Common tasks

The three things people open JSONPeek for.

Read a messy API response

Open the endpoint in a tab (or from your app). JSONPeek renders the response as a collapsible tree. Use the search box to filter to a key path, and collapse noisy branches to focus on what matters.

Convert JSON to YAML or CSV

Open the popup, bring in your JSON, and choose the target format:

• YAML — for config files and readability.
• CSV — for a flat array of objects you want in a spreadsheet.

Copy the result with one click. Large integers are preserved exactly.

Inspect a response body while debugging

Reading what an API returned is the same workflow as inspecting what a request rule rewrote. If you also need to intercept, redirect or mock those requests, NetworkRules picks up where JSONPeek leaves off — same local-first, minimal-permission approach.