FlatNest

Simple pricing

Free for daily use. Pro when you outgrow the paste box.

The online tool stays free for typical payloads. Pro unlocks large files, batch conversion, and CSV export — aimed at developers and analysts who do this every day.

Free

$0 / forever
  • Flatten & unflatten in the browser
  • Up to ~80,000 characters per paste
  • Custom separators · array index expand
  • Copy / download JSON
  • No account required
Use the tool

Pro (coming soon)

$9 one-time early bird
  • Everything in Free
  • Large files (multi‑MB)
  • Batch: multiple files → zip
  • Export flattened map as CSV
  • Priority email support
Email for early access
Payments: Checkout will use Creem or Stripe (card / Link). Until that is live, email gyb1017123121@163.com for early access — we will send a license key after payment is confirmed. No trademarks of payment brands are used as product names.