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Common developer tools like JSON formatting and UUID generation, right in your browser.
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What's New
- 2026-09-19Added Image Cropper
Added a tool to crop an image freely by dragging on it.
- 2026-09-19Added HTTP Headers Reference
Added a tool to look up commonly used HTTP request and response headers.
- 2026-09-19Added Loan Calculator
Added a tool to calculate the monthly payment, total payment, and total interest from a loan amount, annual rate, and term.
- 2026-09-19Added BMI Calculator
Added a tool to calculate BMI, weight category, and ideal weight from height and weight.
- 2026-09-18Added Age Calculator
Added a tool to calculate exact age and days until the next birthday.