All Tools

Browse our complete collection of free online tools. All tools process data in your browser for maximum privacy and speed.

Student Tools

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GPA Calculator

Calculate your college or high school Grade Point Average on a 4.0 weighted scale.

CGPA Calculator

Calculate Cumulative Grade Point Average across all college or university semesters.

Percentage Calculator

Calculate percentages, exam marks percentage, discounts, and proportion ratios.

Attendance Calculator

Calculate college attendance percentage and find out how many classes you can skip.

Grade Calculator

Calculate final grades, weighted assignment scores, and exam targets.

BMI Calculator (Body Mass Index)

Calculate Body Mass Index (BMI) using Metric (cm/kg) or Imperial (ft/in/lbs) units.

Scientific Calculator Online

Perform advanced mathematical, trigonometric, logarithmic, and power calculations.

Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals to numbers (1 to 3999).

Fraction Calculator

Add, subtract, multiply, and divide fractions with simplification and mixed numbers.

Developer Tools

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JSON Formatter

Format, validate, beautify, and inspect JSON code online with syntax highlighting.

JSON Validator

Validate JSON syntax and identify formatting errors with line and column pointers.

JSON Minifier

Minify and compress JSON data by stripping whitespace and line breaks.

Base64 Encoder

Encode text and strings to Base64 format online using UTF-8 encoding.

Base64 Decoder

Decode Base64 strings back to readable plain text and UTF-8 strings.

URL Encoder

Encode special characters in URLs using standard percent-encoding (RFC 3986).

URL Decoder

Decode percent-encoded URLs and query strings back to human-readable text.

UUID Generator

Generate cryptographically random RFC 4122 Version 4 UUIDs / GUIDs online.

JWT Decoder

Decode and inspect JSON Web Tokens (JWT) headers, payloads, and claims online.

Regex Tester

Test, debug, and validate regular expressions online with real-time match highlighting.

Number Base Converter

Convert numbers seamlessly between Binary, Decimal, Hexadecimal, and Octal bases.

Color Code Converter

Convert color codes between HEX, RGB, HSL, and CMYK formats with visual color picker.

HTML Entity Encoder & Decoder

Encode and decode HTML special characters and entities to prevent XSS and rendering bugs.

Markdown to HTML Converter

Convert Markdown syntax into clean HTML code with live formatted visual preview.

Cron Expression Generator

Generate, test, and understand crontab schedules with human-readable descriptions.

Unix Timestamp Converter

Convert Unix epoch timestamps to human-readable dates (UTC, ISO 8601, Local).

Web & SEO Tools

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Meta Tag Generator

Generate optimized HTML meta tags, Open Graph data, and Twitter cards with live SERP preview.

Open Graph Generator

Generate high-CTR Open Graph (og:) and Twitter Card meta tags for Facebook, LinkedIn, and Twitter/X.

Robots.txt Generator

Create customized robots.txt files with allow, disallow, crawl-delay, and XML sitemap directives.

XML Sitemap Generator

Generate standard XML sitemaps for Google Search Console and Bing Webmaster Tools.

UTM Campaign URL Builder

Create custom Google Analytics 4 (GA4) campaign tracking links with UTM parameters.

Schema Markup Generator

Generate JSON-LD structured data for FAQPage, Article, Organization, and Product schemas.

Finance Tools

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Loan Calculator

Calculate monthly payments, total interest, and annual amortization schedule.

EMI Calculator

Calculate Equated Monthly Installment (EMI) for home loans, car loans, and personal loans.

Compound Interest Calculator

Calculate compound interest growth with monthly additions and yearly breakdown schedule.

Simple Interest Calculator

Calculate simple interest (I = P × r × t) and total payoff amounts quickly.

Tip & Bill Split Calculator

Calculate restaurant tips, bill totals, and split payments evenly among guests.

Discount & Sale Price Calculator

Calculate sale prices, percentage discounts, extra coupon codes, and sales tax.

Salary & Hourly Wage Calculator

Convert between hourly wage, weekly, bi-weekly, monthly, and annual salaries.

Currency Converter

Convert between major world currencies (USD, EUR, GBP, CAD, AUD, JPY, INR, PKR).

Image Tools

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Image Compressor

Compress JPG, PNG, and WebP images online in your browser without uploading.

Image Resizer

Resize images by pixel dimensions or percentage with aspect ratio lock.

Image Color Picker & Eyedropper

Upload any image and click pixels to extract exact HEX and RGB color codes.

Image to Base64 Converter

Convert images into Base64 Data URI strings, HTML <img> tags, and CSS code.

Online Image Cropper

Crop images online to 1:1 square, 16:9 widescreen, or 4:3 with instant PNG download.

Aspect Ratio Calculator

Calculate image and video aspect ratios (16:9, 4:3, 1:1) and proportional dimensions.

Security & Utility Tools

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Password Generator

Generate strong, random, and secure passwords with customizable character rules.

QR Code Generator

Generate custom QR codes for URLs, text, email, phone, and Wi-Fi networks online.

Password Strength Checker & Entropy

Test password security strength, calculate entropy bits, and estimate crack times.

Hash Generator (SHA-256, SHA-512, SHA-1)

Generate cryptographic hash digests (SHA-256, SHA-512, SHA-384, SHA-1) in real-time.

Random Number Generator (RNG)

Generate cryptographically secure random numbers with custom ranges and lottery presets.

IP Address Analyzer & Validator

Analyze IPv4 and IPv6 addresses, inspect private/public scopes, and view binary notations.

Text Tools

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Word Counter

Count words, characters, sentences, paragraphs, and estimate reading time online.

Character Counter

Count total characters, characters without spaces, words, and byte sizes.

Case Converter

Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.

Text Diff Checker

Compare two text blocks side-by-side to highlight additions, deletions, and changes.

Lorem Ipsum Generator

Generate placeholder dummy text by paragraphs, sentences, or word counts.

Text Reverser

Reverse text characters, words, or lines instantly with one-click copy.

Duplicate Line Remover

Remove duplicate lines from text lists, logs, and CSV files with removal stats.

Line Sorter (Alphabetical & Numerical)

Sort text lines alphabetically (A-Z, Z-A), by length, numerically, or shuffle randomly.

Text to URL Slug Converter

Convert article titles and strings into clean, SEO-friendly URL slugs.

Time & Date Tools

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Age Calculator

Calculate exact age in years, months, days, hours, minutes, and next birthday countdown.

Online Countdown Timer

Set custom live countdown timers for events, exams, launches, and deadlines.

Date Difference Calculator

Calculate days, weeks, months, years, and business working days between two dates.

World Time Zone Converter

Compare and convert local times across global timezones (UTC, EST, PST, GMT, IST, JST).

Online Stopwatch with Lap Times

Accurate online stopwatch with millisecond precision, start, pause, and lap recording.

Business Tools

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Free Invoice Generator

Create, customize, and print professional invoices with tax calculations and PDF export.

Profit Margin Calculator

Calculate gross profit margin percentage, net profit, and markup from cost and revenue.

Markup Calculator

Calculate target selling price and profit from cost price and desired markup percentage.

Break-Even Point Calculator

Calculate break-even units and revenue needed to cover fixed and variable business costs.

VAT & Sales Tax Calculator

Add or remove Value Added Tax (VAT) and calculate net, gross, and tax amounts.

Social Media Tools

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Twitter (X) Character Counter

Count Twitter / X post characters with 280-limit progress bar and link weights.

Instagram Bio Generator & Formatter

Format aesthetic Instagram bios with 150-character counter and live profile preview.

Hashtag Generator for Social Media

Generate trending hashtags for Instagram, TikTok, Twitter, and LinkedIn.

YouTube Thumbnail Checker & Previewer

Check thumbnail resolution (1280x720), aspect ratio, and preview in YouTube UI.

Unit Converters

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Length & Distance Converter

Convert between Meters, Kilometers, Feet, Inches, Miles, Yards, and Nautical Miles.

Weight & Mass Converter

Convert between Kilograms, Grams, Pounds (lbs), Ounces (oz), Stones, and Metric Tons.

Temperature Converter (Celsius, Fahrenheit, Kelvin)

Convert temperatures between Celsius (°C), Fahrenheit (°F), and Kelvin (K).

Data Storage Converter (Bytes to TB/GB)

Convert digital storage units between Bytes, KB, MB, GB, TB, and PB in binary and decimal.

Speed & Velocity Converter

Convert speed between km/h, mph, m/s, knots, ft/s, and Mach (speed of sound).

PDF Tools

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PDF Merger — Combine PDF Files

Merge and combine multiple PDF documents into a single PDF in your browser.

PDF Page Counter

Count total and individual page counts across single or bulk PDF documents.