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📝 Text Tools 0
Base64 Encoder/Decoder
Free online Base64 encoder and decoder. Encode text to Base64 or decode Base64 back to text instantly in your browser.
Case Converter
Free online case converter. Convert text to uppercase, lowercase, title case, sentence case, and more instantly in your browser.
Character Counter
Free online character counter. Count characters (with and without spaces), letters, words, sentences, and lines in real-time. Perfect for social media, essays, and SEO.
Markdown Editor
Free online markdown editor with live preview. Write markdown and see formatted HTML output instantly. Perfect for developers and writers.
Number to Words
Free online number to words converter. Convert any number to written English words instantly. Perfect for checks, invoices, legal documents, and educational use.
Text Diff Checker
Free online text diff checker. Compare two texts and find differences instantly. Perfect for developers, writers, and editors.
Text Repeater
Free online text repeater. Repeat any text, word, or character multiple times with custom separator. Perfect for testing, filler text, formatting, and generating repeated patterns.
URL Encoder/Decoder
Free online URL encoder and decoder. Encode text for URLs and decode URL-encoded strings instantly in your browser.
Word Counter
Free online word counter tool. Count words, characters, sentences, paragraphs, and estimate reading time instantly. No signup required.
💻 Developer Tools 0
Color Converter
Free online color converter. Convert colors between HEX, RGB, HSL, and CMYK formats instantly. Includes color picker and live preview. Perfect for web designers and developers.
Color Picker
Free online color picker. Pick colors from a visual palette, get HEX, RGB, and HSL values instantly. Perfect for designers and developers.
CSS Minifier
Free online CSS minifier. Compress and minify your CSS by removing whitespace, comments, and unnecessary characters. Reduce stylesheet size and improve page speed.
Hash Generator
Free online hash generator. Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text instantly in your browser. No server uploads.
HTML Minifier
Free online HTML minifier. Compress and minify your HTML code by removing whitespace, comments, and unnecessary characters. Reduce page size and improve load speed.
HTTP Status Code Lookup
Look up HTTP status codes quickly. Browse all standard HTTP response codes with descriptions and categories. Free HTTP status code reference for developers and SEOs.
JS Minifier
Free online JavaScript minifier. Compress and minify your JS code by removing whitespace, comments, and unnecessary characters. Reduce script size and improve load time.
JSON Formatter
Free online JSON formatter and validator. Format, beautify, minify, and validate your JSON data instantly in your browser.
Password Generator
Generate strong, secure random passwords with our free password generator tool. Customizable length, symbols, numbers, and more. No signup required.
SQL Formatter
Free online SQL formatter. Beautify and format your SQL queries with customizable indentation. Supports SELECT, INSERT, UPDATE, DELETE, and DDL statements.
SSL Certificate Checker
Check SSL/TLS certificate for any domain. Quick links to SSL Labs, SSL Shopper, and other SSL testing tools. Includes OpenSSL command generator. Free SSL checker.
Timestamp Converter
Free online timestamp converter. Convert Unix timestamps to human-readable dates and dates to Unix timestamps instantly in your browser.
YAML to JSON Converter
Free online YAML to JSON converter. Instantly convert YAML to JSON or JSON to YAML. Supports nested objects, arrays, and complex structures. No upload needed.
❤️ Health Calculators 0
BMI Calculator
Free online BMI calculator. Calculate your Body Mass Index instantly. Supports imperial (lbs/ft) and metric (kg/cm). Includes BMI categories and healthy weight range.
BMI Prime Calculator
Calculate BMI and BMI Prime — the ratio of your BMI to the normal upper limit. BMI Prime of 1.0 or less means healthy. Free online BMI Prime calculator.
BMR Calculator
Free online BMR calculator. Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation. Find your maintenance calories for weight management.
Body Fat Calculator
Free online body fat calculator. Estimate your body fat percentage using measurements or the US Navy method. Track your fitness progress.
Calorie Calculator
Free online calorie calculator. Calculate your daily calorie needs based on age, height, weight, activity level, and fitness goals. Includes macro breakdown.
Macro Calculator
Calculate your daily macronutrient needs — protein, carbs, and fat — based on BMR, activity level, and weight goal. Free macro calculator for diet planning.
Pregnancy Due Date Calculator
Free online pregnancy due date calculator. Estimate your due date based on last menstrual period or conception date. See weekly pregnancy timeline.
Sleep Cycle Calculator
Calculate optimal bedtime or wake-up time based on 90-minute sleep cycles. Wake up refreshed at the end of a cycle. Free sleep cycle calculator.
Water Intake Calculator
Free online water intake calculator. Calculate how much water you should drink daily based on your weight, activity level, and climate. Stay hydrated.
🏗️ Construction Calculators 0
Brick Calculator
Free online brick calculator. Estimate how many bricks, blocks, or pavers you need for a wall or patio. Supports standard sizes and custom dimensions.
Concrete Calculator
Free online concrete calculator. Calculate how much concrete you need in cubic yards, cubic feet, and number of bags. Perfect for slabs, footings, and columns.
Flooring Calculator
Free online flooring calculator. Calculate how much flooring material you need in sq ft or sq m. Supports rectangles, L-shaped rooms, and includes waste allowance.
Paint Calculator
Free online paint calculator. Calculate how many gallons of paint you need for walls, ceilings, and trim. Accounts for windows, doors, and multiple coats.
Rebar Calculator
Free online rebar calculator. Calculate number of rebar bars needed, total length, and estimated weight for slabs, walls, and footings. Works in feet and meters.
Roofing Calculator
Free online roofing calculator. Calculate roof squares, shingle bundles, underlayment rolls, and ridge cap for your roofing project. Supports multiple pitch angles.
Stair Calculator
Free online stair calculator. Calculate number of treads, riser height, total run, and stringer length for your staircase. Follows building code guidelines.
🔄 Generators & Converters 0
Binary Converter
Free online binary converter. Convert between binary, decimal, hexadecimal, and octal number systems instantly. Perfect for programmers and students.
Hex Converter
Free online hexadecimal converter. Convert hex to decimal, decimal to hex, hex to text, text to hex, hex to ASCII, and more. Perfect for developers and network engineers.
Image Resizer
Free online image resizer. Resize JPG, PNG, GIF images to any dimensions right in your browser. No uploads, completely private.
Percentage Calculator
Free online percentage calculator. Calculate percentages, find what percent one number is of another, and compute percentage changes instantly.
QR Code Generator
Generate free QR codes for URLs, text, and more. Download QR codes as PNG images. No signup, no limits, 100% free.
Unit Converter
Free online unit converter. Convert between units of length, weight, temperature, area, and volume instantly in your browser.
📡 CCTV & Security 0
ANPR Range Calculator
Calculate maximum ANPR camera range based on resolution, sensor size, lens focal length, and plate size. Free online LPR distance calculator for security camera installers.
Bandwidth Calculator
Free online bandwidth calculator for IP camera systems. Calculate total network bandwidth required for N cameras based on resolution, FPS, and compression. Plan your network infrastructure.
Camera FOV Calculator
Free online camera FOV calculator. Calculate horizontal and vertical field of view for security cameras based on sensor size and focal length. Plan camera placement and coverage.
CCTV Storage Calculator
Free online CCTV storage calculator. Calculate how many days of recording you need, total storage required, and recommended HDD size based on cameras, resolution, fps, and retention.
Minimum Illumination Calculator
Check if your security camera's minimum illumination rating is sufficient for your scene. Free lux calculator for CCTV installers comparing camera specs to real-world lighting.
PoE Calculator
Free online PoE power budget calculator. Calculate total power draw for PoE devices, check switch capacity, and determine PoE class requirements for IP cameras and network devices.
RAID Storage Calculator
Free online RAID storage calculator. Calculate usable capacity for RAID 0, 1, 5, 6, and 10 configurations. Enter drive count and size to see total, usable, and fault tolerance.
UPS Runtime Calculator
Free online UPS runtime calculator for security systems. Estimate battery backup time for NVR, cameras, and network equipment. Calculate total load and recommended UPS capacity.
Video Bitrate Calculator
Free video bitrate calculator. Estimate file size, bandwidth, and storage for any resolution, FPS, and codec. Supports H.264, H.265, H.265+, VP9, and AV1.
🕸️ Network Tools 0
Bandwidth Converter
Free online bandwidth and data rate converter. Convert between Mbps, Gbps, MB/s, GB/s, Kbps, and more. Ideal for network planning and bandwidth calculations.
IP Range Calculator
Calculate network address, broadcast address, usable host range, subnet mask, and total hosts from any IPv4 CIDR notation. Free online subnet calculator for network engineers.
MAC Address Lookup
Free online MAC address vendor lookup. Enter any MAC address to identify the manufacturer. Search by OUI (first 6 hex digits) to find device vendor information.
Port Number Lookup
Free online port number lookup. Search common TCP and UDP port numbers. Quick reference for well-known ports used by HTTP, HTTPS, SSH, FTP, DNS, DHCP, and more.
Subnet Calculator
Free online subnet calculator. Calculate network address, broadcast address, usable host range, subnet mask, and total hosts from any IP/CIDR notation. IPv4 supported.
🕓 Time & Date 0
Age Calculator
Free online age calculator. Calculate your exact age in years, months, days, hours, minutes, and seconds instantly. Also find age on any future or past date.
Countdown Timer
Free online countdown timer. Count down days, hours, minutes, and seconds to any date or event. Set a target date and watch the countdown in real-time.
Date Difference Calculator
Free online date difference calculator. Calculate exact days, months, years between two dates. Includes business days, weekdays, weekends, and duration breakdown.
Stopwatch
Free online stopwatch. Measure elapsed time with start, stop, lap, and reset controls. Record lap times and copy results. No signup required.
Timer Countdown
Free online countdown timer. Set hours, minutes, and seconds. Includes alarm sound when time is up. Perfect for cooking, workouts, study sessions, and productivity.
Timezone Converter
Free online timezone converter. Convert time between any two timezones worldwide. Supports major cities, UTC offsets, and DST. Plan meetings across timezones.
🛠 Developer Utilities 0
Cron Expression Generator
Generate cron expressions visually with presets and next-run preview. Free online cron expression generator for developers, sysadmins, and DevOps.
HTML Entity Encoder Decoder
Free HTML entity encoder and decoder. Convert special characters to HTML entities and decode entities back to readable text. Useful for escaping HTML in code snippets.
List Randomizer
Free online list randomizer. Enter items, shuffle them randomly, or pick a random item from your list. Perfect for giveaways, raffles, and decision making.
List Sorter
Free online list sorter. Sort lists alphabetically (A-Z, Z-A), numerically, with options for unique values and reverse order. Perfect for organizing data, cleaning lists, and sorting items.
Lorem Ipsum Generator
Free online Lorem Ipsum generator. Generate dummy text by words, sentences, or paragraphs. Ideal for mockups, wireframes, and design prototypes.
Password Strength Checker
Free online password strength checker. Analyze password security with real-time strength meter, character analysis, entropy calculation, and improvement suggestions.
Random Number Generator
Free online random number generator. Generate random numbers within any range, with options for count, unique values, and sorted output. Perfect for lotteries, giveaways, and testing.
Regex Tester
Test and debug regular expressions in real-time. Supports flags, capture groups, global matching, and string replacement. Free online regex tester for developers.
UUID Generator
Free online UUID generator. Generate random UUID v4 and time-ordered UUID v7 identifiers. Copy to clipboard, bulk generate multiple UUIDs instantly.
🔢 Math & Geometry 0
Area & Volume Calculator
Free online area and volume calculator. Calculate area of squares, rectangles, circles, triangles. Calculate volume of cubes, spheres, cylinders, cones. Fast geometry calculations.
Fraction Calculator
Free online fraction calculator. Add, subtract, multiply, and divide fractions. Simplify fractions, convert between improper and mixed numbers. Step-by-step results.
Percentage Calculator
Free online percentage calculator. Calculate percentage of a number, percentage change, percentage difference, and more. Fast and accurate percentage calculations.
Prime Number Checker
Free online prime number checker. Check if any number is prime, find all prime factors, and list primes in a range. Fast primality testing for integers.
💰 Finance Calculators 0
Compound Interest Calculator
Free online compound interest calculator. Calculate simple and compound interest with monthly contributions, yearly breakdown, and final balance. Works in your browser.
Discount Calculator
Free online discount and sale price calculator. Calculate savings, final price after discount, and discount percentage. Perfect for shopping deals.
Electricity Bill Calculator
Estimate your monthly electricity bill. Add appliances to calculate kWh consumption, or enter manually. Uses slab-based or custom rate pricing. Free electricity bill calculator.
EMI Calculator
Free online EMI calculator for home loans, car loans, personal loans. Calculate monthly EMI, total interest, and payment schedule with amortization table.
Fuel Cost Calculator
Calculate fuel cost for any trip distance. Enter fuel efficiency, price, and distance to get total cost, fuel needed, and monthly commute expenses. Free fuel cost calculator.
Loan Calculator
Calculate monthly EMI, total interest, and total payment for any loan. Includes amortization schedule and interest-only option. Free online loan calculator.
ROI Calculator
Free online ROI calculator. Calculate return on investment, total profit, and ROI percentage. Perfect for evaluating investment performance and business decisions.
Tip Calculator
Free online tip calculator. Calculate tip amount, total bill, and split between multiple people. Perfect for restaurants, group dinners, and service tips.
🔄 Unit Converters 0
Area Converter
Free online area converter. Convert between square meters, acres, hectares, square feet, square miles, and more. Fast and accurate area conversion.
Data Storage Converter
Free online data storage converter. Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and more. Fast and accurate digital storage conversion.
Length Converter
Free online length converter. Convert between meters, kilometers, miles, feet, inches, centimeters, yards, and more. Fast and accurate length conversion.
Mass Converter
Free online mass and weight converter. Convert between kilograms, grams, pounds, ounces, tons, and more. Fast and accurate weight conversion.
Speed Converter
Free online speed converter. Convert between km/h, mph, m/s, knots, and more. Fast and accurate speed conversion tool.
Temperature Converter
Free online temperature converter. Convert between Celsius, Fahrenheit, and Kelvin. Fast and accurate temperature conversion tool.
Volume Converter
Free online volume converter. Convert between liters, gallons, quarts, cups, milliliters, cubic meters, and more. Fast and accurate volume conversion.
🔍 SEO Tools 0
Google Cache Checker
Check if a page is cached by Google. Generate Google Cache URLs for any webpage with quick links to cached, web, and text-only versions. Free cache checker tool.
Heading Analyzer
Free online heading analyzer. Analyze H1-H6 heading structure from HTML or plain text content. Check heading hierarchy, duplicates, missing levels, and SEO heading best practices.
HTML Sitemap Generator
Free online HTML sitemap generator. Create an HTML sitemap with grouped links for your visitors. Perfect for improving site navigation and user experience.
Keyword Density Checker
Free online keyword density checker. Analyze text content for keyword frequency, density percentage, 2-gram and 3-gram phrases. Perfect for SEO content optimization.
Meta Tag Generator
Free online meta tag generator. Generate meta title, description, keywords, Open Graph, Twitter Card tags with live preview. Copy ready-to-use HTML meta tags.
Open Graph Preview
Preview how your page looks when shared on Facebook, LinkedIn, Slack, and Twitter. Test Open Graph meta tags (og:title, og:description, og:image) for social sharing. Free OG preview tool.
Readability Score
Check readability of any text with Flesch Reading Ease score and Flesch-Kincaid grade level. Free online readability checker for writers, bloggers, and SEO professionals.
Robots.txt Generator
Free online robots.txt generator. Create robots.txt files with allow/disallow rules, sitemap references, crawl delay, and user-agent directives. Copy ready-to-use robots.txt.
SERP Preview Tool
Preview how your page will look in Google search results. Test title tags and meta descriptions with live character count and truncation warnings. Free SERP preview tool.
Sitemap Generator
Free online XML sitemap generator. Create XML sitemaps from a list of URLs with optional priority, changefreq, and lastmod settings. Copy ready-to-use sitemap XML.