go.dev

No reachable sitemap.xml. Publish one and reference it in robots.txt.

Fix: Publish /sitemap.xml and reference it from robots.txt with a Sitemap: line.

No JSON-LD blocks found. Add a <script type="application/ld+json"> with a schema.org type for this page.

Fix: Add a <script type="application/ld+json"> describing the page (Organization, Article, Product, FAQPage).

Found /llms.txt but missing H1 header and markdown links.

Fix: Publish /llms.txt at your domain root. Build a spec-compliant one at /tools/llms-txt-generator.

No HTTP Link: response headers. Emit canonical/alternate/describedby relations so HEAD-only or stream-rendering agents get them without parsing HTML.

Fix: Emit `Link:` headers for canonical, alternate-language, and describedby relations. Agents that fetch HEAD-only or stream-render rely on these.

Visible text is 11.3% of HTML weight (7233/64185 bytes). Low. Markup may be crowding out agent-usable text.

Fix: Heavy ad or navigation markup crowds out agent-usable text. Aim for a text-to-DOM ratio above 15%.

No Content-Signal directives. Add e.g. `Content-Signal: ai-train=no, ai-summarize=yes` to declare granular AI usage policy beyond binary allow/disallow.

Fix: Add `Content-Signal:` directives to your robots.txt. This is the emerging standard (Cloudflare-driven) for declaring fine-grained AI usage policy beyond a binary allow/disallow.

# The Go Programming Language

> Go is an open source programming language that makes it simple to build secure, scalable systems.

## Key pages
- [Home](https://go.dev/)
- [Build simple, secure, scalable systems with Go](https://go.dev/)
- [Companies using Go](https://go.dev/)
- [Try Go](https://go.dev/)
- [What’s possible with Go](https://go.dev/)
- [Get started with Go](https://go.dev/)

## About
Describe what go.dev does, who it's for, and the primary action you want an
agent to be able to complete. Keep it factual and current.

The Go Programming Language Skip to Main Content Why Go arrow_drop_down Press Enter to activate/deactivate dropdown Case Studies Common problems companies solve with Go Use Cases Stories about how and why companies use Go Security How Go can help keep you secure by default Learn Press Enter to activate/deactivate dropdown Docs arrow_drop_down Press Enter to activate/deactivate dropdown Go Spec The official Go language specification Go User Manual A complete introduction to building software with Go Standard library Reference documentation for Go's standard library Release Notes Learn what's new in each Go release Effective Go Tips for writing clear, performant, and idiomatic Go code Packages Press Enter to activate/deactivate dropdown Community arrow_drop_down Press Enter to activate/deactivate dropdown Recorded Talks Videos from prior events Meetups open_in_new Meet other local Go developers Conferences open_in_new Learn and network with Go developers from around the world Go blog The Go project's official blog. Go project Get help and stay informed from Go Get connected Why Go navigate_next navigate_before Why Go Case Studies Use Cases Security Learn Docs navigate_next navigate_before Docs Go Spec Go User Manual Standard library Release Notes Effective Go Packages Community navigate_next navigate_before Community Recorded Talks Meetups open_in_new Conferences open_in_new Go blog Go project Get connected Build simple, secure, scalable systems with Go An open-source programming language supported by Google Easy to learn and great for teams Built-in concurrency and a robust standard library Large ecosystem of partners, communities, and tools Get Started Download Opens a new window with the Get Started guide. Opens a new window to download Go. Download packages for Windows 64-bit , macOS , Linux , and more The go command by default downloads and authenticates modules using the Go module mirror and Go checksum database run by Google. Learn more. Opens in new window. Companies using Go Organizations in every industry use Go to power their software and services View all stories View case study View case study View case study View case study “At the time, no single team member knew Go, but within a month, everyone was writing in Go and we were building out the endpoints. It was the flexibility, how easy it was to use, and the really cool concept behind Go (how Go handles native concurrency, garbage collection, and of course safety+speed.) that helped engage us during the build. Also, who can beat that cute mascot!” — Jaime Enrique Garcia Lopez, Senior Software Development Manager at Capital One " A small language that compiles fast makes for a happy developer. The Go language is small, compiles really fast, and as a result it lets your mind focus on the actual problem and less on the tool you are using to solve it. Code, test, debug cycles are so quick that you forget you are not working with an interpreted language. Looking at our code, you see less boilerplate and more business logic. " — Clayton Coleman, Lead Engineer, Open Shift at RedHat “ Go has excellent characteristics for scalability and services written using it typically have very small memory footprints. Because code is compiled into a single static binary, services can also be containerised with ease, making it much simpler to build and deploy. These attributes make Go an ideal choice for companies building microservices , as you can easily deploy into a highly available and scalable environment such as Kubernetes.” — Matt Boyle, Lead Software Engineer at Curve "In our tightly managed environments where we run Go code, we have seen a CPU reduction of approximately 10% with cleaner and maintainable code." — Bala Natarajan, Sr. Director of Engineering, Developer Experience at PayPal "Tooling has always been a problem with our legacy code base... but we have found that Go has excellent tooling, plus built-in testing, benchmarking, and profiling frameworks. It is easy to write efficient and resilient applications. After working on Go, most of our developers don't want to go back to other languages. " — Benjamin Cane, Vice President and Principal Engineer at American Express "...when a programming language is designed for exactly the environment most of us use right now—scalable, cloud-based servers that are optimized for performance—a lot can go right." — John Biggs and Ben Popper, at Stack Overflow navigate_before navigate_next Try Go Press Esc to move out of the editor. // You can edit this code! // Click here and start typing. package main import "fmt" func main() { fmt.Println("Hello, 世界") } Press Esc to move out of the editor. Hello, World! Conway's Game of Life Fibonacci Closure Peano Integers Concurrent pi Concurrent Prime Sieve Peg Solitaire Solver Tree Comparison Run Share Tour What’s possible with Go Use Go for a variety of software development purposes Cloud & Network Services With a strong ecosystem of tools and APIs on major cloud providers, it is easier than ever to build services with Go. Popular Packages: cloud.google.com/go aws/client Azure/azure-sdk-for-go Learn More arrow_forward Command-line Interfaces With popular open source packages and a robust standard library, use Go to create fast and elegant CLIs. Popular Packages: spf13/cobra spf13/viper urfave/cli delve chzyer/readline Learn More arrow_forward Web Development With enhanced memory performance and support for several IDEs, Go powers fast and scalable web applications. Popular Packages: net/http html/template flosch/pongo2 database/sql elastic/go-elasticsearch Learn More arrow_forward DevOps & Site Reliability With fast build times, lean syntax, an automatic formatter and doc generator, Go is built to support both DevOps and SRE. Popular Packages: open-telemetry/opentelemetry-go istio/istio urfave/cli Learn More arrow_forward More use cases arrow_forward Get started with Go Explore a wealth of learning resources, including guided journeys, courses, books, and more. Get Started Download Go Resources to start on your own Guided learning journeys Step-by-step tutorials to get your feet wet Online learning Browse resources and learn at your own pace Featured books Read through structured chapters and theories Cloud Self-paced labs Jump in to deploying Go apps on GCP In-Person Trainings Ardan Labs Offering customized on-site live training classes. Gopher Guides Customized In-person, remote, and online training classes. Training for Developers by Developers. Boss Sauce Creative Personalized or track-based Go training for teams. Shiju Varghese On-site classroom training on Go and consulting on distributed systems architectures, in India. Why Go Use Cases Case Studies Get Started Playground Tour Stack Overflow Help Packages Standard Library About Go Packages pkg.go.dev API About Download Blog Issue Tracker Release Notes Brand Guidelines Code of Conduct Connect Bluesky Mastodon Twitter GitHub Slack r/golang Meetup Golang Weekly Opens in new window. Copyright Terms of Service Privacy Policy Report an Issue go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more. Okay

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