Free Online Developer Tools
Format, validate, convert and query JSON, YAML and XML. Browser-based — your pasted content never leaves your machine. No signup required.
JSON Tools
Format, validate, minify and query JSON data.
JSON Formatter
FlagshipFormat, beautify, validate and minify JSON. Tree view, sort keys, find duplicates, load from URL.
Open tool →JSON Validator
Check JSON syntax and pinpoint the exact line and column of any error.
Open tool →JSON Minifier
Strip whitespace and compress JSON to the smallest valid representation.
Open tool →JSON to YAML
Convert JSON to clean, readable YAML instantly.
Open tool →jq Playground
Run jq 1.6 filter expressions against JSON data in your browser.
Open tool →JSONPath Playground
Query JSON with JSONPath expressions like $.store.books[*].title.
YAML Tools
Format, validate and convert YAML configuration files.
YAML Formatter
FlagshipFormat and validate YAML. Detects YAML 1.1 coercion risks, expands anchors, converts to JSON.
Open tool →YAML Validator
Check YAML syntax and catch indentation errors with line-level reporting.
Open tool →YAML to JSON
Convert YAML to formatted JSON instantly in your browser.
Open tool →XML Tools
Format, validate and convert XML documents.
XML Formatter
FlagshipFormat and validate XML. Minify, check well-formedness and convert to JSON.
Open tool →XML Validator
Check whether XML is well-formed with exact line and column error reporting.
Open tool →XML to JSON
Convert XML to formatted JSON instantly in your browser.
Open tool →