All developer tools

Validate JSON syntax against RFC 8259 in real time. Precise line and column error reporting, 100% client-side.

Interactive collapsible tree viewer for large JSON documents with search, copy-path, and syntax highlighting.

Strip whitespace and shrink JSON payloads to the smallest possible size for APIs, storage, and network transfer.

Explore nested JSON as an interactive tree — expand, collapse, filter and copy JSON paths of any node.

Side-by-side comparison of two JSON documents with structural highlighting to spot differences instantly.

Structural diff of two JSON objects or arrays showing added, removed and modified keys with paths.

Convert JSON arrays to CSV rows with automatic header detection and configurable delimiters.

Convert CSV tables to structured JSON with header inference, type coercion and streaming for large files.

Convert JSON documents into well-formed XML with configurable root element and attribute handling.

Convert XML documents into clean JSON, preserving element structure, attributes and namespaces.

Convert YAML configuration files into JSON while preserving comments, anchors and multi-document streams.

Encode or decode Base64 payloads with UTF-8 support. Handy for JWTs, data URIs and binary transport in JSON.

Decode JSON Web Tokens to inspect the header, payload and signature — verify claims and expiry in-browser.