diff --git a/cli/index.js b/cli/index.js
index 4c50494cd..f78467488 100755
--- a/cli/index.js
+++ b/cli/index.js
@@ -1,8 +1,29 @@
 #!/usr/bin/env node
 
+const build = require('../lib/build.js');
+
 const cmd = process.argv[2];
+const start = Date.now();
 
 if (cmd === 'build') {
-	process.env.NODE_ENV = 'production';
-	require('../lib/build.js')();
-}
\ No newline at end of file
+	build()
+		.then(() => {
+			const elapsed = Date.now() - start;
+			console.error(`built in ${elapsed}ms`); // TODO beautify this, e.g. 'built in 4.7 seconds'
+		})
+		.catch(err => {
+			console.error(err ? err.details || err.stack || err.message || err : 'Unknown error');
+		});
+} else if (cmd === 'extract') {
+	const start = Date.now();
+
+	build()
+		.then(() => require('../lib/utils/extract.js')())
+		.then(() => {
+			const elapsed = Date.now() - start;
+			console.error(`extracted in ${elapsed}ms`); // TODO beautify this, e.g. 'built in 4.7 seconds'
+		})
+		.catch(err => {
+			console.error(err ? err.details || err.stack || err.message || err : 'Unknown error');
+		});
+}
diff --git a/lib/build.js b/lib/build.js
index f51fa7f5e..445a0ce61 100644
--- a/lib/build.js
+++ b/lib/build.js
@@ -1,3 +1,5 @@
+process.env.NODE_ENV = 'production';
+
 const fs = require('fs');
 const path = require('path');
 const mkdirp = require('mkdirp');
@@ -14,29 +16,32 @@ module.exports = () => {
 	// create main.js and server-routes.js
 	create_app();
 
-	function handleErrors(err, stats) {
-		if (err) {
-			console.error(err ? err.details || err.stack || err.message || err : 'Unknown error');
-			process.exit(1);
-		}
+	return new Promise((fulfil, reject) => {
+		function handleErrors(err, stats) {
+			if (err) {
+				reject(err);
+				process.exit(1);
+			}
 
-		if (stats.hasErrors()) {
-			console.log(stats.toString({ colors: true }));
-			process.exit(1);
+			if (stats.hasErrors()) {
+				console.error(stats.toString({ colors: true }));
+				reject(new Error(`Encountered errors while building app`));
+			}
 		}
-	}
 
-	client.run((err, clientStats) => {
-		handleErrors(err, clientStats);
-		const clientInfo = clientStats.toJson();
-		fs.writeFileSync(path.join(dest, 'stats.client.json'), JSON.stringify(clientInfo, null, '  '));
+		client.run((err, clientStats) => {
+			handleErrors(err, clientStats);
+			const clientInfo = clientStats.toJson();
+			fs.writeFileSync(path.join(dest, 'stats.client.json'), JSON.stringify(clientInfo, null, '  '));
 
-		server.run((err, serverStats) => {
-			handleErrors(err, serverStats);
-			const serverInfo = serverStats.toJson();
-			fs.writeFileSync(path.join(dest, 'stats.server.json'), JSON.stringify(serverInfo, null, '  '));
+			server.run((err, serverStats) => {
+				handleErrors(err, serverStats);
+				const serverInfo = serverStats.toJson();
+				fs.writeFileSync(path.join(dest, 'stats.server.json'), JSON.stringify(serverInfo, null, '  '));
 
-			generate_asset_cache(clientInfo, serverInfo);
+				generate_asset_cache(clientInfo, serverInfo);
+				fulfil();
+			});
 		});
 	});
-};
\ No newline at end of file
+};
diff --git a/lib/utils/extract.js b/lib/utils/extract.js
new file mode 100644
index 000000000..eaa7e9309
--- /dev/null
+++ b/lib/utils/extract.js
@@ -0,0 +1,236 @@
+const fs = require('fs-extra');
+const app = require('express')();
+const compression = require('compression');
+const mkdirp = require('mkdirp');
+const sapper = require('../index.js');
+const serve = require('serve-static');
+const Spider = require('node-spider');
+const path = require('path');
+
+const { PORT = 3000, OUTPUT_DIR = 'dist' } = process.env;
+const { dest } = require('../config.js');
+
+const prefix = `http://localhost:${PORT}`;
+
+/**
+ * Returns the full URL of the specified path in the server.
+ * @param {string} url The path for which to get the complete URL.
+ * @return {string} The full URL.
+ */
+function getFullUrl(url) {
+  if (url.startsWith(prefix)) return url;
+  return `${prefix}${url}`;
+}
+
+/**
+ * Returns the extension on the URL or '' if there is none.
+ * @param {string} url The URL.
+ * @return {string} The URL's extension or the empty string if the URL has no
+ *     extension.
+ */
+function getExtension(url) {
+  const splits = url.split('.');
+  let extension = splits[splits.length - 1].trim();
+  if (!/^[a-zA-Z0-9]+$/.test(extension) || extension.length > 10) {
+    // Clear the extension if it is not alphanumeric or is long enough to
+    // signify it may just be a hash value or something.
+    extension = '';
+  }
+  return extension;
+}
+
+/**
+ * Returns the relative path for the specified URL, adding index.html if the URL
+ * ends in `/`. This makes the URL function well in a static site.
+ * @param {string} url The URL for which to retrieve the relative path.
+ * @return {string} A URL that starts with / that is relative to the server
+ *     root. The URL will add index.html if it ends with `/`.
+ */
+function relativePath(url) {
+  if (url.startsWith(prefix)) return relativePath(url.substr(prefix.length));
+  if (url.endsWith('/')) url += 'index.html';
+  if (getExtension(url) == '') url += '/index.html';
+  if (url.startsWith('/')) return url;
+  throw new Error('Bad url');
+}
+
+/**
+ * Returns the Sapper API route for the specified URL path.
+ * @param {string} url The absolute or relative URL.
+ * @param {string=} apiPrefix The prefix for Sapper server-side routes.
+ * @return {string} The URL with /api/ in front.
+ */
+function apiPath(url, apiPrefix = '/api') {
+  if (url.startsWith(prefix)) {
+    return `${prefix}${apiPrefix}${url.substr(prefix.length)}`;
+  }
+  return `${apiPrefix}${url}`;
+}
+
+/**
+ * Returns whether the specified URL is on the server or an external link.
+ * @param {string} url The URL.
+ * @return {boolean} True if the URL is on the server.
+ */
+function filter(url) {
+  return url.startsWith('/') || url.startsWith(getFullUrl('/'));
+}
+
+/**
+ * Retrieves chunk files that are normally cached for offline use in the service
+ * worker.
+ * @return {!Array<string>}
+ */
+function getChunkFiles() {
+  const clientInfo =
+      fs.readJsonSync(path.join(dest, 'stats.client.json'));
+  const chunkFiles = clientInfo.assets.map(chunk => `/client/${chunk.name}`);
+  return chunkFiles;
+}
+
+/**
+ * Exports the Sapper app as a static website by starting at the root and
+ * crawling pages that are linked, extracting server and client routes, and
+ * copying assets.
+ * @param {?Array<string>=} includeUrls If non-null, a set of additional URLs to
+ *     scrape in the extraction. This should only be set if there are routes
+ *     that cannot be reached from the root.
+ * @param {?Array<string>=} excludeUrls If non-null, a set of URLs to avoid
+ *     scraping in the extraction.
+ * @param {string=} apiPrefix The path in which all server-side Sapper routes
+ *     are defined. The Sapper template application uses '/api' -- if you
+ *     diverge from the template app structure, you will want to change this. If
+ *     your server-side Sapper routes span multiple directories, you will have
+ *     to specify each file manually with the `includeUrls` param.
+ * @param {number=} extractionDir The directory in which to place the extracted
+ *     output.
+ */
+module.exports = function(includeUrls = null, excludeUrls = null,
+    apiPrefix = '/api', extractionDir = OUTPUT_DIR) {
+
+  // Clean the output directory and copy assets in.
+  fs.removeSync(extractionDir);
+  mkdirp.sync(extractionDir);
+  fs.copySync('assets', extractionDir);
+
+  // Set up the server.
+
+  // this allows us to do e.g. `fetch('/api/blog')` on the server
+  const fetch = require('node-fetch');
+  global.fetch = (url, opts) => {
+    if (url[0] === '/') url = `http://localhost:${PORT}${url}`;
+    return fetch(url, opts);
+  };
+
+  app.use(compression({ threshold: 0 }));
+
+  app.use(serve('assets'));
+
+  app.use(sapper());
+
+  // If exclude URLs are set, normalize them.
+  if (excludeUrls == null) excludeUrls = [];
+  excludeUrls = excludeUrls.map((url) => getFullUrl(url));
+
+  // The crux of the extraction, chaining the traditional server call with a web
+  // scraper. The program automatically exits after all the static pages have
+  // been scraped from the server that are accessible from the root page (`/`).
+  const extractedFiles = []; // keep track of extracted files.
+
+  return new Promise((resolve, reject) => {
+    const server = app.listen(PORT, () => {
+      console.log(`listening on port ${PORT} and beginning extraction`);
+
+      const spider = new Spider({
+        concurrent: 5,
+        delay: 0,
+        logs: process.stderr,
+        allowDuplicates: false,
+        catchErrors: true,
+        addReferrer: false,
+        xhr: false,
+        keepAlive: false,
+        error: (err, url) => {
+          console.error(`ERROR ${err} at ${url}`);
+          reject();
+        },
+        // Called when there are no more requests
+        done: () => {
+          server.close(() => {
+            console.log('Done!');
+            resolve();
+          });
+        },
+
+        headers: { 'user-agent': 'node-spider' },
+        // Use a binary encoding to preserve image files.
+        encoding: 'binary'
+      });
+
+      // The primary logic to handle a scraped page.
+      const handleRequest = (doc) => {
+        // Only deal with the page if it is on the server, i.e. it is not an
+        // external link.
+        if (!filter(doc.url)) return;
+        // Skip URL if it is in the exclude list.
+        if (excludeUrls.includes(getFullUrl(doc.url))) return;
+
+        // Grab the page's relative path and write the page contents to a local
+        // file.
+        const relPath = relativePath(doc.url);
+        extractedFiles.push(relPath);
+        console.log(`GOT ${relPath}`); // static page url
+        fs.outputFileSync(path.join(extractionDir, relPath), doc.res.body,
+            {encoding: 'binary'});
+
+        /**
+         * Resolves and checks if a given URL is local; if so, adds it to the
+         * scraping queue.
+         * @param {string} url The URL to process.
+         */
+        const process = (url) => {
+          // Remove trailing hash if relevant.
+          url = url.split('#')[0];
+          // Resolve URL relative to server root.
+          url = doc.resolve(url);
+          // Crawl more if the URL is on the server.
+          if (filter(url)) spider.queue(url, handleRequest);
+        };
+
+        const extension = getExtension(relPath);
+        if (extension == 'html') {
+          // Grab src and href attributes from html pages.
+          doc.$('[src]').each((i, elem) => {
+            process(doc.$(elem).attr('src'));
+          });
+          doc.$('[href]').each((i, elem) => {
+            process(doc.$(elem).attr('href'));
+          });
+        }
+
+        if (doc.url.endsWith('/service-worker.js')) {
+          // Grab additional routes.
+          const chunkFiles = getChunkFiles();
+          chunkFiles.forEach(
+              (url) => spider.queue(getFullUrl(url), handleRequest));
+        }
+
+        if (relPath.endsWith('/index.html') &&
+            !relPath.startsWith(`${apiPrefix}/`)) {
+          // Attempt to grab the server-side route corresponding to a page that
+          // seems to be a basic route.
+          spider.queue(apiPath(doc.url, apiPrefix), handleRequest);
+        }
+      };
+
+      // Start crawling with the document root and the service worker.
+      spider.queue(getFullUrl('/'), handleRequest);
+      spider.queue(getFullUrl('/service-worker.js'), handleRequest);
+
+      if (includeUrls !== null) {
+        includeUrls.forEach(
+            (url) => spider.queue(getFullUrl(url), handleRequest));
+      }
+    });
+  });
+};
diff --git a/package-lock.json b/package-lock.json
index 4d0d57135..59f3edb21 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,7 +14,6 @@
       "version": "1.3.4",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.4.tgz",
       "integrity": "sha1-hiRnWMfdbSGmR0/whKR0DsBesh8=",
-      "dev": true,
       "requires": {
         "mime-types": "2.1.17",
         "negotiator": "0.6.1"
@@ -343,6 +342,39 @@
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-1.11.0.tgz",
       "integrity": "sha1-RqoXUftqL5PuXmibsQh9SxTGwgU="
     },
+    "bl": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-1.0.3.tgz",
+      "integrity": "sha1-/FQhoo/UImA2w7OJGmaiW8ZNIm4=",
+      "requires": {
+        "readable-stream": "2.0.6"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.0.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz",
+          "integrity": "sha1-j5A0HmilPMySh4jaz80Rs265t44=",
+          "requires": {
+            "core-util-is": "1.0.2",
+            "inherits": "2.0.3",
+            "isarray": "1.0.0",
+            "process-nextick-args": "1.0.7",
+            "string_decoder": "0.10.31",
+            "util-deprecate": "1.0.2"
+          }
+        },
+        "string_decoder": {
+          "version": "0.10.31",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+          "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ="
+        }
+      }
+    },
+    "bluebird": {
+      "version": "2.11.0",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-2.11.0.tgz",
+      "integrity": "sha1-U0uQM8AiyVecVro7Plpcqvu2UOE="
+    },
     "bn.js": {
       "version": "4.11.8",
       "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.8.tgz",
@@ -377,6 +409,11 @@
         }
       }
     },
+    "boolbase": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
+      "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24="
+    },
     "boom": {
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/boom/-/boom-4.3.1.tgz",
@@ -518,8 +555,7 @@
     "bytes": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.0.0.tgz",
-      "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
-      "dev": true
+      "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg="
     },
     "caller-path": {
       "version": "0.1.0",
@@ -608,6 +644,25 @@
       "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
       "dev": true
     },
+    "cheerio": {
+      "version": "0.19.0",
+      "resolved": "https://registry.npmjs.org/cheerio/-/cheerio-0.19.0.tgz",
+      "integrity": "sha1-dy5wFfLuKZZQltcepBdbdas1SSU=",
+      "requires": {
+        "css-select": "1.0.0",
+        "dom-serializer": "0.1.0",
+        "entities": "1.1.1",
+        "htmlparser2": "3.8.3",
+        "lodash": "3.10.1"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "3.10.1",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
+          "integrity": "sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y="
+        }
+      }
+    },
     "chokidar": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-1.7.0.tgz",
@@ -779,7 +834,6 @@
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.5.tgz",
       "integrity": "sha1-k4NwpXtKUd6ix3wV1cX9+JUWQAk=",
-      "dev": true,
       "requires": {
         "delayed-stream": "1.0.0"
       }
@@ -787,8 +841,7 @@
     "commander": {
       "version": "2.11.0",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.11.0.tgz",
-      "integrity": "sha512-b0553uYA5YAEGgyYIGYROzKQ7X5RAqedkfjiZxwi0kL1g3bOaBNNZfYkzt/CL0umgD5wc9Jec2FbB98CjkMRvQ==",
-      "dev": true
+      "integrity": "sha512-b0553uYA5YAEGgyYIGYROzKQ7X5RAqedkfjiZxwi0kL1g3bOaBNNZfYkzt/CL0umgD5wc9Jec2FbB98CjkMRvQ=="
     },
     "compare-versions": {
       "version": "2.0.1",
@@ -796,6 +849,38 @@
       "integrity": "sha1-Htwfk2h/2XoyXFn1XkWgfbEGrKY=",
       "dev": true
     },
+    "compressible": {
+      "version": "2.0.12",
+      "resolved": "https://registry.npmjs.org/compressible/-/compressible-2.0.12.tgz",
+      "integrity": "sha1-xZpcmdt2dn6YdlAOJx72OzSTvWY=",
+      "requires": {
+        "mime-db": "1.30.0"
+      }
+    },
+    "compression": {
+      "version": "1.7.1",
+      "resolved": "https://registry.npmjs.org/compression/-/compression-1.7.1.tgz",
+      "integrity": "sha1-7/JgPvwuIs+G810uuTWJ+YdTc9s=",
+      "requires": {
+        "accepts": "1.3.4",
+        "bytes": "3.0.0",
+        "compressible": "2.0.12",
+        "debug": "2.6.9",
+        "on-headers": "1.0.1",
+        "safe-buffer": "5.1.1",
+        "vary": "1.1.2"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.6.9",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+          "requires": {
+            "ms": "2.0.0"
+          }
+        }
+      }
+    },
     "concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -975,6 +1060,17 @@
         "source-list-map": "2.0.0"
       }
     },
+    "css-select": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/css-select/-/css-select-1.0.0.tgz",
+      "integrity": "sha1-sRIcpRhI3SZOIkTQWM7iVN7rRLA=",
+      "requires": {
+        "boolbase": "1.0.0",
+        "css-what": "1.0.0",
+        "domutils": "1.4.3",
+        "nth-check": "1.0.1"
+      }
+    },
     "css-selector-tokenizer": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/css-selector-tokenizer/-/css-selector-tokenizer-0.7.0.tgz",
@@ -986,6 +1082,11 @@
         "regexpu-core": "1.0.0"
       }
     },
+    "css-what": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/css-what/-/css-what-1.0.0.tgz",
+      "integrity": "sha1-18wt9FGAZm+Z0rFEYmOUaeAPc2w="
+    },
     "cssesc": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-0.1.0.tgz",
@@ -1042,6 +1143,11 @@
         "source-map": "0.5.7"
       }
     },
+    "ctype": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/ctype/-/ctype-0.5.3.tgz",
+      "integrity": "sha1-gsGMJGH3QRTvFsE1IkrQuRRMoS8="
+    },
     "currently-unhandled": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz",
@@ -1167,8 +1273,7 @@
     "delayed-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
-      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
-      "dev": true
+      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
     },
     "depd": {
       "version": "1.1.1",
@@ -1216,11 +1321,48 @@
         "esutils": "2.0.2"
       }
     },
+    "dom-serializer": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/dom-serializer/-/dom-serializer-0.1.0.tgz",
+      "integrity": "sha1-BzxpdUbOB4DOI75KKOKT5AvDDII=",
+      "requires": {
+        "domelementtype": "1.1.3",
+        "entities": "1.1.1"
+      },
+      "dependencies": {
+        "domelementtype": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-1.1.3.tgz",
+          "integrity": "sha1-vSh3PiZCiBrsUVRJJCmcXNgiGFs="
+        }
+      }
+    },
     "domain-browser": {
       "version": "1.1.7",
       "resolved": "https://registry.npmjs.org/domain-browser/-/domain-browser-1.1.7.tgz",
       "integrity": "sha1-hnqksJP6oF8d4IwG9NeyH9+GmLw="
     },
+    "domelementtype": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-1.3.0.tgz",
+      "integrity": "sha1-sXrtguirWeUt2cGbF1bg/BhyBMI="
+    },
+    "domhandler": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-2.3.0.tgz",
+      "integrity": "sha1-LeWaCCLVAn+r/28DLCsloqir5zg=",
+      "requires": {
+        "domelementtype": "1.3.0"
+      }
+    },
+    "domutils": {
+      "version": "1.4.3",
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     "nugget": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/nugget/-/nugget-2.0.1.tgz",
@@ -4477,8 +4902,7 @@
     "oauth-sign": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.8.2.tgz",
-      "integrity": "sha1-Rqarfwrq2N6unsBWV4C31O/rnUM=",
-      "dev": true
+      "integrity": "sha1-Rqarfwrq2N6unsBWV4C31O/rnUM="
     },
     "object-assign": {
       "version": "4.1.1",
@@ -4509,6 +4933,11 @@
         "ee-first": "1.1.1"
       }
     },
+    "on-headers": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/on-headers/-/on-headers-1.0.1.tgz",
+      "integrity": "sha1-ko9dD0cNSTQmUepnlLCFfBAGk/c="
+    },
     "once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
@@ -6147,8 +6576,7 @@
     "stringstream": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz",
-      "integrity": "sha1-TkhM1N5aC7vuGORjB3EKioFiGHg=",
-      "dev": true
+      "integrity": "sha1-TkhM1N5aC7vuGORjB3EKioFiGHg="
     },
     "strip-ansi": {
       "version": "3.0.1",
@@ -6387,7 +6815,6 @@
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.3.3.tgz",
       "integrity": "sha1-C2GKVWW23qkL80JdBNVe3EdadWE=",
-      "dev": true,
       "requires": {
         "punycode": "1.4.1"
       }
@@ -6516,6 +6943,11 @@
       "integrity": "sha1-/+3ks2slKQaW5uFl1KWe25mOawI=",
       "dev": true
     },
+    "universalify": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.1.tgz",
+      "integrity": "sha1-+nG63UQ3r0wUiEHjs7Fl+enlkLc="
+    },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
@@ -6582,8 +7014,7 @@
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
-      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=",
-      "dev": true
+      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
     },
     "vendors": {
       "version": "1.0.1",
@@ -6631,6 +7062,15 @@
         }
       }
     },
+    "walk-sync": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/walk-sync/-/walk-sync-0.3.2.tgz",
+      "integrity": "sha512-FMB5VqpLqOCcqrzA9okZFc0wq0Qbmdm396qJxvQZhDpyu0W95G9JCmp74tx7iyYnyOcBtUuKJsgIKAqjozvmmQ==",
+      "requires": {
+        "ensure-posix-path": "1.0.2",
+        "matcher-collection": "1.0.5"
+      }
+    },
     "watchpack": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-1.4.0.tgz",
diff --git a/package.json b/package.json
index 4bff0476b..844a5bf30 100644
--- a/package.json
+++ b/package.json
@@ -20,13 +20,17 @@
     "chalk": "^2.3.0",
     "chokidar": "^1.7.0",
     "code-frame": "^5.0.0",
+    "compression": "^1.7.1",
     "escape-html": "^1.0.3",
+    "fs-extra": "^5.0.0",
     "locate-character": "^2.0.5",
     "mkdirp": "^0.5.1",
+    "node-spider": "^1.4.1",
     "relative": "^3.0.2",
     "require-relative": "^0.8.7",
     "rimraf": "^2.6.2",
     "serialize-javascript": "^1.4.0",
+    "walk-sync": "^0.3.2",
     "webpack": "^3.10.0",
     "webpack-hot-middleware": "^2.21.0"
   },
diff --git a/test/app/.gitignore b/test/app/.gitignore
index 81c2c19be..9f3fcfb7d 100644
--- a/test/app/.gitignore
+++ b/test/app/.gitignore
@@ -3,4 +3,5 @@ node_modules
 .sapper
 yarn.lock
 cypress/screenshots
-templates/.*
\ No newline at end of file
+templates/.*
+dist
diff --git a/test/common/test.js b/test/common/test.js
index 6b49171b4..3d6e38670 100644
--- a/test/common/test.js
+++ b/test/common/test.js
@@ -5,6 +5,7 @@ const serve = require('serve-static');
 const Nightmare = require('nightmare');
 const getPort = require('get-port');
 const fetch = require('node-fetch');
+const walkSync = require('walk-sync');
 
 run('production');
 run('development');
@@ -78,7 +79,7 @@ function run(env) {
 
 			if (env === 'production') {
 				const cli = path.resolve(__dirname, '../../cli/index.js');
-				exec_promise = exec(`${cli} build`);
+				exec_promise = exec(`${cli} build`).then(() => exec(`${cli} extract`));
 			}
 
 			return exec_promise.then(() => {
@@ -295,6 +296,18 @@ function run(env) {
 						assert.equal(html, `URL is /show-url`);
 					});
 			});
+
+			it('calls a delete handler', () => {
+				return nightmare
+					.goto(`${base}/delete-test`)
+					.wait(() => window.READY)
+					.click('.del')
+					.wait(() => window.deleted)
+					.evaluate(() => window.deleted.id)
+					.then(id => {
+						assert.equal(id, 42);
+					});
+			});
 		});
 
 		describe('headers', () => {
@@ -312,19 +325,94 @@ function run(env) {
 				});
 			});
 		});
+
+		if (env === 'production') {
+			describe('extract', () => {
+				it('extract all pages', () => {
+					const dest = path.resolve(__dirname, '../app/dist');
+
+					// Pages that should show up in the extraction directory.
+					const expectedPages = [
+						'index.html',
+						'api/index.html',
+
+						'about/index.html',
+						'api/about/index.html',
+
+						'slow-preload/index.html',
+						'api/slow-preload/index.html',
+
+						'blog/index.html',
+						'api/blog/index.html',
+
+						'blog/a-very-long-post/index.html',
+						'api/blog/a-very-long-post/index.html',
+
+						'blog/how-can-i-get-involved/index.html',
+						'api/blog/how-can-i-get-involved/index.html',
+
+						'blog/how-is-sapper-different-from-next/index.html',
+						'api/blog/how-is-sapper-different-from-next/index.html',
+
+						'blog/how-to-use-sapper/index.html',
+						'api/blog/how-to-use-sapper/index.html',
+
+						'blog/what-is-sapper/index.html',
+						'api/blog/what-is-sapper/index.html',
+
+						'blog/why-the-name/index.html',
+						'api/blog/why-the-name/index.html',
+
+						'favicon.png',
+						'global.css',
+						'great-success.png',
+						'manifest.json',
+						'service-worker.js',
+						'svelte-logo-192.png',
+						'svelte-logo-512.png',
+					];
+					// Client scripts that should show up in the extraction directory.
+					const expectedClientRegexes = [
+						/client\/_\..*?\.js/,
+						/client\/about\..*?\.js/,
+						/client\/blog_\$slug\$\..*?\.js/,
+						/client\/blog\..*?\.js/,
+						/client\/main\..*?\.js/,
+						/client\/show_url\..*?\.js/,
+						/client\/slow_preload\..*?\.js/,
+					];
+					const allPages = walkSync(dest);
+
+					expectedPages.forEach((expectedPage) => {
+						assert.ok(allPages.includes(expectedPage),
+						    `Could not find page matching ${expectedPage}`);
+					});
+					expectedClientRegexes.forEach((expectedRegex) => {
+						// Ensure each client page regular expression matches at least one
+						// generated page.
+						let matched = false;
+						for (const page of allPages) {
+							if (expectedRegex.test(page)) {
+								matched = true;
+								break;
+							}
+						}
+						assert.ok(matched,
+							  `Could not find client page matching ${expectedRegex}`);
+					});
+				});
+			});
+		}
 	});
 }
 
 function exec(cmd) {
 	return new Promise((fulfil, reject) => {
 		require('child_process').exec(cmd, (err, stdout, stderr) => {
-			if (err) {
-				process.stdout.write(stdout);
-				process.stderr.write(stderr);
-
-				return reject(err);
-			}
+			process.stdout.write(stdout);
+			process.stderr.write(stderr);
 
+			if (err) return reject(err);
 			fulfil();
 		});
 	});