JZB Decoder

Decode jzb query-parameter payloads from DevTools network requests.

*JZB Decoder* helps you inspect `jzb=` payloads directly in Chrome DevTools. If you debug analytics beacons, telemetry calls, or other network requests that hide compressed JSON inside a URL query parameter, this extension turns opaque jzb strings into readable JSON without leaving your browser. ## What is `jzb`? `jzb` is a transport format for compressed JSON embedded in a URL query parameter. Payloads are usually: * URL-safe base64 * zlib-compressed JSON * Often, an array of analytics or telemetry events You may see `jzb=` in beacon URLs from analytics and monitoring tools. JZB Decoder is format-specific, not product-specific: it decodes the payload format itself and does not depend on any vendor SDK, API, or backend. ## Why install it? Debugging `jzb` payloads by hand is slow and error-prone. Copying a long encoded string, decoding base64, decompressing zlib, and formatting JSON takes time, especially when you are tracing multiple events across page loads. JZB Decoder automates that workflow inside DevTools so you can: * See decoded JSON as requests complete * Quickly find the event you care about * Copy clean JSON for tickets, docs, or comparisons * Paste a copied cURL command when you need to decode a request manually ## Features * Auto-capture - Watches finished network requests whose URL contains `jzb=` * Decode - Handles URL-safe base64, zlib decompression, and JSON parsing * Request list - Shows captured requests with event name or type when present in the payload * Search and filter - Filter by label, URL, method, and common event fields * Pretty JSON - Readable output with highlighted key fields * Copy JSON - One-click copy of the decoded payload * Paste cURL - Decode requests copied from the Network tab ## How to use * Install the extension * Open DevTools on any page * Select the Decipher JZB panel from the DevTools tab bar * Browse or trigger traffic that includes `jzb=` in the request URL * Select a captured request to view the decoded payload * For manual decoding, open Paste cURL, paste a copied Network request, and click Decode. ## Privacy-first by design * Decoding happens locally in your browser * No host permissions or broad site access * No analytics, accounts, or remote servers * Captured data stays in DevTools memory for the current session and is cleared when you click Clear or close DevTools Treat decoded output as sensitive. Payloads may include visitor IDs, account IDs, URLs, or other event properties from the sites you inspect. ## Who is this for? * Frontend and full-stack developers debugging analytics instrumentation * QA engineers validating event payloads during releases * Support and solutions engineers investigating customer-reported tracking issues * Anyone who regularly inspects `jzb=` network traffic in DevTools Stop decoding `jzb` by hand. Install JZB Decoder and read the payload in seconds.