https://localonly.dev/ A fast, privacy-first developer toolkit. Format, validate, convert and inspect JSON - plus dozens of developer utilities. Everything runs 100% in your browser. No uploads, no tracking, no backend. en Tue, 21 Jul 2026 00:00:00 GMT https://localonly.dev/plantuml/ https://localonly.dev/plantuml/ Free online PlantUML editor with live preview, syntax highlighting, templates and PNG/SVG export. Diagrams render entirely in your browser - your code stays private. Tue, 21 Jul 2026 00:00:00 GMT https://localonly.dev/json-schema-validator/ https://localonly.dev/json-schema-validator/ Free online JSON Schema validator powered by AJV. Validate a JSON document against a schema and get precise, path-level error messages, all in your browser. Wed, 17 Sep 2025 00:00:00 GMT https://localonly.dev/json-schema-generator/ https://localonly.dev/json-schema-generator/ Free online JSON Schema generator that infers a draft JSON Schema from a sample JSON document. Generate types, required fields, and structure in your browser. Wed, 03 Sep 2025 00:00:00 GMT https://localonly.dev/json-path/ https://localonly.dev/json-path/ Free online JSONPath evaluator to query JSON with expressions like $.store.book[*].author. Test filters and wildcards live and privately in your browser. Wed, 20 Aug 2025 00:00:00 GMT https://localonly.dev/json-statistics/ https://localonly.dev/json-statistics/ Free online JSON statistics tool that analyzes size, nesting depth, key and value counts, and type distribution. Understand any JSON document in your browser. Wed, 06 Aug 2025 00:00:00 GMT https://localonly.dev/json-tree-viewer/ https://localonly.dev/json-tree-viewer/ Free online JSON tree viewer to explore nested JSON as a collapsible interactive tree. Expand, collapse, and navigate large documents visually in your browser. 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