Protobuf Tools & Decoders

Protobuf Tools
Tool
Language
Purpose
Link
pbtk
Python
Extract and fuzz protobuf structures from Chrome
GitHub
google-maps-pb-decoder
Ruby
Decode pb URL params to JSON
GitHub
deproto
Python
Decode, manipulate, re-encode protobuf strings (round-trip conversion)
GitHub
XHR/Network Interception
Intercept browser XHR requests during Google Maps navigation; responses contain protobuf-encoded data with "XHR1" signature. Use CDP 
Network.requestWillBeSent event + 
history.replaceState() hooks. Supported by Puppeteer request interception and Playwright route handlers.
Sources
SerpAPI — Reverse Engineering Maps Pagination
$5K Google Maps XSS via Protobuf
Scrape.do — Maps Scraping Guide