JSON Toolkit

    Offline Editor

    Local storage drafts

    Offline

    JSON Editor

    Valid JSON
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    How this tool works

    The editor buffer lives in memory; Save writes named snapshots into localStorage (same origin only). Export downloads the current text as a file. Format/minify use the sameJSON.parse / JSON.stringify flow as elsewhere in the toolkit—no server round trip.

    Tips

    • localStorage is per browser profile; clearing site data removes saved drafts.
    • Private/incognito modes may discard storage when the session ends.
    • Export important work to disk—browser storage is not a backup service.
    • Once the app shell is cached, editing works offline; sync still needs network.