macOS app

Inspect JSON in seconds.

Paste any payload, format instantly, search keys and values, and explore deeply nested structures without losing your place.

  • Two‑pane workflow: raw editor + tree view
  • Saved JSON library for repeat requests
  • Search, collapse/expand, and keyboard shortcuts
JSON Assistant showing a JSON editor on the left and a formatted tree view on the right.
Privacy
Runs locally. Your data stays on your Mac.
Fast
Built for quick debugging and iteration.
Polished
Light + dark mode, shortcuts, and search.

Everything you need to tame JSON.

A focused tool for API debugging, webhook payloads, and everyday copy/paste chaos.

Two-pane workflow

Paste or edit raw JSON on the left, then explore a clean tree view on the right.

Saved JSON library

Keep frequently-used payloads handy—perfect for repetitive debugging and webhooks.

Search inside JSON

Find keys and values instantly in the formatted view, even inside deeply nested structures.

Collapse & expand

Quickly fold large payloads, expand what matters, and keep context without endless scrolling.

Offline by default

No accounts. No uploading. Work with sensitive data knowing it stays local.

Looks great everywhere

Thoughtful typography, spacing, and colors—plus light and dark mode that match macOS.

Light mode, dark mode—both included.

Switch themes on this page to preview the app’s look and feel.

JSON Assistant screenshot preview.

Ready to make JSON less painful?

Download JSON Assistant for macOS, or browse the source on GitHub.