SupportWelcome 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.
File Splitter
Split large files (JSON, CSV, TXT, etc.) into smaller, manageable chunks by size, lines, or structured records. All processing happens securely in your browser, outputting a zip file.
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 ↔ CSV
The ultimate tool to convert JSON to CSV and CSV to JSON. Features built-in support for flattening nested objects, custom separators, and smart column detection. Process large datasets securely in your browser.
JSON ↔ EXCEL
Convert JSON to Excel (.xlsx) and Excel (.xlsx) to JSON in seconds. Supports nested JSON flattening, drag-and-drop uploads, and secure client-side conversion with no server upload.
JSON ↔ JSONL
Convert JSON to JSONL and JSONL to JSON instantly in your browser. Built for log pipelines and data engineering workflows with strict 5MB safety limits and private client-side processing.
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_20260516.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
Bar Chart
Create professional bar and column charts from your raw data instantly. Perfect for comparing categories and visualizing distributions with high-quality export options.
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.
Histogram
Analyze data distributions with our professional histogram tool. Automatically group numeric data into bins to visualize frequency and spread.
Line Chart
Visualize trends and time-series data with our professional line chart tool. Perfect for tracking progress, stock trends, or any sequential data points.
Pie Chart
Convert your CSV or JSON data into professional, presentation-ready pie charts instantly. Our secure, browser-based tool ensures your data never leaves your device while providing high-resolution export options.
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.
WiFi QR
Generate a scannable QR code for any WiFi network. Share with guests instantly.
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
Audio Editor
Edit and convert audio files directly in your browser. Trim, merge, adjust volume, and add fade effects with 100% privacy and no server uploads.
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.
Image Editor
High-quality image editing tool for resizing, compressing, cropping, and converting images (JPEG, PNG, WebP) with professional performance and privacy.
JS/TS Playground
A browser-based code playground for JavaScript and TypeScript. Write, execute, and debug code in real-time with zero setup and 100% privacy.
Payroll Calculator
A comprehensive payroll calculator to compute gross pay, deductions, taxes, and net salary. Generate and print professional payslips for your employees instantly.
Games
AI & Machine Learning
Stay ahead with the latest breakthroughs
Audio cues can make AI feel more human, though some users may judge it as rude
Researchers at Carnegie Mellon University are investigating how humans respond to artificial intelligence agents that sound physically present in the same room,...
Humans are bad at making complex decisions. AI can call them out
When a list of pros and cons won't cut it, a new decision-making tool developed by Cornell researchers can use artificial intelligence to help make difficult de...
Blind ambition: AI agents can turn tasks into digital disasters
Computer scientists at UC Riverside have identified troubling flaws in a new generation of artificial intelligence (AI) agents designed to take over routine com...
Designing better quantum circuits with AI
Researchers from the group of theoretical physicist Hans Briegel have collaborated with NVIDIA to develop an AI method that automatically generates efficient qu...
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Latest Articles
JSONL Explained: The Unsung Hero of Modern Software Development 📄
JSONL (JSON Lines) is the stream-friendly data format powering AI datasets, log systems, and big data pipelines. Learn what it is, why it exists, and how to use it in Python and Node.js.
Why Hash Algorithms Quietly Power Security, Data Integrity, and Modern Software Systems 🛡️
From fingerprints to foundations, explore how hash functions ensure data consistency, security, and trust in the digital age.
Mastering String Manipulation in JavaScript 🔠
A deep dive into Uppercase, Lowercase, Title Case, and Sentence Case transformations with real-world examples.
The Hidden Superpower of Productivity: Why Find and Replace Is One of the Most Important Tools You’re Not Fully Using
Find and Replace is a foundational productivity engine for developers, analysts, and content teams. Learn practical use cases, regex workflows, and safe best practices.
Why Markdown (.md) Became the Language of Documentation
Markdown became the default documentation format because it is readable, version-control friendly, and easy to scale across engineering, data, and product workflows.