Captain JSON

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

We have not read this listing's manifest since we started keeping permission names. The counts above come from the last time we did.

The full permission history for this extension →

The publisher

Pirates of Bugs publishes 3 listings we track, 43 users between them.

1. Captain Spyglass — Alignment Inspector Pirates of Bugs · Productivity · Developer · published 2026-08-18 16 users
2. Captain Octopus — Local-First Bug Capture Pirates of Bugs · Productivity · Developer · published 2026-08-23 3 users

Like this one

Listings the catalog judges closest in what they say they do.

1. JSON Toolkit Describes nearly the same job, smaller audience 12 users ★ 5.0
2. JSON Formatter Pro - Validate, Query & Diff Describes nearly the same job, smaller audience 16 users
3. JSONKit — JSON Formatter & Validator Describes nearly the same job, smaller audience 5 users
4. API Payload Debugger Describes nearly the same job, smaller audience 6 users (last published figure)
5. JSON Workbench Describes nearly the same job, smaller audience 3 users (last published figure)

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.