POLPROG JSON Formatter

What POLPROG JSON Formatter is

POLPROG JSON Formatter is a free browser workspace for formatting, validating, inspecting and comparing JSON. Documents can be indented with two spaces, four spaces or tabs, minified, or sorted by keys in ascending or descending order. Conversion produces YAML, a TypeScript interface or CSV. Validation reports the error line, column, character offset and cause, and can flag duplicate keys or large integers that lose JavaScript precision. Semantic comparison ignores indentation, line endings and object-key order while preserving array order. A tree view offers copyable paths and values, and search locates keys or values. Processing runs locally in the browser; the page says pasted or dropped documents are never uploaded to POLPROG servers. Only the indentation choice is retained between visits, while document content is not stored or placed in the address bar. Files are limited to 5 MiB. Syntax highlighting turns off above 300 KiB, and detailed diff may stop early for very large trees. JavaScript is required.