no telemetry · no auto-update · no network calls
39 dev tools. Zero network calls.
AirToolkit bundles the utilities you reach for daily — JSON formatting, regex testing, hashing, JWT decoding, and more — into one desktop app that never makes a network call on its own. No telemetry, no auto-update, no phone-home. Ever.
deploying via Group Policy or SCCM? grab the .msi instead
# block all outbound traffic
New-NetFirewallRule `
-DisplayName "Block-AirToolkit" `
-Program airtoolkit.exe -Action Block
# app keeps working normally▍Why offline matters
This came out of a real need, not a feature checklist.
Locked-down VMs can't reach a browser tool
Internet-restricted machines at security- and access-control-focused companies are common. Pulling up a browser-based JSON formatter or regex tester simply isn't an option there.
"Offline" web tools usually aren't
Most sites claiming to be offline-friendly still ship analytics, font CDNs, or update checks — which fail loudly, or silently phone home, the moment they're blocked.
No network dependency, period
AirToolkit makes zero network calls of its own: no telemetry, no auto-update, no phone-home. The one exception — the API Request Tester — is opt-in and documented.
How it works
Download and install
Grab the Windows installer — no account, no license key, no internet connection required to run it.
Pick a tool from the sidebar
39 tools organized into five categories, with search. Everything runs locally in the same window.
Verify it yourself
Block the app at the firewall and keep working — every tool except the API Request Tester keeps functioning normally.