Free Online Tools - ArrayKey

# QR Code Generator

Generate high-quality, customizable QR codes using our QR Code Generator. Whether it’s a website URL, email, vCard, phone number, or WiFi access — this tool creates clean and scannable QR codes instantly. You can use them for marketing materials, product packaging, restaurant menus, or event access. QR codes are downloadable in high resolution, ensuring they're print-ready. You don’t need technical skills or logins — just enter your content and download. Perfect for businesses, freelancers, educators, and individuals who need fast QR creation on the go.

# Barcode Generator

Generate professional barcodes instantly using our Barcode Generator. Supports popular formats like Code128, Datamatrix, and QR code. Perfect for product labeling, inventory management, shipping, event tickets, and packaging. Create single or multiple barcodes at once, customize units, bar width, and height, and download high-resolution PNGs or PDFs ready for printing. Easy to use, fast, and completely free.

# URL Link Shortener

Simplify long URLs into clean, trackable links using our URL Link Shortener. Our tool doesn’t add spam, and there’s no waiting time. It’s ideal for affiliate marketers, social media influencers, teachers, and event managers. Use short URLs to improve branding, make QR codes prettier, or just to declutter content. All links are secure and redirect instantly. 100% free and ad-free, with no account required.

# Fake Data Generator

Need dummy data for development, testing, or teaching? The Fake Data Generator creates realistic-looking names, emails, addresses, dates, phone numbers, and more — instantly. It’s perfect for frontend mockups, database seeding, QA automation, and student projects. You can generate localized data for countries like India or the US, and copy or export them directly. All data is randomly generated and doesn’t represent real users. No login needed — it’s fast, free, and accurate.

# Hash Generator (MD5, SHA, etc.)

Highly Secure your strings and data with cryptographic hash values i.e. MD5, SHA-1, and SHA-256. Our Hash Generator is a must-have tool for developers dealing with passwords, API keys, data signatures, and blockchain apps. Just enter your input and choose the algorithm — the tool outputs the exact hashed value instantly. All hashing is processed locally in your browser for maximum security. No installation or coding knowledge required.

# Age Calculator

Find out exactly how old you are — in years, months, days, hours, and even seconds — with our accurate Age Calculator. Once enter your date of birth to get a full breakdown of your age. It works for anniversaries, DOB verification, retirement planning, and more. The calculator auto-adjusts for leap years and varying month lengths. Ideal for schools, HR, government forms, and personal curiosity. It’s simple, fast, and works on all modern devices.

# Unit Calculator

Convert between common measurement units using our all-in-one Unit Calculator. Whether you need to change kilometers to miles, Fahrenheit to Celsius, or grams to pounds — this tool does it instantly. Great for science, engineering, academics, or everyday tasks like cooking and traveling. It supports length, weight, area, volume, temperature, and more. Just select a category, enter your value, and see the result in real time. Free to use, ad-free, and fast.

# EMI Calculator

Plan your loans smarter with our EMI Calculator. Calculate monthly loan installments for home loans, personal loans, car loans and education loans instantly. Enter principal amount, interest rate and tenure to estimate monthly EMI, total interest payable and total repayment amount. This tool helps compare borrowing scenarios before taking a loan and is useful for individuals, financial planners and students learning loan calculations. Fast, accurate and free to use without registration.

# GST Calculator

Calculate taxes quickly using our GST Calculator . Whether you want to add GST or remove GST from a price, this tool gives instant results. Useful for businesses, freelancers, shop owners, students and accountants, the calculator supports common GST slabs and helps simplify invoice calculations. Instead of manual tax computation, you can estimate net price, tax amount and gross amount in seconds. Simple, mobile friendly and completely free.

# SIP Calculator

Estimate future mutual fund growth using our SIP Calculator . Plan monthly investments, project returns and understand the power of compounding through systematic investment planning. Enter your monthly investment, expected return rate and investment period to view estimated maturity value, invested amount and wealth growth. Useful for beginners, long-term investors and anyone planning financial goals like retirement, education or wealth creation. Fast calculations, interactive and beginner friendly.

# Password Generator

Create strong secure passwords instantly using our Password Generator . Generate random passwords with uppercase, lowercase, numbers and symbols to improve account security. Whether you need passwords for email, banking, social media or development systems, this tool helps create hard-to-guess credentials quickly. You can customize length and complexity based on your needs. Everything runs in-browser for privacy and no passwords are stored. Simple, secure and free forever.

# JSON Formatter Validator Viewer

Work with structured data faster using our JSON Formatter . Format, validate, minify and inspect JSON data online through an interactive tree viewer. Developers can beautify raw API responses, check syntax errors, audit duplicate values and explore nested objects more efficiently. This tool is useful for API testing, configuration debugging, development workflows and learning JSON. Private browser processing means your data stays local and nothing is uploaded. Fast, lightweight and built for developers.