The JSONForge Browser Extension
The JSONForge browser extension brings the toolkit's formatter, validator, and viewer directly into the pages you're already on — API responses, devtools, and raw JSON endpoints — so you don't have to copy-paste into the website every time.
What the extension does
When you land on a page serving JSON (a raw API response, a JSON file, or content-type application/json), the extension detects it and offers to render it with the same formatter and tree viewer as the website — collapsible, syntax-highlighted, and validated. It's the website's viewing power, one click away, in context.
Installing it
The extension is built for Chromium-based browsers (Chrome, Edge, Brave, Arc, Opera). Once it's released, the fastest way to install it will be the listing linked from the site header's 'Get the extension' button — one click on Add to Chrome and it runs locally, just like the website tools. Until then, everything the extension does is already available on the website itself.
Extension vs. website
Reach for the extension when you're eyeballing live API responses in the browser and want instant readability without a context switch. Use the website for heavier work — conversions (YAML, CSV, TypeScript), schema validation, repair, the placeholder API — since the full toolkit lives there. They share the same engine, so results are identical.
Privacy
The extension processes JSON locally in your tab; it doesn't transmit your data anywhere. It only needs permission to read pages that serve JSON content.
FAQ
- Is the extension free?
- Yes — the extension is free, with no account required, matching the website's free-to-use tools.
- Which browsers are supported?
- Any Chromium-based browser with access to the Chrome Web Store: Chrome, Edge, Brave, Arc, Opera, and others. Firefox support depends on demand.
- Does it send my JSON anywhere?
- No. Formatting and viewing happen locally in your tab. Your data never leaves the browser.
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