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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 standard Base64 or Base64URL into UTF-8 text in the browser with explicit normalization and invalid-input diagnostics.

Detect and convert CSS colors between RGB, RGBA, HEX, HEXA, HSL, and HSLA, including modern syntax.

Decode JWT header and payload JSON locally, then inspect algorithms, audiences, and registered time claims without signature validation.

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.

Count words, Unicode characters with or without whitespace, UTF-8 bytes, lines, paragraphs, and sentences without sending text to a server.