Welcome to BrainyTools

A collection of free, simple, and essential tools for developers and creators. Boost your productivity with our suite of online utilities.

Text & Data

Base64

Our professional-grade Base64 utility provides a seamless way to convert text into Base64 format or decode existing Base64 strings back into human-readable text. Designed for developers and IT professionals, this tool operates entirely within your browser to ensure maximum privacy and security for your data.

Case Converter

Our professional Text Case Converter is the fastest way to transform your writing into the exact format you need. Whether you are fixing accidental "CAPS LOCK" typing, preparing headlines for a blog, or formatting code strings, our tool provides a suite of transformation options to save you time and effort.

Date Converter

A professional, real-time date and time conversion utility. Instantly convert between Unix timestamps, ISO 8601, and human-readable formats across any global timezone. 100% client-side for maximum privacy.

Find & Replace

Our high-performance Find & Replace utility is designed for writers, developers, and editors who need a fast, reliable way to perform mass text substitutions. Whether you are updating a specific term across a large document or using Regular Expressions (Regex) for complex pattern matching, our tool provides a secure, browser-based solution for all your text manipulation needs.

JSON Formatter

The ultimate developer tool to prettify, validate, minify, and transform your JSON data. Extract specific fields with lodash paths, remove sensitive keys, and merge multiple JSON files securely in your browser.

Markdown Preview

Our real-time Markdown Previewer is the perfect tool for developers and writers to visualize their Markdown scripts instantly. Whether you are crafting a README.md for GitHub, writing a blog post, or formatting documentation, our tool provides a live, side-by-side or top-down preview of exactly how your content will look once rendered.

Word Counter

Welcome to the ultimate Real-Time Word and Character Counting Tool. Whether you are a professional writer, a student working on an academic essay, or an SEO specialist crafting meta descriptions, our tool provides the precision you need. Instantly track your progress as you type and ensure your content meets every specific requirement.

Generators

Hash Generator

Our professional Hash Generator provides a robust way to calculate cryptographic hashes for any text or data. Supporting industry-standard algorithms like MD5 and SHA-256, this tool is essential for developers, security experts, and IT professionals who need to verify data integrity, generate unique identifiers, or troubleshoot authentication systems.

Lorem Ipsum Generator

Create professional placeholder text instantly with our customizable Lorem Ipsum Generator. Perfect for designers, developers, and content creators who need high-quality filler text for website mockups, print layouts, or presentations. Choose your desired length and format to fit any project requirement.

Mock Data Generator

Accelerate your development process with high-quality, realistic test data. Our Mock Data Generator allows you to create custom datasets in JSON, CSV, and SQL formats across multiple categories, ensuring your applications are battle-tested with varied and representative information.

Password Generator

Protect your digital identity with our high-security Password Generator. Instantly create complex, random passwords that are virtually impossible to hack. Our browser-based tool ensures your new credentials never touch a server, providing the ultimate in privacy and peace of mind.

Random Generator

Generate truly random numbers and secure alphanumeric strings instantly with our high-performance utility. Whether you are running a giveaway, creating unique identifiers for a database, or needing test data for your software, our tool provides a fast and reliable source of randomness.

UUID Generator

Generate secure, unique identifiers instantly. Our UUID Generator supports both standard Random UUID v4 and the modern, time-ordered UUID v7. Perfect for developers needing primary keys, session IDs, or bulk test data with flexible formatting options.

Visual Codes

Barcode Generator

Generate professional, high-resolution 1D barcodes for retail, logistics, and inventory management. Our free online tool supports all major industry standards including EAN-13, UPC, and Code 128, allowing you to create custom labels with precision and ease.

QR Code Generator

Generate custom, professional-grade QR codes instantly. Whether you need a code for your website, business cards, or WiFi access, our tool provides full control over colors, size, and error correction for perfect results every time.

Calculators & Business

Age Calculator

Calculate your exact age in years, months, and days instantly. Discover your Western and Chinese zodiac signs, along with your Chinese zodiac personality traits. Perfect for milestone planning or satisfying your curiosity with precise insights.

Base Converter

Easily convert numbers between Binary, Decimal, Hexadecimal, and Octal bases. Our high-precision Base Converter is a vital tool for programmers, computer scientists, and students working with low-level data representation and hardware logic.

BMI Calculator

Calculate your Body Mass Index (BMI) with our interactive visual tool. Use sliders to adjust height and weight, select your somatotype (Ectomorph, Mesomorph, Endomorph), and see a real-time visualization of your body profile.

Color Converter

Our professional-grade Color Converter provides instant transformations between Hex, RGB, and HSL color spaces. Designed for web designers and front-end developers, this tool ensures you always have the right color codes at your fingertips with absolute visual precision.

Data Size Converter

Convert between different units of data storage including Bytes, Kilobytes (KB), Megabytes (MB), Gigabytes (GB), and Terabytes (TB). Our converter uses the standard binary calculation (1024) for maximum technical accuracy.

Gradient Tool

Create beautiful, modern CSS gradients instantly with our professional-grade generator. Perfect for web designers and developers needing custom background styles with full control over colors, angles, and transparency.

Percentage Calculator

Master your finances and data analysis with our versatile Percentage Calculator. Quickly calculate percentage increases, decreases, and specific values for discounts, tips, or statistical reporting with absolute ease.

Subnet Calculator

Our professional IPv4 Subnet Calculator is an essential tool for network administrators and IT students. Quickly determine network addresses, broadcast addresses, and usable host ranges to ensure efficient IP management and network design.

Unit Converter

Our comprehensive Unit Converter provides instant transformations across length, weight, temperature, and more. Designed for engineers, students, and travelers, this tool ensures you always have the right measurements at your fingertips with scientific precision.

Science & Math

Ohm's Law

Calculate Voltage, Current, or Resistance using Ohm's Law. Includes interactive visualizations to help students understand the relationship between electrical components.

Standard Deviation

Calculate population and sample standard deviation, variance, and range. Includes automatic outlier detection and data visualization using histograms and bar charts.

Statistics Calculator

Calculate the mean, median, and mode of a set of numbers. Simply input your data separated by commas, spaces, or new lines.

SaaS Tools

ID Card

Generate professional ready-to-print ID cards for schools, companies, events, and memberships. Supports CR80 and CR100 sizes with front and back designs.

Tax Calculator

Get a quick estimate of your net income after tax with our simplified Income Tax Calculator. Perfect for basic financial planning and understanding your take-home pay across different common tax brackets.