YAML to JSON Converter

Anchors, aliases and merge keys

YAML lets a block be named with &anchor, reused with *alias and merged with <<:. JSON has no such thing, so every alias is expanded into a full copy in the output.

Several documents in one file

A stream separated by --- lines (common for Kubernetes manifests) is converted into a JSON array with one element per document. Syntax errors are reported with their line and column.

Is my data safe?

Yes. Everything runs in your browser — nothing you paste is sent to a server, so payloads with customer data or credentials stay on your machine. Large inputs of several megabytes are processed once you stop typing, without freezing the page.

More data tools

• JSON Formatter — Validate and pretty-print JSON, right in your browser.
• JSON Validator — Check whether JSON is valid and see the exact line and column of the error.
• JSON Diff — Compare two JSON documents by structure and list every added, removed or changed value.
• JSON to CSV Converter — Turn a JSON array into a CSV file, with nested keys flattened into columns.
• CSV to JSON Converter — Turn a CSV file with a header row into a JSON array, with numbers and booleans typed.
• JSON to YAML Converter — Convert JSON into clean, indented YAML for configs and manifests.
• XML to JSON Converter — Convert an XML document into JSON, attributes and repeated elements included.
• JSON to XML Converter — Convert JSON into a well-formed, indented XML document.
• JSON to TypeScript — Generate TypeScript interfaces from a sample JSON payload.
• XML Formatter — Pretty-print or minify XML and catch malformed tags, right in your browser.
• SQL Formatter — Format SQL queries with consistent indentation and upper-case keywords, per dialect.