JSON is the lingua franca of modern APIs, and "format this JSON" is the single most repeated debug task in any engineering team. The JSON Tools hub on Ai2Done focuses every JSON utility into a single page — formatter, validator, minifier, tree viewer, JSONPath search — and runs them all entirely in your browser so production credentials and PII never leak to a third-party site.
The flagship is the JSON Formatter: paste a payload, choose between two-space, four-space or tab indentation, and instantly see a pretty-printed view with syntax errors highlighted at the failing line. The tree view collapses deeply nested structures into a navigable hierarchy, which is often the fastest way to find the field you actually care about in a multi-thousand-line API response. Minification produces a single-line compact form for embedding in code or transmitting over bandwidth-constrained channels.
JSONPath search is the underused power feature: type an expression like $..items[?(@.price>100)].name and the tool extracts matching values from the document. For ad-hoc data shaping (pull a list of IDs out of a webhook payload, count how many objects match a condition) this beats jq for non-CLI users.
The engine is a TinyGo-compiled Wasm binary that loads in under a second on a typical broadband connection and is cached for subsequent sessions. Parse and reflow happen on the main thread for files up to a few megabytes; we move to a worker thread for larger payloads to keep the UI responsive. Privacy is structural — there is no server, no logging and no telemetry on pasted content.
Pair this hub with the Format Tools hub (which collects formatters for XML, SQL and YAML alongside JSON) and the Dev Tools hub for adjacent engineering utilities. For production use, copy the output back into your editor and let your project's formatter / linter enforce house style; this hub is the "instant readable" layer for debugging in the moment.