Crawlberg

Crawlberg

Turn any website into clean, structured data. Point Crawlberg at a URL and get back Markdown, metadata, and links — from a single page or a whole site — in the language you already use.

What and Why?

You need data that lives on the web, and raw HTML is not it. Crawlberg does the crawling, scraping, and cleanup end-to-end: it fetches pages, follows links, converts each one to Markdown, and hands you structured metadata (titles, links, images, social-card and JSON-LD data) — so you skip the parsing and go straight to the content.

It runs from a single Rust core with identical results across 14 language bindings, and it handles the awkward parts for you: JavaScript-heavy pages fall back to a real headless browser, bot filters are detected and worked around, robots and sitemaps are respected, requests are throttled per domain, and requests to private or internal addresses are refused by default. Drive it from your code, an AI agent, a REST service, or the CLI.

Every part of the pipeline is a trait you can swap — the crawl frontier, rate limiter, storage, event stream, and content filters — so you can plug in your own behavior. Managed extras like proxy pools, tuned bot-evasion, authenticated sessions, scheduling, and billing live in xberg-enterprise.

Features

Supported Platforms

Precompiled binaries for glibc Linux (x86_64/aarch64), macOS, and Windows across every binding. On musl Linux (Alpine) coverage is deliberately partial — the CLI, Docker image, Rust, Ruby, Java, and Elixir work there; the Node, Python, Go, PHP, and C# bindings do not ship musl artifacts. See the platform support matrix for the full table and the Alpine workarounds.

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Quick Start

Language Packages

Python

pip install crawlberg

See Python README for full documentation.

Node.js

pnpm add @xberg-io/crawlberg

See Node.js README for full documentation.

Rust

cargo add crawlberg

See Rust README for full documentation.

Go

go get github.com/xberg-io/crawlberg/packages/go

See Go README for full documentation.

Java

Available on Maven Central as io.xberg.crawlberg:crawlberg. See Java README for the dependency snippet and current version.

C#

dotnet add package XbergIo.Crawlberg

See C# README for full documentation.

Ruby

gem install crawlberg

See Ruby README for full documentation.

PHP

composer require xberg-io/crawlberg

See PHP README for full documentation.

Elixir

Add {:crawlberg, "~> 0.3"} to your mix.exs dependencies. See Elixir README for full documentation.

Dart / Flutter

dart pub add crawlberg

See Dart README for full documentation.

Kotlin (Android)

Available on Maven Central as io.xberg.crawlberg.android:crawlberg-android. See Kotlin README for the dependency snippet and current version.

Swift

Add via Swift Package Manager. See Swift README for full documentation.

Zig

See Zig README for installation and usage.

WebAssembly

pnpm add @xberg-io/crawlberg-wasm

See WebAssembly README for full documentation.

C/C++ (FFI)

C header + shared library from GitHub Releases. See FFI crate for full documentation.

CLI

cargo install crawlberg-cli

# Or install the prebuilt binary via cargo-binstall:

cargo binstall crawlberg-cli

brew install xberg-io/tap/crawlberg

Windows users can install the same binary through Scoop:

scoop bucket add xberg https://github.com/xberg-io/scoop-bucket

scoop install crawlberg

See CLI README for full documentation.

AI Coding Assistants

Install the Crawlberg plugin from xberg-io/crawlberg. It ships the Crawlberg agent skills (site crawling, HTML→Markdown scraping, headless-Chrome fallback) plus the crawlberg MCP server, — select your runtime below.

The bundle targets Claude Code, Codex, Cursor, Gemini CLI, Kimi, OpenCode, Factory Droid, Hermes, Pi, Agent Plugins and GitHub Copilot CLI. Read the plugin guide for runtime resources, CLI prerequisites and configuration. MCP-capable adapters expose the product's tools; Hermes u