere from its radius. Free, no signup.
Random PIN Generator (Free, Bulk, No Signup)
Generate random 4-digit PINs in bulk for free. No account, no email.
Coupon Code Generator (Free, Bulk, No Signup)
Generate random unique coupon / promo codes in bulk for free. No account required.
Cursive Text Generator (Free, Copy-Paste Anywhere)
Generate script and cursive Unicode text for bios, captions, and posts. Free, no signup.
Pig Latin Translator (Free, Instant, No Signup)
Translate English to Pig Latin in one click. Free, browser-based, no signup.
Strip HTML Tags Online (Free, Keep Only Text)
Remove all HTML tags from any string and keep only the readable text. Free, no signup.