Free Online JSON Tools
Validate, format, minify, view, diff, and transform JSON data directly in your browser.
JSON to TypeScript
Convert JSON to TypeScript interfaces instantly. Free online JSON to TS type generator with nested object support.
JSON Formatter & Minifier
Format, beautify, and minify JSON online. Free JSON formatter with syntax validation and error highlighting.
JSON Validator
Validate JSON syntax with detailed error reporting including line and column numbers. Free online JSON validator with instant feedback and structure analysis.
JSON Minifier
Minify JSON by removing whitespace, line breaks, and indentation. Free online JSON minifier with size comparison and savings display.
JSON Viewer
View JSON as an interactive collapsible tree with color-coded types. Free online JSON viewer with expand/collapse nodes and type highlighting.
JSON Diff
Compare two JSON strings and highlight differences line by line. Free online JSON diff tool with added, removed, and changed line detection.
JSON Sorter
Sort JSON object keys alphabetically with recursive nesting support. Free online JSON key sorter for consistent, predictable JSON output.
JSON Escape/Unescape
Escape and unescape JSON strings. Handle newlines (\n), tabs (\t), quotes (\"), backslashes (\\) and Unicode. Free online JSON string escaper.
About JSON Tools
JSON (JavaScript Object Notation) is the most common data format for web APIs, configuration files, and data interchange. Our JSON tools help you validate syntax with precise error locations, format messy JSON for readability, minify for production, visualize structure as an interactive tree, compare two versions with diff highlighting, and sort keys alphabetically. All processing happens locally in your browser. Your JSON data is never sent to any server.