About JsonCraft
JsonCraft is a focused JSON studio: a formatter, validator, tree explorer, diff and JSONPath query tool in one place. Instead of hopping between half a dozen sites, you paste your data once and switch tabs.
Every operation runs entirely in your browser. There are no accounts, no ads and no analytics that sell your behaviour. The JSON you paste — including tokens, keys and personal data — never leaves your device.
It is built and maintained by Interhive OÜ, a small studio in Tallinn that makes tiny, dependable web tools.
What it does
- Format & minify
Pretty-print JSON with indentation and highlighting, or compress it back to a single line.
- Validate
Find syntax errors with the exact message and position, right as you type.
- Tree view
Explore deeply nested data with a collapsible, colour-coded tree.
- Diff
Compare two documents and see every added, removed and changed value.
- JSONPath
Query data with keys, indexes, wildcards and recursive search.