Free Online Toolsfor Everyone
Fast, private, and beautifully designed. No installation needed.
Most Popular Tools
Top tools used by millions every month
Percentage Calculator
Calculate percentages easily. Find what percent of a number, percentage change, and more.
JPG to PDF Converter
Convert JPG images to PDF documents for free, online, directly in your browser.
Password Generator
Generate strong, secure passwords instantly. Customize length and character types.
Word Counter
Count words, characters, sentences, and paragraphs. Estimate reading and speaking time.
PNG to PDF Converter
Convert PNG images to PDF documents for free, online, directly in your browser.
BMI Calculator
Calculate your Body Mass Index (BMI) based on height and weight.
WebP to PNG Converter
Convert WebP images to PNG format for free, online, in your browser.
WebP to JPG Converter
Convert WebP images to JPG format for free, online, in your browser.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Scientific Calculator
Advanced calculator with trigonometric, logarithmic, and exponential functions.
100% Client-Side
All processing happens in your browser. No data is sent to any server.
Dark Mode
Easy on your eyes with automatic dark mode support.
Multilingual
Available in multiple languages for global users.
Topic Guides
In-depth guides covering everything about a topic — tools, converters, and tips in one place.
Complete Guide to Weight Conversion
Everything you need to know about converting between kilograms, pounds, ounces, grams, and other weight units. Instant calculators, conversion formulas, and quick-reference tables.
3 toolsGuideComplete Guide to Text Analysis Tools
A comprehensive guide to text analysis tools that help writers, students, and SEO professionals work faster and produce better content. From word counting to readability scoring.
6 toolsGuideComplete Guide to Financial Calculators
Master your personal finances with our complete suite of financial calculators. From mortgage planning to retirement savings, learn how to use each calculator and make smarter money decisions.
9 toolsGuideComplete Guide to Image Conversion
Convert, compress, and resize images directly in your browser. No uploads, no servers, no privacy concerns. Learn when to use each format and how to optimize images for web, print, and social media.
11 toolsGuideComplete Guide to GPA & Academic Calculators
Everything students need to know about GPA calculation, grading systems around the world, and academic planning. Calculate your GPA, set targets, and understand what colleges expect.
3 toolsBrowse by Category
Developer Tools
25 tools
Hex / Binary / Decimal Converter
Convert numbers between hexadecimal, binary, decimal, and octal formats.
JSON Formatter
Format, validate, and minify JSON data with syntax highlighting.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 to text for free, online, in your browser.
CSV to JSON Converter
Convert CSV data to JSON format for free, online, in your browser.
JSON to CSV Converter
Convert JSON data to CSV format for free, online, in your browser.
Markdown to HTML Converter
Convert Markdown text to HTML for free, online, in your browser.
XML to JSON Converter
Convert XML data to JSON format for free, online, in your browser.
URL Encoder / Decoder
Encode or decode URL components. Converts special characters to percent-encoded format.
UUID Generator
Generate random UUID v4 identifiers. Create single or bulk UUIDs with one click.
Hash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes from text input. All processing happens in your browser.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. View the current timestamp in real-time.
Color Converter
Convert colors between HEX, RGB, and HSL formats with a live preview.
CSS Gradient Generator
Create beautiful CSS gradients with a visual editor. Supports linear, radial, and conic gradients.
CSS Box Shadow Generator
Design box shadows visually with sliders and get the CSS code instantly.
CSS Border Radius Generator
Generate CSS border-radius values with a visual editor for all four corners.
Color Palette from Image
Extract the dominant color palette from any image. Get HEX codes for each color.
Markdown Editor
Write Markdown with a live HTML preview. Includes a toolbar for common formatting.
Regex Tester
Test regular expressions in real-time with match highlighting, flag options, and common pattern presets.
JWT Decoder
Decode JWT tokens to view header, payload, and signature. Check expiration status. 100% client-side.
SQL Formatter
Format and beautify SQL queries with customizable indentation and keyword casing options.
Cron Expression Generator
Build cron expressions visually with real-time preview of next execution times.
JavaScript Beautifier
Beautify or minify JavaScript and TypeScript code with customizable formatting options.
HTML Formatter
Format and beautify HTML code with proper indentation and structure.
LLM API Cost Calculator
Compare API costs across GPT-4o, Claude, Gemini, and other LLMs based on your token usage.
Token Counter
Estimate token count for GPT-4o, Claude, and Gemini. See how much of the context window your text uses.
Converters
20 tools
Unit Converter
Convert between units of length, weight, temperature, volume, speed, and more.
JPG to PDF Converter
Convert JPG images to PDF documents for free, online, directly in your browser.
PNG to PDF Converter
Convert PNG images to PDF documents for free, online, directly in your browser.
WebP to PNG Converter
Convert WebP images to PNG format for free, online, in your browser.
WebP to JPG Converter
Convert WebP images to JPG format for free, online, in your browser.
PDF Merge
Merge multiple PDF files into one document for free, online, in your browser.
PDF Split
Split PDF files into separate pages or custom ranges for free, online, in your browser.
HEIC to JPG Converter
Convert HEIC/HEIF images to JPG format for free, online, in your browser.
PNG to JPG Converter
Convert PNG images to JPG format for free, online, in your browser.
JPG to PNG Converter
Convert JPG images to PNG format for free, online, in your browser.
JPG to WebP Converter
Convert JPG images to WebP format for free, online, in your browser.
PNG to WebP Converter
Convert PNG images to WebP format for free, online, in your browser.
Image Compressor
Compress images to reduce file size for free, online, in your browser.
SVG to PNG Converter
Convert SVG vector images to PNG format for free, online, in your browser.
AVIF to JPG Converter
Convert AVIF images to JPG format for free, online, in your browser.
Image Resizer
Resize images to custom dimensions for free, online, in your browser.
Air Fryer Calculator
Convert oven recipes to air fryer — adjust temperature and cooking time.
Time Zone Converter
Convert time between different time zones around the world.
Cooking Unit Converter
Convert cooking measurements between cups, tablespoons, teaspoons, ml, oz, grams, and more with ingredient-specific densities.
Shoe Size Converter
Convert shoe sizes between US, UK, EU, and CM/JP systems for men, women, and kids.
Math & Calculators
15 tools
Percentage Calculator
Calculate percentages easily. Find what percent of a number, percentage change, and more.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth.
Date Calculator
Calculate the number of days between two dates or add/subtract days from a date.
Tip Calculator
Calculate tip amount and split the bill among friends easily.
Loan Calculator
Calculate monthly payments, total interest, and amortization schedule for any loan.
GPA Calculator
Calculate your Grade Point Average (GPA) by entering courses, grades, and credit hours.
Scientific Calculator
Advanced calculator with trigonometric, logarithmic, and exponential functions.
Standard Deviation Calculator
Calculate standard deviation, variance, mean, and other statistics for a data set.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step results.
Quadratic Equation Solver
Solve quadratic equations (ax² + bx + c = 0) and find roots, vertex, and discriminant.
Grade Calculator
Calculate weighted grade averages and determine what score you need on your final exam.
Aspect Ratio Calculator
Calculate aspect ratios from dimensions or find missing dimensions based on a ratio.
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals. Supports values from 1 to 3,999.
Dog Age Calculator
Convert your dog's age to human years based on breed size.
Probability Calculator
Calculate probability for single events, combined events, and permutations/combinations.
Finance
17 tools
Mortgage Calculator
Calculate monthly mortgage payments, total interest, and total cost.
Compound Interest Calculator
Calculate compound interest with regular contributions over time.
Salary Calculator
Convert your salary between hourly, daily, weekly, biweekly, monthly, and annual.
Paycheck Calculator
Estimate your take-home pay after taxes based on your gross salary.
Inflation Calculator
Calculate the impact of inflation on purchasing power over time.
Sales Tax Calculator
Calculate sales tax amount and total price, or reverse-calculate from total.
Discount Calculator
Calculate discount amount, final price, and savings. Supports double discounts.
Fuel Cost Calculator
Calculate the fuel cost for your trip based on distance, fuel efficiency, and gas price.
Electricity Cost Calculator
Estimate your electricity costs based on appliance wattage, usage hours, and electricity rates.
APY Calculator
Calculate Annual Percentage Yield and compare compounding frequencies.
Retirement Calculator
Project your retirement savings based on contributions and expected returns.
ROI Calculator
Calculate Return on Investment, annualized ROI, and net profit.
Margin Calculator
Calculate profit margin, markup percentage, and selling price.
Car Loan Calculator
Calculate monthly car payments, total interest, and total cost of your auto loan.
Savings Goal Calculator
Calculate how much you need to save monthly to reach your financial goal.
CAGR Calculator
Calculate the Compound Annual Growth Rate (CAGR) of an investment or find the future value.
Break Even Calculator
Calculate the break-even point in units and revenue based on fixed costs, variable costs, and selling price.
Health & Fitness
18 tools
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and daily calorie needs based on your activity level.
BMI Calculator
Calculate your Body Mass Index (BMI) based on height and weight.
Calorie Calculator
Calculate your daily calorie needs based on your goals and activity level.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method.
BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at rest.
Due Date Calculator
Calculate your pregnancy due date based on your last menstrual period.
Ideal Weight Calculator
Find your ideal weight range using multiple scientific formulas.
Macro Calculator
Calculate your daily macronutrient needs — protein, carbs, and fat in grams.
Ovulation Calculator
Estimate your ovulation date and fertile window based on your menstrual cycle.
Sleep Calculator
Find the best time to sleep or wake up based on 90-minute sleep cycles.
Pace Calculator
Calculate your running pace, speed, and race split times.
Protein Calculator
Calculate your daily protein needs based on weight, activity, and goals.
Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity.
Calorie Deficit Calculator
Calculate the daily calorie deficit needed to reach your target weight.
Heart Rate Zone Calculator
Calculate your heart rate training zones based on age and resting heart rate.
Blood Pressure Range Checker
Check your blood pressure reading and see which category it falls into based on AHA guidelines.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio to assess cardiovascular health risk.
Intermittent Fasting Calculator
Calculate your fasting and eating windows for 16:8, 18:6, 20:4, OMAD, and 5:2 protocols.
Home & DIY
4 tools
Square Footage Calculator
Calculate the area of rooms and estimate materials needed for home projects.
Concrete Calculator
Calculate how much concrete you need in cubic yards, meters, and number of bags.
Paint Calculator
Calculate how much paint you need for a room based on wall dimensions.
Flooring Calculator
Calculate how many tiles or planks you need for your floor, including waste.
Text Tools
8 tools
Word Counter
Count words, characters, sentences, and paragraphs. Estimate reading and speaking time.
Text Case Converter
Convert text between UPPER CASE, lower case, Title Case, camelCase, snake_case, and more.
Readability Checker
Analyze text readability with Flesch-Kincaid scores, grade level, and reading difficulty metrics.
Diff Checker
Compare two texts side by side and highlight the differences between them.
Text Repeater
Repeat any text N times with customizable separator. Newline, space, or custom delimiter.
String Encoder/Decoder
Encode and decode strings with URL encoding, HTML entities, and Base64. Switch between formats instantly.
Text to Slug
Convert text to URL-friendly slugs. Remove special characters, add hyphens, and lowercase automatically.
Find and Replace
Find and replace text with regex support, case sensitivity options, and match highlighting.
Generators
6 tools
Password Generator
Generate strong, secure passwords instantly. Customize length and character types.
Random Number Generator
Generate random numbers within a range with customizable options.
QR Code Reader
Upload an image containing a QR code to decode its content instantly.
Lorem Ipsum Generator
Generate placeholder dummy text in paragraphs, sentences, or words. Copy with one click.
Color Palette Generator
Generate beautiful random color palettes. Lock colors, copy HEX/RGB/HSL, and export CSS variables.
Pomodoro Timer
Boost productivity with the Pomodoro Technique — 25-minute focused work sessions with short breaks.
Fortune & Fun
7 tools
Love Calculator
Calculate love compatibility between two names with fun percentage scores
Chinese Zodiac Calculator
Find your Chinese zodiac animal sign, element, and personality traits by birth year
Zodiac Sign Calculator
Discover your Western zodiac sign, element, and personality traits by birthday
Numerology Calculator
Calculate your Life Path Number and Destiny Number from your birth date and name
Lucky Number Generator
Generate your personal lucky numbers based on your name or birthday
BaZi Calculator
Calculate your Four Pillars of Destiny (BaZi) from birth date and time
Tarot Reading
Draw tarot cards and discover their meanings with beautiful Major Arcana illustrations
Audio & Video
5 tools
Audio Format Converter
Convert audio files between MP3, WAV, OGG, AAC, and FLAC formats. Adjust bitrate for MP3 and AAC. All processing happens locally in your browser.
Video to MP3 Converter
Extract audio from video files. Supports MP4, MOV, AVI, WebM, and MKV. Choose MP3, WAV, or OGG output with adjustable bitrate.
Audio Trimmer
Trim audio files by selecting start and end points. Visualize waveform and preview before cutting. Supports MP3, WAV, OGG, AAC, FLAC.
Audio Speed Changer
Change the playback speed of audio files. Speed up or slow down with pitch preservation option. Supports 0.25x to 4x speed.
Vocal Remover
Remove or extract vocals from audio using phase cancellation. Works with stereo audio files directly in your browser.