Access 500+ Free Online Tools In One Place
Everything you need for development, design, security and productivity.
Categories
Text
24 Tools
Converters
33 Tools
Calculators
9 Tools
JSON Tools
2 Tools
Web Dev
23 Tools
Development
14 Tools
Image Tools
20 Tools
8 Tools
Formatters
5 Tools
Generators
23 Tools
Cryptography
15 Tools
Security
12 Tools
Productivity
8 Tools
Time
14 Tools
Data Visualization
12 Tools
Statistics
6 Tools
System Info
10 Tools
Networking
2 Tools
Media Tools
7 Tools
SEO & Marketing
6 Tools
Social Media Tools
10 Tools
Finance
34 Tools
Math
54 Tools
Health & Fitness
26 Tools
Medical
6 Tools
Education
4 Tools
Algorithms
3 Tools
Geography
8 Tools
Physics
41 Tools
Chemistry
12 Tools
Astronomy
8 Tools
Construction
7 Tools
AI Tools
1 Tools
Fun & Games
32 Tools
Text
24 tools available
Character Counter
Count characters, words, and sentences
Text Cleaner
Remove extra spaces, newlines, and other characters
Readability Analyzer
Calculate Flesch-Kincaid reading level, grade score, and readability metrics
Case Converter
Convert text case
Text Repeater
Repeat text multiple times with separators
Text Reverser
Reverse text, words, or letters
Palindrome Checker
Check if a word or phrase is a palindrome with animated highlighting
Text to ASCII
Convert text to ASCII
ASCII to Text
Convert ASCII to text
Text to Speech
Convert text to natural-sounding speech
Converters
33 tools available
Bit/Byte Converter
Convert between bits, bytes, KB, MB, GB, TB, and PB
Step to Calorie Converter
Convert steps to calories burned based on weight and walking pace
MM to Inches Converter
Convert millimeters to inches and between all common length units
KG to LBS Converter
Convert kilograms to pounds and between all common weight units
ML to OZ Converter
Convert milliliters to fluid ounces and between all common volume units
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit and between all temperature units
Grams to Cups Converter
Convert grams to cups for cooking and baking ingredients
Kelvin to Celsius Converter
Convert Kelvin to Celsius and Fahrenheit - scientific temperature tool
Grams to Ounces Converter
Convert grams to ounces and between metric and imperial weight units
Grams to Pounds Converter
Convert grams to pounds and between metric and imperial weight units
Calculators
9 tools available
Dress Size Calculator
Calculate women's dress size and convert between US, UK, EU, and AU sizing systems
Capacitance Calculator
Calculate capacitance for parallel, series, plate capacitors, and energy storage
Heat Index Calculator
Calculate heat index and apparent temperature from temperature and humidity
Rainfall Volume Calculator
Calculate water volume from rainfall for rainwater harvesting
Crop Factor Calculator
Calculate crop factor and focal length equivalents for camera sensors
Air Density Calculator
Calculate air density based on temperature, pressure, and humidity
Wind Chill Calculator
Calculate wind chill temperature based on air temperature and wind speed
Carbon Footprint Calculator
Estimate yearly carbon emissions based on travel, electricity, and food habits
Fuel Cost Calculator
Calculate fuel costs for your trips and daily commutes
JSON Tools
2 tools available
JSON to JSON Schema
Generate JSON Schema from JSON data automatically with customizable options
JSON Tree Viewer
Visualize JSON data with interactive collapsible tree
Web Dev
23 tools available
HTML Preview
Live HTML, CSS, and JavaScript editor with preview
Code Highlighter
Syntax highlighting for 20+ programming languages
CSS Flexbox Generator
Visual tool to generate CSS Flexbox layouts
CSS Grid Generator
Visual tool to generate CSS Grid layouts
Box Shadow Generator
Create CSS box shadows visually
Border Radius Generator
Create custom border radius visually
Text Shadow Generator
Create CSS text shadows visually
CSS Clip Path Maker
Create custom CSS clip-path shapes
CSS Gradient Generator
Create beautiful CSS gradients with live preview
Color Picker
Pick and convert colors
Development
14 tools available
UUID Generator
Generate UUIDs
Nano ID Generator
Generate Nano IDs
HTTP Status Codes
Quick reference for HTTP status codes
Regex Tester
Test regular expressions
Regex Library
Common regex patterns for validation and text processing
Diff Checker
Compare text and code differences
Cron Generator
Create cron expressions for task scheduling
URL Parameter Parser
Parse and build URL query strings and parameters
Logic Gate Calculator
Interactive logic gate simulator with AND, OR, NOT, NAND, NOR, XOR, XNOR
XOR Calculator
Calculate XOR operations with binary, decimal, and hexadecimal support
Image Tools
20 tools available
Profile Picture Cropper
Crop, resize, and edit profile pictures for social media with filters and effects
SVG to PNG Converter
Convert SVG files to PNG images with custom dimensions and settings
Image Converter
Convert JPG, PNG, WebP images
Image Compressor
Compress and reduce image file size
Image Cropper
Crop, resize, and rotate images online
Image Resizer
Resize images with custom dimensions and presets
Image Watermark
Add text or image watermarks to photos
Image Color Palette
Extract dominant colors from images with HEX, RGB, HSL
EXIF Viewer/Remover
View and remove EXIF metadata from images
Image Pixelator
Create pixelated or mosaic effects on images
8 tools available
PDF Metadata Editor
Edit PDF metadata including title, author, subject, and keywords
Text to PDF Converter
Convert plain text or Markdown to downloadable PDF
PDF Text Extractor
Extract and display all readable text from PDF pages
PDF Split/Merge
Split PDF into pages or merge multiple PDFs
PDF Compressor
Reduce PDF file size while maintaining quality
PDF to Image
Convert PDF pages to PNG, JPG, WEBP images
Image to PDF
Convert multiple images to PDF document
PDF Rotator
Rotate PDF pages clockwise or counterclockwise
Formatters
5 tools available
JSON Validator/Formatter
Validate and format JSON with error detection
JSON Formatter
Format and beautify JSON
XML Formatter
Format, validate, and minify XML
CSS Formatter
Format, beautify, and minify CSS
SQL Formatter
Format and beautify SQL queries
Generators
23 tools available
Email Extractor
Extract and validate email addresses from any text
Lottery Number Generator
Generate random lottery numbers for Powerball, Mega Millions, and more
CURL Command Generator
Build CURL commands visually with all options
Speed Test
Test your internet download and upload speed
Random Team Generator
Split people into random teams
Random Card Generator
Draw random playing cards from deck
Random Number Generator
Generate random numbers
Random Letter Generator
Generate random letters
Random Month Generator
Generate random months
Random IP Generator
Generate random IP addresses
Cryptography
15 tools available
MD5 Hash
Generate MD5 hashes
SHA-1 Hash
Generate SHA-1 hashes
SHA-256 Hash
Generate SHA-256 hashes
SHA-512 Hash
Generate SHA-512 hashes
SHA-384 Hash
Generate SHA-384 hashes
Bcrypt Hash
Generate Bcrypt hashes
Base64 Encoder
Encode text to Base64
Base64 Decoder
Decode Base64 to text
Base32 Encoder/Decoder
Encode and decode text using Base32 encoding
URL Encoder
Encode URLs and query strings
Security
12 tools available
Password Generator
Generate strong random passwords
Passphrase Generator
Generate memorable passphrases
Strength Checker
Check password strength
PIN Generator
Generate random PIN codes
Bulk Password Generator
Generate multiple passwords at once
Kids Password Generator
Generate kid-friendly passwords
API Key Generator
Generate secure API keys
License Key Generator
Generate software license keys
SSH Key Generator
Generate SSH keys
File Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 file hashes
Productivity
8 tools available
To-Do List Maker
Simple task manager with local storage persistence
Reminder Scheduler
Schedule browser notifications or email reminders for events
Markdown Preview
Preview markdown in real-time
CSV Viewer & Editor
View and edit CSV files online
ChatGPT Prompts
Curated collection of expert role-based ChatGPT prompts for various domains
Character Map
Browse and copy special characters with Unicode info
Countdown Timer
Count down to any date and time
Stopwatch
Precise stopwatch with lap timer functionality
Time
14 tools available
Age Difference Calculator
Calculate age gap between two people with detailed insights and relationship guidance
Calendar Generator
Generate and download printable monthly or yearly calendars
Timestamp Converter
Convert between Unix timestamps and dates
Age Calculator
Calculate exact age in years, months, and days
Korean Age Calculator
Calculate Korean age, international age, and year age
Leap Year Calculator
Check if a year is a leap year and find nearby leap years
Lunar Age Calculator
Calculate age based on lunar calendar and moon cycles
Cat Age Calculator
Convert cat age to human years and human age to cat years
Dog Age Calculator
Convert dog age to human years by size (small, medium, large)
Day of Week Calculator
Find out what day of the week any date falls on
Data Visualization
12 tools available
Line Chart Creator
Create beautiful line charts with multiple series and customizable options
Histogram Generator
Create histograms with frequency distributions and customizable colors
Heatmap Creator
Create beautiful heatmaps with customizable color schemes and data visualization
Bubble Chart Maker
Create beautiful bubble charts to visualize multi-dimensional data
Area Chart Builder
Create beautiful area charts with customizable data, multiple series, and export options
Pie Chart Maker
Create interactive pie charts by entering values and labels, export as PNG
Bar Graph Generator
Generate bar charts with customizable labels, colors, and axes
Venn Diagram Generator
Create and customize 2 or 3-circle Venn diagrams
Tree Diagram Builder
Create org charts, family trees, and decision trees with collapsible nodes
Gantt Chart Creator
Create project timelines with tasks, dependencies, and milestones
Statistics
6 tools available
P-Value Calculator
Calculate p-values for Z-test, T-test, and Chi-square hypothesis tests
Sum of Squares Calculator
Calculate sum of squares with variance, standard deviation, and step-by-step solutions
Harmonic Mean Calculator
Calculate harmonic mean with comparison to arithmetic and geometric means
Geometric Mean Calculator
Calculate geometric mean with comparison to arithmetic and harmonic means
Standard Deviation Calculator
Calculate standard deviation, variance, and statistics
Z-score Calculator
Calculate Z-scores, percentiles, and probabilities for normal distribution
System Info
10 tools available
Browser Feature Detector
Check browser feature support
Device Info Detector
Check device information
Screen Resolution Checker
Check screen resolution
Microphone Test Tool
Test your microphone, check audio levels in real-time, and record audio samples
Webcam Resolution Tester
Test your webcam's supported resolutions, check video quality, and capture snapshots
Installed Fonts Detector
Detect and preview installed fonts on your system
Frame Rate (FPS) Test
Test and monitor your browser's frame rate performance
Keyboard Tester
Test your keyboard keys with visual feedback
Mouse Click Tracker
Track and visualize mouse clicks per second
GPU Information Viewer
View GPU renderer and memory information
Networking
2 tools available
Download Time Calculator
Calculate download time based on file size and internet speed with interactive sliders
IP Subnet Calculator
Calculate subnet information for IPv4 addresses
Media Tools
7 tools available
Audio Speed Changer
Change audio playback speed with real-time preview and pitch control
Video Format Converter
Convert video files between different formats with customizable quality and resolution settings
Audio Converter
Convert between MP3 and WAV formats and more formats directly in browser
Video Speed Changer
Adjust playback speed for video (slow-motion or fast-forward)
Video Frame Extractor
Extract frames or thumbnails from a video at custom timestamps
MP3 Cutter
Cut and trim audio files directly in the browser
MP4 to MP3 Converter
Extract audio from video files instantly using ffmpeg.wasm
SEO & Marketing
6 tools available
Slug Generator
Generate SEO-friendly URL slugs from text with customizable formatting options
SEO Analyzer
Analyze HTML for SEO
Privacy Policy Generator
Generate GDPR & CCPA compliant privacy policies
Robots.txt Generator
Create custom robots.txt files for SEO
Terms of Service Generator
Generate comprehensive Terms of Service for your website
UTM Link Builder
Create UTM tracking URLs for marketing campaigns and analytics
Finance
34 tools available
Income Tax Calculator (India)
Calculate Indian income tax with new and old regime comparison
Home Loan EMI Calculator
Calculate home loan EMI with amortization schedule and interest breakdown
Quick Ratio Calculator
Calculate quick ratio (acid test ratio) for liquidity analysis
EVM Calculator
Calculate Earned Value Management metrics for project performance tracking
APR Calculator
Calculate APR, APY, and effective interest rates for loans and savings
CD Calculator
Calculate Certificate of Deposit returns with compound interest and APY
Markup Calculator
Calculate markup, margin, selling price, and profit for pricing decisions
Margin Calculator
Calculate profit margin, markup, and optimal pricing
EBITDA Calculator
Calculate EBITDA, EBIT, and EBITDA margin with detailed breakdown
Loss Ratio Calculator
Calculate insurance loss ratio and combined ratio with profitability analysis
Math
54 tools available
Prime Number Generator
Generate prime numbers in any range using efficient algorithms
Factorial Calculator
Calculate factorials, permutations, and combinations with steps
Perfect Square Calculator
Check if a number is a perfect square and find square roots
Perfect Cube Calculator
Check if a number is a perfect cube and find cube roots
Cube Root Calculator
Calculate cube roots with simplification and step-by-step solutions
RMS Calculator
Calculate Root Mean Square for datasets, AC voltage and current
Acceleration Calculator
Calculate acceleration using velocity, force, distance, or gravity
Dew Point Calculator
Calculate dew point, heat index, humidex, and comfort levels
Earthquake Calculator
Calculate earthquake magnitude, energy, intensity, and compare seismic events
Angular Acceleration Calculator
Calculate angular acceleration from velocity, torque, RPM, or linear acceleration
Health & Fitness
26 tools available
Waist-to-Hip Ratio Calculator
Calculate WHR to assess body fat distribution and health risks
Heart Rate Zone Calculator
Calculate heart rate training zones for optimal fitness and performance
Sleep Debt Calculator
Calculate your sleep debt and get personalized recovery plans with weekly tracking
Pregnancy BMI Calculator
Calculate pregnancy BMI and track recommended weight gain with trimester guidance
BMI Calculator for Kids
Calculate BMI percentile for children and teens aged 2-20 with health recommendations
Total Body Water Calculator
Calculate total body water, ICW/ECW distribution, and daily hydration needs
BMI Calculator for Women
Calculate BMI, ideal weight, and body fat percentage for women
TDEE Calculator
Calculate Total Daily Energy Expenditure, BMR, and macronutrient needs for your fitness goals
Arterial Age Calculator
Calculate your arterial age based on cardiovascular risk factors and get personalized health recommendations
BMR Calculator
Calculate Basal Metabolic Rate and daily calorie needs
Medical
6 tools available
Pediatric Dosage Calculator
Calculate safe medication dosages for children based on body weight
MELD Score Calculator
Calculate MELD and MELD-Na scores for liver disease severity assessment
Tidal Volume Calculator
Calculate ideal tidal volume for mechanical ventilation based on IBW
Mean Arterial Pressure Calculator
Calculate MAP from blood pressure to assess organ perfusion
PF Ratio Calculator
Calculate PaO2/FiO2 ratio for ARDS severity assessment
IV Fluids Calculator
Calculate drip rates, maintenance fluids, and bolus infusions
Education
4 tools available
Multiplication Table Generator
Generate and print multiplication tables for learning and practice
Study Timer (Pomodoro Clock)
Focus timer using Pomodoro technique with custom intervals and sounds
Online Flashcard Maker
Create, edit, and test flashcards with save-to-browser memory
GPA Calculator
Compute GPA or CGPA from grades and credits with visual chart
Algorithms
3 tools available
N-Queens Visualizer
Solve and visualize the N-Queens problem with interactive animations
Sorting Algorithm Visualizer
Visualize sorting algorithms with animations
Binary Search Visualizer
Visualize binary search algorithm step by step
Geography
8 tools available
Temperature at Altitude Calculator
Calculate temperature at different altitudes using atmospheric lapse rate
Latitude Longitude Distance Calculator
Calculate distance between two geographic coordinates using Haversine formula
Earth Curvature Calculator
Calculate Earth's curvature drop and horizon distance
Random City Picker
Pick random cities from around the world with filters
Random Flag Quiz
Test your knowledge of world flags with this interactive quiz
Random Country Generator
Discover random countries with flags, capitals, and population info
World Capital Quiz
Test your geography knowledge with an interactive quiz on world capitals
3D Rotating Globe
Interactive 3D earth globe that can be rotated and zoomed using Three.js
Physics
41 tools available
Watts to Amps Calculator
Calculate watts to amps, amps to watts for DC and AC circuits
Torque Calculator
Calculate torque using force, power, angular acceleration, or moment of inertia
Series Resistor Calculator
Calculate total resistance, current, voltage drops, and power for series circuits
Parallel Resistor Calculator
Calculate total resistance, current, branch currents, and power for parallel circuits
Centrifugal Force Calculator
Calculate centrifugal force with acceleration and angular velocity calculations
Angular Frequency Calculator
Calculate angular frequency, frequency, period, and RPM with conversions
Angular Momentum Calculator
Calculate angular momentum for point mass, rigid body, and orbital systems
RLC Calculator
Calculate resonance, impedance, and reactance for RLC circuits
Stress Calculator
Calculate mechanical stress (tensile, compressive, shear) with safety analysis
Time Dilation Calculator
Calculate relativistic time dilation from velocity and gravity
Chemistry
12 tools available
Activation Energy Calculator
Calculate activation energy using Arrhenius equation with step-by-step solutions
Chemical Equation Balancer
Balance chemical equations automatically with verification
Bond Order Calculator
Calculate bond order using molecular orbital theory to determine bond strength and stability
Normality Calculator
Calculate normality of chemical solutions from molarity, mass, or dilution
Boiling Point Calculator
Calculate boiling points for various substances at different pressures using the Antoine equation
pH Calculator
Calculate pH, pOH, and ion concentrations for acids and bases
Dilution Calculator
Calculate dilutions using C1V1=C2V2 formula for mass per volume
Periodic Table Quiz
Test your knowledge of chemical elements
Periodic Table Viewer
Interactive periodic table with atomic data and trends
Molarity Calculator
Calculate molarity, moles, mass, volume for solutions. Includes dilution calculator
Astronomy
8 tools available
Age on Other Planets Calculator
Calculate your age on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune
Orbital Velocity Calculator
Calculate orbital velocity, period, and escape velocity for celestial bodies
Solar System 3D
Interactive 3D visualization of the solar system with planet information
Escape Velocity Calculator
Calculate escape velocity for planets and celestial bodies
Luminosity Calculator
Calculate stellar luminosity using Stefan-Boltzmann law
Light Year Converter
Convert between light years, parsecs, AU, and other astronomical distances
Orbital Period Calculator
Calculate orbital period and velocity using Kepler's Third Law
Weight on Other Planets
Calculate your weight on different planets and moons in the solar system
Construction
7 tools available
Concrete Calculator
Calculate concrete volume, materials, and cost for slabs, footings, columns, walls, and stairs
Steel Weight Calculator
Calculate steel weight for various shapes with visual guides
Stair Calculator
Calculate stair dimensions, rise, run, angle, and total materials needed with visual diagrams
Carpet Area Calculator
Compute carpet, built-up, and super-built area for homes
Beam Deflection Calculator
Calculate deflection, bending moment, and shear force for structural beams
Roof Pitch Calculator
Calculate roof pitch, slope angle, rafter length, and roof area
Tile Calculator
Calculate tiles needed for your floor or wall project with waste factor
Fun & Games
32 tools available
Pig Latin Translator
Convert English to Pig Latin and back - fun word play language game
Bingo Card Generator
Generate random bingo cards for games and events with customizable options
Metronome
Online metronome with adjustable tempo, time signatures, and subdivisions
Minesweeper
Classic Minesweeper game with three difficulty levels
Color Sequence Memory Game
Test your memory with the classic Simon Says color sequence game
Tower of Hanoi
Solve the classic Tower of Hanoi puzzle with interactive visualization
Stopwatch Accuracy Challenge
Test your timing skills by stopping at exactly 10 seconds
Sliding Number Puzzle
Play the classic 15-puzzle game with 3x3, 4x4, and 5x5 grids
Tetris Game
Play classic Tetris with modern controls and beautiful UI
Spelling Quiz Generator
Generate interactive spelling quizzes with audio pronunciation
Social Media Tools
10 tools available
QR Code Generator
Generate QR codes
QR Code Decoder
Decode QR codes
Meme Generator
Create funny memes with custom text and images
YouTube Thumbnail Downloader
Download YouTube video thumbnails in all qualities
Mockup Frame Generator
Place screenshots or images inside realistic device mockups
Emoji Picker & Copier
Browse and copy emojis by category and skin tone
WhatsApp Status Messages
Beautiful collection of motivational quotes and inspirational messages for WhatsApp status
Instagram Post Generator
Create realistic Instagram post mockups with customizable content
Tweet Generator
Create realistic Twitter post mockups with customizable content
Code to Image Converter
Create realistic code to image mockups with customizable content