JSON & Data Tools

JSON is the interchange format of the web. Every REST API returns it, every package manifest reads it, and nearly every frontend consumes it. Because it is everywhere, the small frustrations multiply: one missing comma invalidates a whole file, a minified blob is impossible to review, and two files that should be identical quietly drift apart. This category collects tools that fix those specific problems instead of asking you to load a general-purpose editor.

The formatter and minifier cover the two ends of readability. Formatting re-indents a packed document and gives every key and value room to breathe, which is what you want before a code review. Minifying does the opposite: it strips whitespace for the smallest possible payload, which is what you want when a document is about to ship inside a request body or a config template.

The validator answers the most common question in JSON work: where exactly is this file broken? It parses the document and reports the line and column of the first error, so a missing comma, a stray quote or a trailing comma is found in seconds instead of by eyeballing hundreds of lines.

Data comparison and cleanup are covered by the diff and sort tools. Diff shows which keys and values changed between two documents, value by value, which is how you catch an accidental change in a config or a migration. Sort arranges keys in a stable, repeatable order, useful for checking JSON files into version control so they stop generating churn.

Interchange is handled by the converters. CSV to JSON and back is the daily work of moving data between spreadsheets and systems. JSON to YAML and YAML to JSON cover config files that need to switch representations. JSON to TypeScript generates a typed interface from a sample, which saves time when a new API shape arrives.

Every tool here runs in the browser. Documents are processed locally and never uploaded, which matters when the data comes from production systems or contains information you do not want leaving the machine. Choose the tool by the exact symptom: unreadable output, a syntax error, a diff you need to inspect, or a format you need to change.