Go
Go is an open source high-level programming language.
What detecting Go tells you about a site
Go is a compiled backend language with no browser presence, so you infer it from the server's behaviour: a `Server` header naming a Go HTTP stack, the absence of a heavy framework signature, very fast and consistent response times, and sometimes the default `net/http` fingerprint. Detecting it typically points to infrastructure, APIs, proxies or high-throughput services where Go's concurrency model and single-binary deployment are the draw — often a platform or DevOps-leaning team.
The detail that matters for Go
Go is hard to attribute with confidence. The standard library's `net/http` emits no `Server` header by default, so many Go services are invisible at the language level — you infer Go by elimination (none of the PHP/Java/Ruby tells, plus fast, flat response times) or from a Go-built proxy that does announce itself, such as Caddy or Traefik. Treat a positive Go read as lower-confidence than a header-leaking stack unless a framework or proxy names it.
Go in a real-world stack
When you find Go, it rarely travels alone. Standard-library `net/http`, Gin, Echo or Chi as the router; frequently fronting a separate JavaScript SPA or serving an API behind a CDN.
About
Go is an open source high-level programming language.
Categories: Programming languages
Quick facts
Detection methodology for Programming languages
Programming languages reveal themselves through extension fingerprints (`.php` URLs for PHP, `.aspx` for ASP.NET), framework-specific patterns and (for client-side runtime languages like TypeScript and Sass) the `node_modules/<lang>/package.json` entry inside the sourcemap. Bun, Node.js and Deno on the server side identify themselves via response headers when emitted (`X-Powered-By: Bun`, `X-Bun-Version`).
FAQ
How do I check if a website is using Go?
Open the page in Chrome, click the Sourcemap Explorer toolbar icon, and read the Stack tab. Go's fingerprints span response headers, asset URL prefixes, runtime globals and sourcemap paths, and the popup flags Go whenever any combination of them is found. The same checks can be reproduced manually in DevTools — see the "How we detect" section above.
What Go version can Sourcemap Explorer detect?
Go ships as a hosted programming languages rather than a bundled npm package, so version-specific detection isn't always possible. Where the platform leaks a version in response headers (`X-Powered-By`, `Server`, generator meta tags) we surface it; otherwise we report presence only.
Is Go open source?
Yes, Go is open source. The license details are listed on the official site (https://go.dev), and the codebase typically lives on a public source-control host.
Where can I read more about Go?
Official site: https://go.dev. For Sourcemap Explorer's detection guide, see the deep-dive link below or the related guides in the cross-link section.
Keep reading on Sourcemap Explorer
Practical guides
Alternative tools
Detected by Sourcemap Explorer
Open the popup on any page running Goand you'll see the exact version pulled from the bundled package.json when sourcemaps are exposed.