Payload — JSON & CSV Data Studio

Payload — JSON & CSV Data Studio — a premium, 100% offline digital tool by Aceplore. Runs entirely in your browser: no accounts, no subscriptions, your data never leaves your device.

A private, offline studio for JSON and CSV — format, validate, query, filter, diff, convert and infer schemas. Because it's offline, you can safely paste data you'd never put into a website.

30 built-in tools in one app. An editor with a live validity indicator; pretty-print and minify with byte savings; validation reporting the real parse error with line and column; a collapsible tree view; document inspection for type, depth, key count and size; path queries, array filtering, sorting and key selection; flatten and unflatten that round-trip exactly; JSON-to-CSV and CSV-to-JSON with header detection and type coercion; a parsed CSV table with per-column statistics; de-duplication; a real diff reporting added, removed and changed paths; shallow and deep merge; schema inference and checking; key and value explorers; string escaping; sample-data generation; snapshots with restore; a saved library and exports.

A real CSV parser — quoted commas, embedded newlines and escaped quotes all handled correctly, not a naive split.

What's included:

• Payload.html
• Quick-Start-Guide.html
• How-To-Use-Guide.html
• README.txt
• LICENSE.txt

Includes a personalized welcome wizard, an interactive guided tour, a ⌘K command palette, light/dark themes with 8 accents, and one-click JSON backup & restore.

A developer utility that runs entirely in your browser and never sends your data anywhere. Always review results before relying on them.