Tools Catalog
Hundreds of free tools to boost your productivity
Text & Strings
31ISBN Validator
Validate ISBN-10 and ISBN-13 book identifiers
Case Converter
Convert text case (UPPER, lower, CamelCase, snake_case)
Line Ending Normalizer PRO
Convert line endings between LF, CRLF and CR across any text or code file
Palindrome Checker
Check if text is a palindrome and find palindrome words
Base64 Encoder
Encode text to Base64
Text to Slug
Convert text to URL-friendly slug
Number to Words
Spell out numbers in English or Russian words
Upside Down Text Generator
Flip text upside down using Unicode characters
Remove Whitespace
Remove all spaces and whitespace from text
Levenshtein Distance
Measure edit distance and text similarity
Comma Separator
Join list items with commas
Bulk Text Replacer PRO
Apply multiple find-and-replace rules to text in one pass, with regex support
Base64 Decoder
Decode Base64 to text
Leetspeak Converter
Convert text to leetspeak and back with adjustable intensity
Emojis Remover
Remove emojis from text
Duplicate Line Remover
Remove duplicate lines from text
Anagram Finder
Find anagrams from text input
Morse Code Converter
Convert text to Morse code and back
Text Statistics
Get detailed text statistics: sentences, paragraphs, reading time and more
Word Counter
Count words, characters, and lines
Text Sort & Dedupe PRO
Sort lines alphabetically or by length and remove duplicate lines from any text
Text Diff Checker PRO
Compare two texts and highlight differences line by line
Reverse Text
Reverse text content
Text Repeater
Repeat text a number of times with a separator
Text Separator
Split text by a separator into a list
Anagram Solver
Find words and anagrams from your letters
Remove Line Breaks
Remove line breaks and replace them with a separator
Character Counter
Count characters with and without spaces
E.164 Phone Validator
Validate phone numbers against the E.164 standard
Unicode Normalizer PRO
Normalize Unicode form, fix smart quotes, fancy dashes and zero-width characters
Email Extractor
Extract email addresses from text
Code & Dev Tools
31YAML to JSON
Convert YAML documents to JSON format
JSON Validator
Validate JSON syntax
XML Formatter
Format and beautify XML
Base32 Encoder & Decoder
Encode or decode Base32 strings
JavaScript Minifier
Minify JavaScript code
Query String Parser
Parse URLs and query strings into structured parameters
URL Encoder/Decoder
Encode and decode URLs
TOTP Generator
Generate TOTP codes from a base32 secret
JSON to CSV PRO
Convert JSON arrays into export-ready CSV format
JSON Formatter
Format and beautify JSON
Markdown Cleaner PRO
Strip HTML, fix headings, normalize lists and collapse blank lines in markdown
JSON to YAML
Convert JSON documents to YAML format
URL Extractor
Extract all URLs from text
Base64 Image
Encode images to Base64 or decode Base64 to image data
Color Picker Web
Pick and analyze web colors with RGB, HSL, CMYK and WCAG info
Markdown to HTML PRO
Convert markdown documents into clean HTML output
URL Decoder
Decode URL-encoded strings
HTML Entity Converter
Convert HTML entities to characters and back
SemVer Compare
Compare two semantic versions and find the newer one
HTML to Markdown PRO
Convert HTML documents into markdown format
XML to JSON Converter
Convert XML documents to JSON format
CSS Minifier
Minify CSS code
Regex Tester
Test regular expressions
HTML Tags Remover
Remove HTML tags from text
JWT Decoder
Decode and inspect JWT tokens without validation
HTML Minifier
Minify HTML code
BBCode to HTML
Convert BBCode markup to HTML
CSS Vendor Prefixer
Add vendor prefixes to CSS properties and keyframes
SQL Formatter
Format and beautify SQL queries
CSV to JSON PRO
Convert CSV tables into structured JSON output
Cron Expression Builder
Build, validate and preview cron schedule expressions
SEO & Writing
17Robots.txt Generator
Generate robots.txt files for your website
Title Generator
Generate blog and article titles with different tones
Article Rewriter
Paraphrase and rewrite text while preserving meaning
Grammar Checker
Check grammar, style and readability of your text
Keyword Density Checker PRO
Analyze keyword frequency and density across your text
Google Index Checker
Check if your website URLs are indexed by Google
Readability Score PRO
Measure text readability using Flesch, Kincaid, ARI and Fog indices
SEO Snippet Preview PRO
Preview how your page title and description appear in Google search results
Open Graph Checker
Check Open Graph tags and social media preview
UTM Builder
Build campaign tracking URLs with UTM parameters
Plagiarism Checker
Detect text similarity and check content uniqueness
H1-H6 Checker
Check heading hierarchy in HTML and get SEO recommendations
Broken Link Checker
Check URLs for broken links and HTTP status codes
Keyword Tool
Find related keywords and analyze search volume
Duplicate Content Finder PRO
Detect repeated or near-duplicate sentences in your text
Meta Description Generator
Generate SEO-optimized meta descriptions for your pages
SERP Preview
Preview how your page appears in Google search results with SEO analysis
Generators
18Coupon Code Generator
Generate random coupon codes for promotions
Password Generator
Generate strong random passwords
Signature Generator
Draw a signature with your mouse or touchpad and download it as PNG
Username Generator
Generate unique username ideas
UUID Generator
Generate UUID v4 identifiers
Barcode Generator
Generate barcodes for products and labels
Hash Generator
Generate MD5, SHA256, SHA512 hashes
Quote Generator
Generate random inspirational quotes
Random String Generator
Generate random string with custom options
WhatsApp Link Generator
Generate a WhatsApp chat link with a pre-filled message
UUID v7 Generator
Generate time-ordered UUID v7 identifiers
QR Code Generator
Generate QR codes for links and text
Mailto Link Generator
Generate a mailto link with subject, CC, BCC and body
Domain Name Generator
Generate creative domain name ideas
Color Palette Generator
Generate beautiful color palettes from any base color
Lorem Ipsum Generator
Generate lorem ipsum placeholder text
Password Strength Checker
Check the strength and security of your password
YouTube Timestamp Link Generator
Create a YouTube link that starts at a specific time
Network & Domain
15DNS Propagation Checker PRO
Check DNS record visibility across multiple resolvers
Reverse IP Lookup
Find all domains hosted on the same IP address
HTTP Headers Inspector PRO
Inspect response headers and key security policies
MAC Address Tool
Generate, validate and reformat MAC addresses
URL Redirect Checker
Trace the full redirect chain of any URL
Email Validator
Validate email format, check domain MX records, and detect typos
SSL Certificate Checker PRO
Check certificate validity, issuer, and expiration data
DNS Lookup PRO
Query DNS records by domain (A, AAAA, MX, TXT, NS, CNAME)
Ping Tool
Simulate ping and traceroute to check network connectivity
WHOIS Lookup PRO
Get registrar, status, and expiration from WHOIS data
Domain Reputation Checker PRO
Estimate domain risk level using DNS and heuristic signals
IP Info PRO
Analyze IP type, visibility, and network flags
TCP Port Checker PRO
Check whether a TCP host:port socket is reachable
HTTP Availability Checker PRO
Measure endpoint status, response time, and redirect behavior
Traceroute Analyzer PRO
Inspect network route hops and latency to a destination host
Converters & Units
20Data Size Converter
Convert B ↔ KB ↔ MB ↔ GB
Energy Converter
Convert between Joules, calories, kWh, and BTU
Length Converter
Convert km ↔ m ↔ cm ↔ in ↔ ft
Area Converter
Convert m² ↔ km² ↔ hectares
Time Converter
Convert hours ↔ minutes ↔ seconds
Angle Converter
Convert between degrees, radians, gradians, and mils
Temperature Converter
Convert °C ↔ °F ↔ K
Number Base Converter PRO
Convert numbers between binary, octal, decimal, and hexadecimal
Data Transfer Time Estimator PRO
Estimate file transfer time based on size, speed, and overhead
Timezone Converter PRO
Convert datetime values across multiple time zones
Unix Time Converter PRO
Convert Unix timestamps to readable datetime and back
Weight Converter
Convert kg ↔ g ↔ lbs ↔ oz
Volume Converter
Convert L ↔ ml ↔ gal ↔ pt
Typography Converter
Convert between px, pt, em, rem, and percent
Speed Converter
Convert km/h ↔ m/s ↔ knots
Batch Unit Converter PRO
Convert multiple values at once across unit categories
Pressure Converter
Convert between PSI, bar, atm, Pa, and kPa
Fuel Efficiency Converter
Convert between MPG, L/100km, and km/L
Frequency Converter
Convert between Hz, kHz, MHz, and GHz
Currency Converter
Convert between currencies with live rates
Color & Image
23Luminance Calculator
Calculate relative luminance and WCAG contrast ratio between two colors
Image Resizer
Resize images to custom dimensions
CMYK to RGB Converter
Convert CMYK color values to RGB and HEX formats
Image to Grayscale
Learn about grayscale conversion methods for images
Named Colors Reference
Look up named CSS colors and their hex/RGB values
Image Enlarger
Enlarge images 2x or 4x with high-quality interpolation
Image Dimension and DPI Converter PRO
Convert between pixel dimensions and print size using DPI
ICO to PNG
Convert ICO icons to PNG format
Image Cropper
Crop images to any area
Hue & Saturation Adjuster
Adjust the hue and saturation of any color
Flip Image
Flip images horizontally or vertically
Color Blindness Simulator
Simulate how colors appear with different types of color blindness
WebP to PNG
Convert WebP images to PNG format
Aspect Ratio Calculator
Calculate aspect ratio from width and height values
Gradient Generator
Generate CSS gradient code from two colors
Image Optimizer
Compress images with adjustable quality
PMS Color Converter
Look up PMS (Pantone) colors and find CMYK/HEX values
Color Picker
View detailed color information from a hex code
Color Format Converter
Convert between HEX, RGB, HSL and HSV color formats
Contrast Checker
Check WCAG contrast ratio between two colors
Complementary Color Finder
Find complementary, triadic and split-complementary colors
Color Converter
Convert between Hex, RGB, HSL colors
Rotate Image
Rotate images by 90, 180 or 270 degrees
Finance & Money
20Home Affordability Calculator PRO
Estimate affordable home price based on income, debt, and loan terms
Currency Exchange Rate
Convert between world currencies with simulated rates
Sales Tax Calculator
Calculate price with sales tax
CPM Calculator
Calculate cost per mille for ad campaigns
Compound Interest Calculator
Calculate compound interest with year-by-year schedule
Margin Calculator
Calculate profit margin and markup
Inflation Calculator
Calculate adjusted value for inflation over time
Mortgage Calculator
Calculate monthly payments with amortization schedule
Loan Payment Calculator PRO
Calculate monthly payment, interest, and total loan cost
Monthly Budget Planner PRO
Plan monthly income, expenses, and savings goals
Savings Goal Calculator PRO
Estimate months to reach a savings target with contributions and interest
Discount Calculator
Calculate discounts and sales
Debt Payoff Planner PRO
Build a debt-free roadmap using avalanche or snowball repayment strategy
VAT Number Validator
Validate EU VAT numbers with checksum verification
Grocery Budget Optimizer PRO
Optimize food spending with weekly limits and category allocation
IBAN Validator
Check IBAN format, country and mod-97 checksum
Subscription Cost Tracker PRO
Track recurring subscriptions with monthly and yearly cost insights
Emergency Fund Calculator PRO
Calculate emergency fund targets and timeline based on expenses
Rent vs Buy Calculator PRO
Compare long-term rent and home ownership costs with equity impact
ROI Calculator
Calculate return on investment with benchmarks comparison
Health & Food
14Ideal Weight Calculator
Calculate ideal body weight using Devine and Robinson formulas
BMI Calculator
Calculate Body Mass Index
Calories Burned
Estimate calories burned during different activities
Body Fat Calculator
Estimate body fat percentage using measurements
Blood Alcohol Calculator
Estimate your blood alcohol content (BAC)
Meal Planner
Plan weekly meal schedule
Nutrition Facts
Nutrition information reference
BMI Index Calculator
Calculate BMI with detailed categories and health risk
Spice Reference
Spice dosages and substitutions
Cooking Time
Calculate cooking times for dishes
Calorie Calculator
Calculate calories in food
Recipe Converter
Convert cups ↔ grams for recipes
Pregnancy Due Date Calculator
Calculate estimated due date and track pregnancy progress
Recipe Scaler
Scale recipe ingredients up or down
Home & Daily Life
14Pet Age Calculator
Calculate your pet's age in human years
Furniture Assembly Time
Estimate time needed to assemble furniture
Moving Cost Calculator
Estimate moving costs with breakdown of fees
Timer Tool
Calculate countdown and stopwatch time information
Utility Bill Splitter PRO
Split utility bills equally or by custom participant weights
Calendar Generator
Generate a printable calendar for any month and year
Habit Tracker
Plan and schedule your new habit
Packing List Generator
Generate a complete packing list for your trip
To-Do List Generator
Generate organized to-do lists from task descriptions
Caffeine Calculator
Calculate safe caffeine intake based on your weight
Shopping List
Generate shopping list from ingredients
Sleep Cycle Calculator
Calculate optimal sleep and wake times
Water Intake Tracker
Calculate your daily water intake goal
Gift Idea Generator
Get personalized gift suggestions for any occasion
Construction & Building
20Paint and Plaster Estimator PRO
Estimate paint and plaster quantities plus optional material costs
Tile Layout Calculator PRO
Plan tile layout and quantity with grout and waste allowance
Concrete Mix Calculator
Calculate concrete mix proportions
Wiring Calculator
Calculate wire size by power
Stairs Calculator
Calculate stairs dimensions
Paint Calculator
Calculate paint needed for surfaces
Material Weight
Calculate material weights
Cable Load Estimator PRO
Estimate load current, recommended cable section and voltage drop
Window & Door Fit Calculator PRO
Check whether a window or door unit fits an opening with clearances
Room Material Estimator PRO
Estimate paint, flooring and tile box quantities for a room
Foundation Volume Estimator PRO
Estimate concrete volume for slab, strip or column foundations with waste
Construction Budget
Estimate construction costs
Area Calculator
Calculate area for various shapes
Brick Calculator
Calculate bricks/blocks needed
Pipe Size Helper PRO
Estimate recommended pipe diameter and pressure drop from flow requirements
Insulation Calculator
Calculate insulation requirements
Renovation Cost Breakdown PRO
Build a detailed renovation budget by area, labor, materials and contingency
Flooring Quantity Calculator PRO
Estimate planks, boxes and total flooring cost with waste allowance
Roof Material Estimator PRO
Estimate roof sheets quantity and cost with pitch and waste allowance
Volume Calculator
Calculate volume for materials
Math & Calculators
23Standard Deviation
Calculate the standard deviation and variance of a data set
Probability Calculator
Calculate intersection, union and conditional probabilities
Percentage Calculator
Calculate what percentage one number is of another
Percentage Change Calculator
Calculate percentage increase or decrease between two values
Age Calculator
Calculate exact age in years, months and days
Mean, Median & Mode
Calculate the mean, median and mode of a number set
Roman Numeral Converter
Convert between numbers and Roman numerals
Fraction Calculator
Simplify fractions and convert to decimals
Unit Circle Calculator
Calculate sin, cos, tan and other trigonometric values for any angle
Factorial Calculator
Calculate the factorial of a number
Prime Number Checker
Check if a number is prime and find its factors
Coin Flip Simulator
Virtual coin flip with statistics and streak tracking
VAT Calculator
Add or remove VAT from a price
Binary Converter
Convert between binary, octal, decimal and hexadecimal number systems
Exponent Calculator
Calculate powers and roots of numbers
Tip Calculator
Calculate tip amount and split the bill
Date Difference
Calculate days between two dates
Confidence Interval Calculator
Calculate confidence intervals for a sample mean
Random Number Generator
Generate random numbers within a range, multiple at once
Dice Roller
Roll multiple dice of various types (d4, d6, d8, d10, d12, d20, d100)
Ratio Calculator
Simplify ratios and find missing proportion values
Pythagorean Theorem Calculator
Solve a² + b² = c² for right triangles
GCF & LCM Calculator
Find the greatest common factor and least common multiple