Free Online Utility Tools

Explore a variety of free online tools for development, conversion, calculation, and more.

Developer Tools

Format, validate, and visualize JSON data with a tree view.

Encode text to Base64 or decode Base64 to text.

Encode or decode URL strings.

Parse JWT tokens to inspect header and payload.

Convert between PNG, JPG, WebP, and other image formats.

Convert images to PDF or extract images from PDF files.

Calculate the number of days between two dates.

Calculate your exact age in years, months, and days.

Perform various percentage calculations.

Calculate loan repayments with different amortization methods.

Calculate your take-home pay after taxes and deductions.

Count characters, words, and bytes in your text.

Convert text to uppercase, lowercase, camelCase, snake_case, and more.

Preview Markdown as rendered HTML in real time.