ABOUT / 01

About ToolDay

ToolDay is a collection of free online calculators and converters for everyday text, image, screen-size, and unit tasks. Each page completes one calculation or conversion directly in your browser without installation or an account.

Tools available today

Count characters and UTF-8 bytes, recover mistyped keyboard layouts, clean pasted text, compress images toward a target file size, calculate aspect ratios, convert px and rem, and check WCAG color contrast in Korean or English.

Our principles

• Process inputs locally in your browser whenever possible.
• Never clone pages just to target keyword variations.
• Explain examples, limitations, and privacy on the tool page.
• Keep tools free and independent of paid runtime APIs.