Is my JSON uploaded anywhere?

No. All processing is local. We track only anonymous events like 'format_clicked' — never your content.

How do I see 200-char lines?

Drag the center divider ↔ to widen the right panel, or scroll horizontally — panels now support overflow-x.

Drag the bottom handle ↕ to scale height from 320 to 900px. Both panels scale together.

Yes — toggle Sort and choose 2/4/Tab.

Paste on the left — see results instantly on the right.

Sort Keep

0 B · 1 lines · max 100MB · FE Worker ready

Output will appear here

Paste JSON — auto-formats. Drag edges to scale.

Documentation & FAQ▾

How it works (no scroll needed)

import { formatJson } from "@/tools/json/formatter";
formatJson(input, { indent: 2, sortKeys: true });

Pretty-prints minified JSON via JSON.parse/stringify locally — highlighted + tree without upload.

Files via File API, never uploaded, never in URLs or analytics. Works offline.

Is my JSON uploaded anywhere?: No. All processing is local. We track only anonymous events like 'format_clicked' — never your content.
How do I see 200-char lines?: Drag the center divider ↔ to widen the right panel, or scroll horizontally — panels now support overflow-x.
How do I see 100 lines?: Drag the bottom handle ↕ to scale height from 320 to 900px. Both panels scale together.
Can I sort keys or use tabs?: Yes — toggle Sort and choose 2/4/Tab.