Free Online Calculators & Developer Tools

Binary Converter

Free online binary converter. Easily switch between binary, decimal, hex, and plain text. Essential tool for computer science students and developers.

Decimal to Fraction Converter

Free online decimal to fraction converter. Transform any decimal number into a simplified proper or mixed fraction instantly. Fast, accurate, and secure.

Discount & Sales Tax Calculator

Free online discount calculator. Calculate final price after multiple discounts and sales tax. See exactly how much you save while shopping.

Equation Solver

Free online equation solver. Solve quadratic equations (axВІ + bx + c = 0) and linear equations instantly with step-by-step logic.

Fraction to Decimal Calculator

Convert any fraction to a decimal instantly. Supports proper, improper, and mixed fractions. Perfect for students and professionals.

GPA Calculator

Free online GPA calculator. Supports weighted and unweighted GPA based on 4.0 scale. Calculate your semester or cumulative grades easily.

Percentage Calculator

Free online percentage calculator. Calculate percentages, percentage change, increase, decrease, and more. Fast, easy, and accurate.

Roman Numerals Converter

Free online Roman numerals converter. Convert standard numbers to Roman numerals and back instantly. Perfect for dates, history, and learning.

Standard Deviation Calculator

Free online standard deviation calculator. Calculate population and sample standard deviation, variance, and mean for any data set instantly.

Z-Score Calculator

Calculate Z-scores instantly with our free online calculator. Includes step-by-step formula explanation, standard deviation, and mean calculations.

Case Converter

Free online case converter. Quickly change between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and more.

Column Extractor

Extract specific columns from delimited text, CSV, or TSV data instantly. Fast, secure, and browser-based data processing.

CSV to Markdown Converter

Convert CSV data to Markdown tables instantly. Perfect for GitHub documentation, README files, and technical blogs.

Duplicate Line Remover

Remove duplicate lines from any text or list instantly. Includes options for case sensitivity, whitespace trimming, and alphabetical sorting.

Email Extractor

Quickly extract all unique email addresses from any block of text or document. Fast, secure, and 100% private extraction in your browser.

Emoji Keyboard

Free online emoji keyboard. Easily find, search, and copy-paste emojis for your social media, blog, or messages. Works on all devices.

Fancy Text Generator & Cool Fonts

Transform your text into cool, stylish fonts with our Fancy Text Generator. Copy and paste stylish fonts for Instagram, Facebook, Twitter, and more.

Instagram Character Counter

Check your Instagram caption and bio length online. Stay within the 2200-character limit for captions and 150-character limit for bios.

LinkedIn Character Counter

Check your LinkedIn post, headline, and about section length. Ensure your professional profile is perfectly optimized for the 3000-character post limit.

List Alphabetizer

Quickly sort any list of names, items, or keywords alphabetically, numerically, or randomly. Free online list sorter with multiple options.

List Difference & Intersection

Compare two lists online to find differences, common items (intersection), and unique elements. Fast, secure, and works entirely in your browser.

Lorem Ipsum Generator

Free online Lorem Ipsum generator. Generate paragraphs, sentences, or words of placeholder text for your design and development projects.

Markdown to CSV Converter

Easily convert Markdown tables to CSV files. Perfect for extracting data from README files and documentation into Excel or Google Sheets.

Markdown to HTML Converter

Convert Markdown to clean, semantic HTML instantly. A free online tool with live preview and custom options. Works entirely in your browser.

Readability Score Calculator

Analyze the readability of your text with our free online calculator. Get Flesch-Kincaid, Gunning Fog, and other readability scores instantly.

Slug Generator

Convert titles and text into clean, SEO-friendly URL slugs. Supports transliteration, lowercase forcing, and custom separators.

Text Repeater

Free online text repeater tool. Repeat any text, string, or emoji multiple times instantly. Fast, secure, and easy to use.

Text Reverser

Instantly reverse characters, words, or lines in any text. A fast and free tool for creative writing, coding, and data manipulation.

Text to Speech

Listen to your text with our free online text-to-speech tool. Multiple voices and languages supported. Perfect for accessibility and content creators.

Twitter Character Counter

Free online Twitter character counter. Check if your tweet fits the 280-character limit. Includes space for links and images.

Word Cloud Generator

Create beautiful word clouds from any text instantly. Analyze word frequency, exclude common words, and download high-quality visualizations.

Word Counter

Free online word counter. Count words, characters, sentences, and paragraphs in real-time. Calculate reading and speaking time.

Word Frequency Counter

Free online tool to count word frequency in text. Filter stop words, sort results, and analyze your content for SEO and readability.

Words to Minutes Calculator

Calculate how long it takes to read or speak your text. Accurate estimates for speeches, presentations, and blog posts based on words per minute (WPM).

Age Calculator

Free online age calculator. Find out exactly how old you are in years, months, days, hours, and even seconds. Calculate the time between two dates.

Date Calculator

Free online date calculator. Add or subtract days, weeks, months, or years to any date. Find the exact date after a specific time interval.

Day Counter

Calculate how many days are left until a specific date or how many days have passed. Perfect for tracking birthdays, holidays, or deadlines.

Days Between Dates

Free online tool to calculate the number of days, weeks, months, and years between two dates. Perfect for planning and countdowns.

Dog Age Calculator

Calculate your dog's age in human years accurately with our free tool. Accounts for dog size and breed-specific aging rates.

Event Countdown

Create a custom countdown timer for any special event. Track days, hours, and minutes until your birthday, wedding, or next big holiday.

Running Pace Calculator

Calculate the required pace for your next marathon or half-marathon. Easy-to-use running calculator with support for both kilometers and miles.

Base64 to File Converter

Free online Base64 to file converter. Decode any Base64 string back into its original file format (PDF, DOCX, ZIP, etc.). Secure and private client-side tool.

Base64 to Image Converter

Convert Base64 strings or Data URIs back into image files. Preview your images and download them as PNG or JPG instantly. Secure client-side tool.

Color Palette Extractor

Free online tool to extract color palettes from images. Upload any photo and get HEX, RGB, and HSL color codes instantly.

EXIF Data Remover

Protect your privacy by removing EXIF metadata from your photos. Strip GPS location, camera settings, and timestamps before sharing online. 100% private.

EXIF Data Viewer

Free online EXIF data viewer. Inspect hidden metadata in your photos: camera model, GPS coordinates, shutter speed, and more. Secure, browser-based tool.

Image Compressor

Free online image compressor. Reduce file size of your images without losing quality. Support for PNG, JPG, and WEBP. Secure and private.

Image to Base64 Converter

Convert any image (PNG, JPG, SVG, WebP) into a Base64 string or Data URI instantly. Perfect for embedding images directly into HTML or CSS.

Image to PDF Converter

Convert your images (JPG, PNG, WebP) to PDF documents instantly. Adjust page orientation and margins. Secure, client-side processing.

Markdown to PDF

Convert your Markdown files to professional PDF documents instantly. A fast, secure, and free online tool that works entirely in your browser with live preview.

PDF Merger

Easily combine multiple PDF files into a single document. Secure, fast, and processed entirely in your browser. No registration required.

PDF Page Deleter

Free online tool to delete pages from PDF files. Simply upload your PDF, select the pages you want to remove, and download the new document. Secure and private.

PDF to Images Converter

Free online tool to convert PDF pages into high-quality images (JPG or PNG). Perfect for presentations, social media, or sharing documents as photos.

PDF to Text

Extract text from PDF documents instantly. A fast, secure, and free online tool that works entirely in your browser. No file uploads required.

SVG to PNG Converter

Convert SVG files to high-quality PNG images instantly. Our free online converter works entirely in your browser for maximum privacy and speed.

.gitignore Generator

Generate professional .gitignore files for your projects instantly. Supports Node.js, Python, Go, Java, C++, and many more environments. Free and secure.

Aspect Ratio Calculator

Free online aspect ratio calculator. Calculate missing dimensions for images or videos while maintaining proportions. Support for common ratios like 16:9, 4:3.

Base64 Encode & Decode

Free online Base64 encoder and decoder. Convert text to Base64 and Base64 back to text instantly. Perfect for developers and data processing.

Color Converter (Hex/RGB/HSL)

Convert colors between HEX, RGB, and HSL formats instantly. Preview colors and find perfect matches for your web design projects.

Crontab Explainer

Translate complex cron expressions into plain English. Free online tool to decode crontab syntax for schedules and automation.

Crontab Generator

Free online crontab generator. Create cron job schedules visually without memorizing the syntax. Perfect for Linux sysadmins and web developers.

CSS Box Shadow Generator

Create beautiful CSS box shadows with our free visual generator. Adjust offset, blur, spread, and color to get the perfect shadow for your website.

CSS Gradient Generator

Free online CSS gradient generator. Create complex linear and radial gradients visually. Copy clean CSS code for your web design projects instantly.

CSS Minifier

Compress and minify your CSS files instantly. Reduce file size and improve website loading speed with our free online CSS compressor.

CSV to JSON Converter

Free online CSV to JSON converter. Transform your spreadsheet data into clean JSON arrays instantly. Perfect for web development and data migrations.

CSV to YAML Converter

Free online CSV to YAML converter. Transform your CSV data into clean, structured YAML format instantly. Perfect for configuration files and data processing.

CURL to Fetch/Axios Converter

Free online tool to convert CURL commands to JavaScript Fetch or Axios code. Simplify your API integration and debugging.

Docker Dockerfile Generator

Generate optimized, secure, and production-ready Dockerfiles for various frameworks and languages including Node.js, Python, Go, and more.

HTML Entities Encoder/Decoder

Free online tool to encode and decode HTML entities. Convert special characters to HTML entities or back to plain text instantly.

HTML Formatter & Minifier

Free online HTML formatter and minifier. Clean up messy HTML code or compress it for better performance. Fast, secure, and purely client-side.

HTML Minifier

Reduce the size of your HTML documents with our free online minifier. Remove comments and whitespace to improve page load speed.

HTML to JSX / React Converter

Convert HTML code to JSX for React components instantly. A free online tool for developers to transform HTML attributes like class to className and style strings to objects.

HTML to Markdown Converter

Convert HTML code to Markdown instantly. Perfect for migrating blog posts, cleaning up web content, or documentation. Secure client-side processing.

HTTP Status Codes Checker

Comprehensive list of HTTP status codes, their meanings, and descriptions. Find explanations for 1xx, 2xx, 3xx, 4xx, and 5xx response codes.

JavaScript Minifier

Compress your JavaScript files with our free online minifier. Remove comments and spaces to reduce script size and speed up your web apps.

JS Console Beautifier

Generate beautiful, styled console.log statements for your JavaScript applications. Create banners, status messages, and more with custom CSS styles.

JSON Beautifier & Formatter

Free online JSON beautifier and formatter. Make your messy JSON code readable, valid, and structured. Supports indentation and minification.

JSON Minifier & Compressor

Free online JSON minifier. Remove unnecessary whitespace and newlines from your JSON code to reduce file size. Perfect for web performance optimization.

JSON Schema Generator

Generate a JSON Schema from a JSON object instantly. Simplify your API development and data validation with our free online tool.

JSON to CSV Converter

Free online JSON to CSV converter. Turn complex JSON objects and arrays into flat CSV files for Excel, Google Sheets, or data analysis.

JSON to TOML / TOML to JSON

Convert JSON to TOML or TOML to JSON instantly. A free online tool for developers to switch between configuration formats easily and securely.

JSON to TypeScript Interface Converter

Convert JSON objects to TypeScript interfaces instantly. Supports nested objects, arrays, and complex structures. Free developer tool.

JSON to XML Converter

Free online JSON to XML converter. Transform JSON objects into well-formatted XML documents instantly. Fast, secure, and purely client-side tool.

JWT Decoder

Decode and inspect JSON Web Tokens (JWT) online. View header, payload, and signature data instantly. Secure, client-side decoding for developers.

JWT Generator

Generate test JWT tokens with custom payloads and secrets. Secure, client-side JSON Web Token creator for developers.

List to JSON Array

Free online tool to convert a newline-separated list into a clean JSON or JavaScript array. Support for quotes, escaping, and formatting. Perfect for developers.

Luhn Algorithm Checker

Free online Luhn algorithm validator. Check if a credit card number, IMEI, or ID number is valid according to the ISO/IEC 7812 standard.

Markdown Previewer

Free online Markdown editor and previewer. Write Markdown and see the rendered HTML instantly. Export to HTML or copy for your website.

Placeholder Image Generator

Generate custom placeholder images for your web design projects. Choose size, colors, text, and format instantly. Perfect for web development.

Random String Generator

Create secure random strings, passwords, and API keys instantly. Fully customizable character sets and length. Secure and client-side.

Random User Generator

Free online random user generator. Create fake identities with names, emails, addresses, and usernames for testing and development. 100% free.

RegEx Tester

Free online RegEx tester and debugger. Test your regular expressions in real-time with highlighting and match details. Supports global, case-insensitive, and multiline flags.

SHA/MD5 Hash Generator

Generate SHA-256, SHA-1, and MD5 hashes from any text. Secure, fast, and processed entirely in your browser.

SQL Formatter

Free online SQL formatter. Beautify, format, and clean your SQL queries instantly. Supports multiple SQL dialects including MySQL, PostgreSQL, and SQL Server.

SQL to JSON / JSON to SQL Converter

Convert SQL insert statements to JSON and JSON to SQL queries instantly. A free online tool for developers to transform data between SQL and JSON formats.

Tailwind CSS Grid Generator

Build complex CSS Grid layouts instantly with our Tailwind Grid Generator. Visual editor, real-time preview, and ready-to-use Tailwind classes.

Text Diff Checker

Free online text comparison tool. Compare two strings or documents and highlight differences instantly. Perfect for code reviews and proofreading.

TOML to YAML Converter

Convert TOML to YAML instantly with our free online tool. Reliable and secure client-side converter for developers.

Unix Timestamp Converter

Free online Unix timestamp converter. Convert epoch seconds or milliseconds to human-readable dates and back. Perfect for developers and system admins.

URL Encoder/Decoder

Free online tool to encode and decode URLs. Convert special characters into %-encoded format and back to human-readable text.

UUID Generator

Free online UUID (Universally Unique Identifier) generator. Generate multiple Version 4 UUIDs instantly for your development projects.

XML Formatter

Free online XML formatter and beautifier. Make your XML code readable with custom indentation. Works entirely in your browser.

XML to JSON Converter

Free online XML to JSON converter. Transform complex XML documents into clean JSON objects instantly. Perfect for API integration and data processing.

YAML Converter

Free online tool to convert YAML to JSON and JSON to YAML. Fast, accurate, and easy-to-use transformer for developers and DevOps.

YAML to TOML Converter

Convert YAML to TOML instantly with our free online tool. Safe, client-side conversion for your configuration files.

Keyword Density Analyzer

Free online keyword density analyzer. Check word frequency, find over-optimized keywords, and analyze 1-3 word phrases in your text for better SEO.

Meta Tag Generator

Generate SEO-friendly meta tags for your website. Includes Open Graph and Twitter card support. Free tool for better search visibility.

Open Graph Generator

Create perfect Open Graph meta tags for Facebook, LinkedIn, and Pinterest. Preview how your website will look when shared on social media.

QR Code Generator

Create high-quality, custom QR codes for URLs, text, Wi-Fi, and more. Free online generator with color and size options. No registration required.

Robots.txt Generator

Free online Robots.txt generator. Create, optimize, and validate your robots.txt file to guide search engine crawlers and improve your website SEO.

Robots.txt Validator

Free online Robots.txt validator and tester. Check your robots.txt syntax, identify errors, and test URLs against your directives.

Sitemap XML Validator

Free online Sitemap validator. Paste your XML sitemap to check for syntax errors, broken links, and Google Search Console compliance.

Stop Words Remover

Remove common stop words from your text or keyword lists instantly. Optimize your content for SEO and data analysis with our free online tool.

URL Parser & UTM Decoder

Deconstruct any URL into its components: protocol, domain, path, and query parameters. Decode UTM tags and other URL variables instantly.

UTM Tag Generator

Create tracking URLs with UTM parameters easily. Support for Campaign Source, Medium, Name, Term, and Content. Perfect for Google Analytics.

XML Sitemap Generator

Free online sitemap generator. Create a professional XML sitemap for your website manually by entering URLs. Perfect for small sites and SEO optimization.

Air Fryer Calculator

Convert traditional oven recipes to air fryer settings instantly. Adjust temperature and cooking time for perfect results.

Aquarium Volume & Stocking Calculator

Calculate the volume of your aquarium and estimate how many fish you can safely keep. Supports rectangular, bow-front, and cylinder tanks.

Business Name Generator

Struggling for a brand name? Our free business name generator creates unique, memorable, and catchy name ideas based on your keywords.

Cooking Units Converter

Convert between common cooking measurements like cups, grams, milliliters, and spoons. Perfect for scaling recipes and international cooking.

Dice Roller

Free online dice roller. Roll d6, d20, and custom dice. Perfect for board games, role-playing, and random decision making. Fair and random.

Electricity Cost Calculator

Calculate the electricity cost of running your household appliances. Estimate daily, monthly, and yearly expenses based on wattage and local rates.

Fuel Cost Calculator

Calculate the total fuel cost for your trip. Enter distance, fuel efficiency, and gas price to estimate your travel expenses. Perfect for road trips.

Garden Plant Spacing Calculator

Calculate how many plants you need for your garden bed based on spacing requirements. Plan your vegetable garden with ease.

Knitting Row Counter

A simple and effective row counter for knitting and crochet. Save progress, set goals, and manage your projects.

Morse Code Generator

Free online Morse code generator. Convert text to Morse code and translate Morse code back to plain text. Includes audio playback and light signals.

Number to Words

Free online tool to convert any number into its written word equivalent. Supports large numbers and multiple languages. Perfect for checks, legal documents, and learning.

Online Notepad

Free online notepad. Write notes, lists, or code and have them automatically saved to your browser. No sign-up required, 100% private.

Password Strength Checker

Check how secure your password is. Our tool analyzes password entropy, length, and complexity to estimate crack time and security level.

Pet Food Calculator

Calculate daily calorie requirements and food portions for your dog or cat based on weight and activity level.

Privacy Policy Generator

Create a professional privacy policy for your website or mobile app in seconds. Compliant with GDPR, CCPA, and CalOPPA. 100% free online tool.

Random Team Generator

Free online tool to split a list of names into random teams or groups. Perfect for teachers, sports, games, and office activities.

Reading Progress & Time Calculator

Calculate how long it will take to read a book and track your reading progress. Set goals and find your daily page requirements.

Recipe Scaler

Adjust ingredient amounts for more or fewer servings. Easy-to-use tool for scaling recipes up or down without doing the math yourself.

Secure Password Generator

Free online password generator. Create secure, random, and strong passwords instantly. Protect your accounts with highly customizable security settings.

Tip Calculator & Bill Splitter

Free online tip calculator and bill splitter. Easily calculate tips and divide the total bill among friends. Perfect for dining out and group events.

Unit Converter

Free online unit converter. Quickly convert between units of length, weight, volume, temperature, area, and speed. Simple, fast, and accurate.

Vigenere Cipher

Free online Vigenere cipher tool. Encrypt and decrypt secret messages using a keyword. Perfect for learning cryptography and classic ciphers.

Wallpaper & Paint Calculator

Calculate how much wallpaper or paint you need for your room. Easy-to-use estimator considering wall dimensions, windows, and doors.

WiFi QR Code Generator

Generate a free QR code for your WiFi network. Let guests scan to connect instantly without typing passwords. Secure and private online tool.