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Short, practical articles to help you get more done with our free tools.
Learn how to calculate percentage change between two values using a simple formula. See how to work out percentage increases and decreases, understand the difference between percentage change and percentage difference, and check your result with the free ToolCMB Percentage Calculator.
Compound interest lets your money earn interest on both the original amount and the interest already accumulated. Learn how compound interest works, see the formula with simple examples, and understand how interest rates, compounding frequency, regular deposits, and time affect your savings.
Mortgage interest is calculated from your outstanding loan balance and interest rate, so the amount of interest you pay usually decreases as you pay down the principal. Learn how mortgage interest is calculated, how amortization changes the split between interest and principal, and how to estimate your total interest with a mortgage calculator.
JSON and YAML are two popular formats for storing and exchanging structured data. Both can represent objects, arrays, strings, numbers, booleans, and null values, but they differ in syntax, readability, flexibility, and common use cases. This guide explains the practical differences between JSON and YAML and when you should choose each one.
Base64 encoding converts binary data into a text representation that can be safely stored or transmitted through systems designed to handle text. Learn what Base64 is, how encoding and decoding work, where it is used, its limitations, and how to encode or decode Base64 strings online.
Learn how to validate JSON, find syntax errors, understand line and column errors, and fix common problems such as trailing commas, single quotes, missing brackets, and unquoted keys.
Learn how to format JSON online, make minified JSON easier to read, find syntax errors, fix common problems, and convert JSON into other useful formats. This guide shows practical ways to clean up API responses, configuration files, logs, and JSON data without uploading your files.
JSON (JavaScript Object Notation) is a lightweight data format used to exchange information between websites, applications, APIs, and services. Learn how JSON objects, arrays, values, and key-value pairs work, see a practical example, and discover how to format, validate, minify, fix, and convert JSON directly in your browser.
Need to turn JPG images into a PDF? ToolCMB lets you convert one or multiple JPG files into a PDF directly in your browser. Arrange images, rotate pages, choose the page size and layout, then download your PDF without uploading your files to a server.
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