Broken JSON?
Fixed in a click.
JRJI is a fast, modern toolkit for fixing, minifying, diffing and converting JSON — all running 100% in your browser. Nothing is uploaded, ever.
// before: trailing comma + unquoted key
{
name: "jrji",
tools: ["fixer", "diff",],
}
// after: valid JSON
{
"name": "jrji",
"tools": ["fixer", "diff"]
}Everything JSON, in one place
Six focused tools that cover the entire JSON workflow — each one instant and private.
JSON Fixer
Repair broken, malformed JSON with one click. Trailing commas, unquoted keys, single quotes — fixed.
JSON Minifier
Strip whitespace and comments to shrink payloads for APIs and storage.
JSON Diff
Compare two JSON documents and see exactly what changed.
JSON to CSV
Flatten JSON arrays into clean CSV for spreadsheets.
JSON Viewer
Pretty-print and explore JSON in a collapsible tree.
Blog & Guides
Practical JSON tips, API patterns, and tool deep-dives.
Private by design
No servers, no tracking, no uploads. Your data stays on your machine.
Instant & lightweight
Pure client-side logic means results in milliseconds, even on huge files.
Developer-first
Clean output, keyboard-friendly, and built for the way you actually work.
Frequently asked
Is my data uploaded anywhere?
No. Every tool runs entirely in your browser using JavaScript. Your JSON never leaves the device — we never see it.
Do I need an account?
No account, no sign-up. Open a tool and paste your JSON.
Which JSON problems can the Fixer handle?
Trailing commas, unquoted object keys, single quotes, JavaScript-style comments, and some brace/paren mismatches. It is a best-effort repair, not a full parser.
Is it free?
Yes. JRJI is a free, privacy-first toolkit.
Start fixing JSON in seconds
No install, no account. Paste your JSON and let JRJI clean it up.
Open the JSON Fixer