Free online tools
for everyday tasks
Count words, generate strong passwords, create QR codes, format JSON, convert colors, and more. No sign-up. Everything runs in your browser.
Text
Word & Character Counter
Instantly count words, characters, sentences, and paragraphs in your text.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.
Text Reverser
Reverse text by characters or by word order in one click.
Remove Duplicate Lines
Delete duplicate lines from any text, with optional trim and case-insensitive matching.
Slug Generator
Convert any title into a clean, URL-friendly slug for SEO and routing.
Morse Code Translator
Convert text to Morse code (or back) for free, no app needed.
Morse Code Decoder
Decode Morse code back to plain English text instantly.
Leet Speak Generator
Convert normal text to 1337 leet speak online for free.
Reverse Word Order
Flip the order of words in any sentence instantly.
Sort Lines Alphabetically
Sort any list of lines A → Z, free and instant.
Sort Lines (Z to A)
Sort lines in reverse alphabetical order instantly.
Shuffle Lines
Randomly shuffle the order of lines in any text.
Remove All Whitespace
Strip every space, tab, and newline from your text.
Remove Line Breaks
Convert multi-line text into a single line. Free and instant.
Add Line Numbers
Prepend line numbers to any block of text quickly.
Repeat Text Generator
Repeat any text N times in one click — free and instant.
NATO Phonetic Alphabet Converter
Convert text to the NATO phonetic alphabet (Alpha, Bravo, Charlie...).
Pig Latin Translator
Translate English to Pig Latin in one click — free, no signup.
Bold Text Generator (Unicode)
Generate bold Unicode text for Instagram, Twitter, and Discord bios.
Italic Text Generator (Unicode)
Make italic Unicode text that works in any social media bio.
Bold Italic Text Generator
Bold + italic Unicode text for fancy bios and posts.
Monospace Text Generator
Generate monospace Unicode text for stylish posts.
Cursive Text Generator
Make script / cursive Unicode text for bios and captions.
Double Struck Text Generator
Generate 𝕕𝕠𝕦𝕓𝕝𝕖 𝕤𝕥𝕣𝕦𝕔𝕜 Unicode text instantly.
Bubble Text Generator
Turn text into Ⓑⓤⓑⓑⓛⓔ letters for fun captions.
Square Text Generator
Generate squared Unicode letters for unique posts.
Small Caps Generator
ᴄᴏɴᴠᴇʀᴛ text to small caps Unicode for stylish bios.
Upside Down Text Generator
Flip text upside down (ɥsᴉꞁƃuǝ ʞɔɐq) for fun posts.
Strikethrough Text Generator
Add strikethrough to any text using Unicode combining marks.
Underline Text Generator
Underline text with Unicode marks — works in any field.
Zalgo Text Generator
Generate glitchy Z̴̢̛̥a̷̛̦̤l̶̳̔ġ̶̦o̶̦̅ text with adjustable intensity.
Generator
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum paragraphs, sentences, or words for your designs.
Password Generator
Create strong, secure, random passwords with customizable length and characters.
QR Code Generator
Generate free QR codes for URLs, text, Wi-Fi, and more. Download as PNG.
UUID Generator
Generate v4 UUIDs (universally unique identifiers) in bulk, free and instant.
Random Number Generator
Pick random numbers in any range, with options for uniqueness and bulk output.
Online Dice Roller
Roll virtual dice (d4, d6, d8, d10, d12, d20, d100) for tabletop games.
MAC Address Generator
Generate random valid MAC addresses for testing. Free.
Random IP Address Generator
Generate random IPv4 addresses for testing and demos.
Random IPv6 Address Generator
Generate random valid IPv6 addresses for testing.
Test Credit Card Number Generator
Generate Luhn-valid test credit card numbers (not real) for sandbox use.
Random PIN Generator
Generate random 4-digit PINs in bulk, free.
Coupon Code Generator
Generate random promo / coupon codes in bulk for free.
OTP Code Generator
Generate random 6-digit one-time-password codes.
Random Hex Color Generator
Generate random HEX colors with one click. Free, no signup.
Online Coin Flip
Flip a virtual coin online — free, instant, no app needed.
Yes or No Decision Maker
Get a random Yes or No answer to settle decisions fast.
Random Letter Picker
Pick a random letter A–Z instantly.
Random Emoji Picker
Get a random emoji or batch of emojis. Free and instant.
Random Username Generator
Generate random, unique usernames for any account.
ISBN-13 Generator
Generate Luhn-valid ISBN-13 numbers for testing book systems.
Test IBAN Generator
Generate test IBAN numbers (UK format) for sandbox testing.
Developer
JSON Formatter & Validator
Format, beautify, validate, and minify JSON data online for free.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text.
URL Encoder / Decoder
Percent-encode or decode URLs and query strings safely and instantly.
HTML Encoder / Decoder
Escape HTML special characters or decode HTML entities back to text.
Hash Generator (SHA-1/256/384/512)
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text in your browser.
JWT Decoder
Decode the header and payload of any JSON Web Token (JWT) for debugging.
Text Diff Checker
Compare two pieces of text and highlight added or removed lines.
CSS Minifier
Minify CSS instantly to reduce file size and speed up your website.
Text to Binary Converter
Convert any text to 8-bit binary code instantly. Free, no sign-up.
Binary to Text Converter
Decode 8-bit binary back to readable text in seconds.
Text to Hex Converter
Convert text to hexadecimal ASCII codes for free.
Hex to Text Converter
Decode hexadecimal back to readable text instantly.
ROT13 Encoder / Decoder
Apply the classic ROT13 letter substitution cipher.
Atbash Cipher
Encode or decode text with the Atbash substitution cipher.
Strip HTML Tags
Remove all HTML tags from text and keep only readable content.
JSON to CSV Converter
Convert JSON arrays to clean CSV instantly. Free, no signup.
CSV to JSON Converter
Convert CSV data to formatted JSON arrays free online.
JSON to YAML Converter
Convert JSON to clean YAML in one click. Free, no signup.
JSON to XML Converter
Convert JSON objects to clean XML format instantly.
HTML Minifier
Minify HTML to reduce file size and speed up your site.
JavaScript Minifier (Basic)
Quick comment and whitespace strip for JavaScript code.
Markdown Table Generator
Convert CSV or TSV data into a Markdown table instantly.
URL Parser
Break any URL into protocol, host, path, query, and hash parts.
Converter
Color Converter (HEX / RGB / HSL)
Pick a color and convert between HEX, RGB, and HSL formats.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates (UTC and local).
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases.
Length Converter
Convert between metric and imperial units of length (mm, cm, m, km, in, ft, yd, mi).
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
Weight Converter
Convert between grams, kilograms, tons, ounces, pounds, and stones.
Speed Converter (mph, kph, m/s)
Convert speeds between mph, km/h, m/s, knots, and ft/s.
Area Converter (m², ft², acres)
Convert area between square meters, feet, acres, hectares, and more.
Volume Converter (liters, gallons, cups)
Convert volume between ml, liters, gallons, cups, and more.
Time Unit Converter
Convert between seconds, minutes, hours, days, weeks, months, and years.
Data Storage Converter (KB, MB, GB)
Convert bytes, KB, MB, GB, TB and binary KiB/MiB/GiB free.
Bandwidth Converter (Mbps, MB/s)
Convert between bits/sec, Mbps, Gbps, and MB/s. Free, instant.
Energy Converter (J, kWh, cal, BTU)
Convert energy between joules, calories, watt-hours, and BTU.
Power Converter (Watts, HP, kW)
Convert between watts, kilowatts, horsepower, and BTU/h.
Pressure Converter (PSI, bar, kPa)
Convert pressure between PSI, bar, kPa, atm, and mmHg.
Angle Converter (degrees, radians)
Convert angles between degrees, radians, gradians, and turns.
Frequency Converter (Hz, kHz, MHz)
Convert frequency between Hz, kHz, MHz, GHz, and RPM.
Fuel Economy Converter (MPG ↔ L/100km)
Convert fuel economy between MPG (US/UK), km/L, and L/100km.
Typography Unit Converter (px, em, pt)
Convert between px, em, rem, pt, pc, in, cm, mm for CSS.
Force Converter (Newtons, lbf)
Convert force between Newtons, kN, pound-force, and kgf.
Cooking Measurement Converter
Convert between teaspoons, tablespoons, cups, fl oz, ml, and liters.
Calculator
BMI Calculator
Calculate your Body Mass Index (BMI) instantly using metric or imperial units.
Age Calculator
Calculate your exact age in years, months, days, hours and minutes.
Percentage Calculator
Calculate percentages, percent of a number, and percentage change quickly.
Tip Calculator
Calculate tip amount, total bill, and split the bill between any number of people.
Loan Payment Calculator
Estimate monthly loan payments, total interest, and total cost for any loan.
Discount Calculator
See how much you save and the final price for any percentage discount.
Compound Interest Calculator
See how your investment grows with compound interest. Free, no sign-up.
Simple Interest Calculator
Calculate simple interest on a loan or deposit instantly.
Mortgage Calculator
Calculate monthly mortgage payments, total interest, and total cost.
ROI Calculator
Calculate return on investment (ROI) and profit instantly.
Profit Margin Calculator
Calculate gross profit margin, markup, and profit from revenue and cost.
Markup Calculator
Calculate selling price from cost and markup percentage.
Sales Tax Calculator
Calculate sales tax and total price for any tax rate.
VAT Calculator
Add or remove VAT from any net or gross price instantly.
GST Calculator
Calculate GST on any amount — works for AU, IN, NZ rates.
GPA Calculator
Calculate your GPA from grades and credit hours, free.
Grade Calculator
Convert points earned into a percentage and letter grade.
Ratio Calculator
Simplify ratios and scale them up or down. Free, instant.
Aspect Ratio Calculator
Calculate aspect ratios and resize while keeping proportions.
Circle Area Calculator
Calculate the area and circumference of a circle from radius.
Triangle Area Calculator
Calculate triangle area from base and height.
Rectangle Area Calculator
Calculate area and perimeter of a rectangle.
Sphere Volume Calculator
Calculate volume and surface area of a sphere from radius.
Pythagorean Theorem Calculator
Calculate the hypotenuse of a right triangle (a² + b² = c²).
Fraction to Decimal Calculator
Convert any fraction to a decimal value instantly.
Electricity Cost Calculator
Estimate how much an appliance costs to run per day/month/year.
Typing Speed (WPM) Calculator
Calculate your words-per-minute from words typed and time.
Reading Time Calculator
Estimate reading time for any word count and speed.
Why ToolStack?
ToolStack is a collection of free, browser-based tools that solve small everyday problems quickly. Whether you're a writer counting words for an essay, a developer formatting JSON, a designer picking colors, or just someone who needs a strong password — there's a tool here for you.
Private by design
Every tool runs entirely in your browser. Your text, files, and inputs never leave your device — we don't store or transmit them.
Always free
No accounts, no paywalls, no usage limits. ToolStack is supported by unobtrusive advertising so it can remain free for everyone.