The JSON viewer
for Windows.
A native Windows 10 & 11 app — install it like any other program and open JSON straight from Explorer. Pandia handles multi-gigabyte files without freezing and never sends your data anywhere.
Windows 10 / 11 · .msi or .exe · Offline · Apache-2.0
A native app, not a web tab
Online JSON tools load your whole file into a browser tab and choke on anything large. Pandia is a
real Windows application built with Rust + Tauri: it installs from a .msi
or portable .exe, uses the lightweight WebView2 runtime already on Windows, and opens in a
blink — no Electron, no gigabyte install.
What you get
Five views
Tree, Code, Grid, Graph and Compare — switch with Ctrl 1–4.
Type generation
TypeScript, C#-friendly JSON Schema, Rust, Go, Python and more.
Large files
Multi-GB JSON opens instantly — no cap on opening or viewing.
Fully offline
No upload, no accounts, no telemetry. Your data stays local.
Install on Windows
- Download the .msi installer or the portable .exe setup (both 64-bit).
- Run it — Windows may show a SmartScreen prompt; choose More info → Run anyway.
- Launch Pandia and drag a JSON file onto the window, or open it with Ctrl O.
Detailed steps are in the installation guide.
Frequently asked questions
Should I download the .msi or the .exe?
Either works. The .msi is a standard Windows installer that registers Pandia and file associations; the .exe is a self-contained setup. Both are 64-bit builds for Windows 10 and 11.
Does it run on Windows 10 and Windows 11?
Yes — Pandia supports 64-bit Windows 10 and Windows 11. It uses the built-in WebView2 runtime that ships with current Windows.
Is the Windows JSON viewer free?
Yes. Pandia is free and open source under Apache-2.0 — no paid tiers, no accounts, no telemetry.
Can it open very large JSON files on Windows?
Yes. There is no cap on opening or viewing — Pandia streams multi-gigabyte files and only loads the on-screen slice, so big files open instantly instead of hanging.
Stop fighting your JSON.
Download the native app, open your biggest file, and get to work. Free, offline, and open source.