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Format JSON with readable indentation for debugging and documentation.

Generate TypeScript interfaces and types from valid JSON samples in the browser.

Validate JSON syntax in the browser and find errors before using payloads in APIs.

Encode UTF-8 text into Base64 directly in the browser for tests, headers, and payloads.

Decode Base64 strings into UTF-8 text in the browser and understand invalid input errors.

Convert CSS colors between RGB, RGBA, HEX, HEXA, HSL, and HSLA formats.

Generate up to 20 UUID v4 values for test fixtures and mock data, then copy them as lines, a JSON array, or a CSV column.

Compress PNG files locally with safe lossless and more aggressive size-reduction modes.