Readable JSON instantly
Raw JSON pages become a folded, searchable tree without leaving the tab.
folding + search
JP
Developer tools · JSON
JSONPeek formats raw JSON responses inline, without uploading them.
Open a JSON response and get folding, search and local conversion helpers right in the browser. Free, local-first and built for debugging APIs quickly.
Recommended for your browser
Choose where to install
Official stores are the safest choice and provide automatic updates.
CH
Chrome
Detected: Chrome
Other browsers
Developer / manual installation
Use the ZIP only when an official store is unavailable.
- Unzip the file, open the browser's Extensions page, enable Developer mode, then choose Load unpacked.
Manual installations do not update automatically. ZIP files are not one-click installers.
Completely free · no paywall
product screenshot · JSONPeek popup
product screenshot · JSONPeek onboarding
product screenshot · JSONPeek converter
product screenshot · JSONPeek precision
product screenshot · JSONPeek permissions
Local conversion helpers
Convert JSON, YAML and CSV locally while you inspect API responses.
no uploadFree by design
No account, no paywall and no tracking. It exists to make our paid tools easier to trust.
freePrivate by construction
local-first · optional online features disclosed · no data sold
- No analytics
- No telemetry
- No third-party SDKs
- Core processing stays local; optional sync, backup, AI or sharing connects only when you enable it
Questions people ask
Is JSONPeek free?
Yes. It is a free extension with no account requirement and no paid upgrade.
Does JSON leave my browser?
No. Formatting, folding, search and conversion run locally in the browser.
Which pages does it run on?
It activates on JSON responses and local JSON files opened in the browser.
Questions & suggestions
Ask a question, request a feature or report an issue. We read every message and publish the useful ones with our answer.
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