JSON, regex, encoders, formatters and more for developers. Every tool runs entirely in your browser — nothing is uploaded. 5 free tools available.
Format, validate, and explore JSON in your browser — pretty-print (2/4/tab) or minify, real-time validation with human-friendly error explanations and line/column, an interactive searchable tree view, live statistics, and duplicate-key and unsafe-integer detection. Nothing is ever uploaded.
Convert between JSON and YAML in your browser, both directions, with real-time validation and human-friendly errors (line & column), a searchable tree view, statistics, and warnings for duplicate keys, unsafe integers, multi-document streams, anchors, aliases, and merge keys. Lossless round-trips; nothing is ever uploaded.
Compare two JSON documents in your browser and see exactly what changed — a structural diff with added, removed, changed, and type-changed nodes, colour-coded unified and side-by-side views, search and jump-to-difference, statistics, and an exportable RFC 6902 JSON Patch. Both documents are validated independently; nothing is ever uploaded.
Format, minify, and validate XML in your browser — pretty-print with 2/4/tab indentation, real-time well-formedness validation with line & column, an interactive searchable tree view, statistics, and a namespace/DOCTYPE/entity summary. External entities and DTDs are never resolved (XXE-safe); nothing is ever uploaded.
Convert between CSV and JSON in your browser, both directions — auto delimiter detection, header + quote handling, optional type inference, nested-object flattening (dot notation), a table preview, a JSON tree view, statistics, and friendly errors with row & column. Spreadsheet formulas are treated as plain text (CSV-injection safe); nothing is ever uploaded.