Free Online Tools for Everyone

GoluBrain provides fast, ad-free, and mobile-friendly tools for students, professionals, and daily life. No sign-up. No clutter. Just results.

Explore Tools by Category

Grade Calculator

Calculate your grades and GPA easily. Perfect for students to track academic progress.

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Scientific Calculator

Simple and easy-to-use online scientific calculator for all your math needs.

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EMI Calculator

Calculate your bank, car, or home loan EMI with our easy-to-use EMI Calculator.

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Future Salary Calculator

Estimate your future salary with our online salary calculator tool.

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Online Bill Calculator

Calculate your total bill while shopping with our online bill calculator.

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Percentage Calculator

Calculate prices, amounts, or percentages easily with our percentage calculator.

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BMI Calculator

Check your BMI to stay fit. Uses your weight and height to determine your BMI status.

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Age Calculator

Calculate your age in years, months, days, hours, minutes, and seconds with precision.

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Character Counter

Count words, characters, sentences, and paragraphs with our online character counter tool.

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Character Remover

Remove or replace any character or word with this online character remover tool.

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Random Password Generator

Generate secure passwords with our Random Password Generator tool.

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SQL Formatter

Format your SQL queries with proper spacing using our online SQL formatter.

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System Design Whiteboard

Draw, teach, and interview online with our free system design whiteboard.

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Image Resizer

Resize your images online quickly and easily.

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PDF to Word

Convert your PDF files to editable Word documents instantly.

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Online Sticky Notes

Take and organize your notes in a unique secure environment.

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Mortgage Calculator

Estimate your home loan payments, interest, and amortization schedule with our advanced mortgage calculator.

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Currency Converter

Convert currencies instantly with live rates. Supports all countries and is perfect for travelers and business.

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