unbreak.tools

Paste broken JSON, YAML or AI output — we'll tell you what's wrong and fix it

Free, private developer tools for JSON, YAML, and XML. Everything runs locally — your data never leaves your device.

All tools run 100% in your browser. No uploads, no tracking, no sign-up.

JSON

JSON Formatter
Format and beautify JSON with customizable indentation. Runs entirely in your browser — no data uploaded. Free, fast, and private.
JSON Validator
Validate JSON and find exact error locations with plain-English explanations. Runs in your browser — no data uploaded. Free and private.
JSON Viewer
Explore JSON in an interactive tree view with search, JSONPath inspection, and virtualized scrolling. Runs in your browser. Free.
JSON Minifier
Minify and compress JSON. See byte savings before and after, plus a gzip size estimate. Runs in your browser. Free and private.
JSON Unescape
Unescape doubly or triply escaped JSON strings. Auto-detects escape depth and shows how many levels were unescaped. Runs in your browser. Free.
JSON Escape
Escape JSON or text into a string literal for JavaScript, Python, Java, or C#. Options for Unicode escaping and quote wrapping. Runs in your browser.
JSON Flatten
Flatten nested JSON into dot-notation paths and unflatten it back. Custom delimiters, bracket or dot array index style. Runs in your browser. Free.
JSONC to JSON
Convert JSONC (JSON with comments) to standard JSON. Strips // and /* */ comments and trailing commas safely. Runs in your browser. Free and private.
JSON Diff
Compare two JSON files semantically. See a tree of changes, JSON Patch, and a markdown report. Ignore key order and timestamps. Free and private.
JSON Compare
Compare two JSON documents side-by-side with aligned lines and change highlighting. Jump between changes, filter by type, and export. Free and private.

Converters

JSON to CSV Converter
Convert JSON arrays to CSV online. Flatten nested objects, handle arrays, preview a table, and download with UTF-8 BOM for Excel. Free and private.
CSV to JSON Converter
Convert CSV to JSON online with type inference and header detection. Handles quoted fields, multi-line values, and custom delimiters. Free and private.
JSON to YAML Converter
Convert JSON to YAML online with preserved key order and multi-document support. Handles nested objects, arrays, and special characters. Free and private.
YAML to JSON Converter
Convert YAML to JSON online with multi-document support. Handles tabs, anchors, aliases, and Unicode. Free and private — all processing in your browser.
JSON to XML Converter
Convert JSON to XML online with attribute prefixing, array handling, and custom root elements. Handles nested objects and special chars. Free and private.
XML to JSON Converter
Convert XML to JSON online with attribute prefixing, array detection, and namespace stripping. Handles CDATA and special chars. Free and private.
JSON to TypeScript & Types Generator
Generate TypeScript, Zod, Go, Pydantic, or C# types from JSON. Infer optional fields from multiple samples. Free, private, browser-based.
JSON to Dart Class Generator
Generate Dart model classes from JSON with null safety, fromJson factory, and toJson methods. Handles nested objects and arrays. Free and private.
JSON Schema Generator (Draft 2020-12)
Generate JSON Schema (draft 2020-12) from JSON data. Infers types, required fields, and array item schemas. Toggle additionalProperties. Free and private.