JSON Viewer, Formatter & Repair — braceful

Format, repair & view JSON fully offline. Fix broken JSON, open 100MB files, search & inspect — no upload, no account.

Paste, open, or drop JSON and braceful renders it instantly as a clean, collapsible tree — no account, no sign-up, no upload. The core viewer runs entirely on your device. braceful does two things ordinary JSON viewers can't: 1. It REPAIRS broken JSON. Trailing commas, single quotes, unquoted keys, missing brackets, truncated payloads, Python-style True/False/None, NaN — braceful fixes them automatically and shows you exactly what it changed, so a half-copied log line or a malformed API response is still readable. 2. It opens VERY LARGE files. Documents up to ~100 MB of valid JSON open without freezing your browser — the cases where online formatters hang or refuse the paste. WHY DEVELOPERS TRUST IT • Your JSON is never uploaded. Paste, drop, format, repair, search, and large-file viewing all run on your own device — your data never leaves your machine. • No tracking. No analytics, no telemetry, no remote code. Nothing is downloaded or executed from the network. • Minimal permissions. Zero website access by default. "Auto-open JSON pages" is off until you turn it on; only then does braceful re-fetch the page you opened so it can render it. • Open it your way. Paste it, drop a file, or let braceful take over raw .json pages (optional, Chrome). WHAT YOU GET (FREE, FOREVER) • Collapsible tree view + raw view • One-click format / prettify • Automatic broken-JSON repair with a clear diff of what was fixed • Fast search across keys and values • Large-file handling that doesn't lock up the tab • Light / dark themes PRO TOOLS (OPTIONAL) Power features — Convert, JSON Schema, Diff, and a live query (filter/projection) view — come with Pro. Like the free core, they run entirely on your device. The only thing that ever talks to a server is activating your license key, and that request sends the key and nothing else — never your JSON. The free tier is fully functional on its own. PRIVACY BY DESIGN A JSON viewer sees everything you paste. braceful is built so that the thing seeing your data is your own browser, not a server. That's the whole point. View, format, and repair JSON — fully offline.