diff --git a/pom.xml b/pom.xml
index b737e5a..1fc51d8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,6 +22,7 @@
 
 		<slf4j-api.version>2.0.17</slf4j-api.version>
 		<crawler-commons.version>1.6</crawler-commons.version>
+		<jwarc.version>0.32.0</jwarc.version>
 		<gson.version>2.13.2</gson.version>
 		<guava.version>33.5.0-jre</guava.version>
 		<aws-s3-sdk.version>2.41.32</aws-s3-sdk.version>
@@ -106,6 +107,12 @@
 			</exclusions>
 		</dependency>
 
+		<dependency>
+			<groupId>org.netpreserve</groupId>
+			<artifactId>jwarc</artifactId>
+			<version>${jwarc.version}</version>
+		</dependency>
+
 		<!-- Test dependencies -->
 
 		<dependency>
diff --git a/src/main/java/org/commoncrawl/spark/GAWTableConverter.java b/src/main/java/org/commoncrawl/spark/GAWTableConverter.java
new file mode 100644
index 0000000..5b25e6c
--- /dev/null
+++ b/src/main/java/org/commoncrawl/spark/GAWTableConverter.java
@@ -0,0 +1,207 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.commoncrawl.spark;
+
+import java.io.IOException;
+import java.sql.Timestamp;
+import java.time.ZonedDateTime;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.cli.CommandLine;
+import org.apache.commons.cli.CommandLineParser;
+import org.apache.commons.cli.DefaultParser;
+import org.apache.commons.cli.Options;
+import org.apache.commons.cli.ParseException;
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.sql.Column;
+import org.apache.spark.sql.DataFrameReader;
+import org.apache.spark.sql.DataFrameWriter;
+import org.apache.spark.sql.Dataset;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.RowFactory;
+import org.apache.spark.sql.SparkSession;
+import org.commoncrawl.net.HostName;
+import org.commoncrawl.net.WarcUri;
+import org.netpreserve.jwarc.URIs;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class GAWTableConverter extends IndexTable {
+
+	private static final Logger LOG = LoggerFactory.getLogger(GAWTableConverter.class);
+	protected String name = GAWTableConverter.class.getCanonicalName();
+
+	public static Row convertRow(Row inp) {
+		try {
+			String url = inp.getString(0);
+			String timeStampString = inp.getString(1);
+			ZonedDateTime fetchTime = fetchTimeParser.parse(timeStampString, ZonedDateTime::from);
+			Timestamp timestamp = Timestamp.from(fetchTime.toInstant());
+			WarcUri uri = new WarcUri(url);
+			HostName host = uri.getHostName();
+			Row h = host.asRow();
+			List<Object> row = new ArrayList<>();
+			// url_surtkey
+			row.add(URIs.toNormalizedSurt(url));
+			// url
+			row.add(uri.getUrlString());
+			// host
+			row.add(h.get(0));
+			row.add(h.get(1));
+			row.add(h.get(2));
+			row.add(h.get(3));
+			row.add(h.get(4));
+			row.add(h.get(5));
+			row.add(h.get(6));
+			row.add(h.get(7));
+			row.add(h.get(8));
+			row.add(h.get(9));
+			row.add(h.get(10));
+			// URL components
+			row.add(uri.getProtocol());
+			row.add(uri.getPort());
+			row.add(uri.getPath());
+			row.add(uri.getQuery());
+			// capture time
+			row.add(timestamp);
+			return RowFactory.create(row.toArray());
+		} catch (Exception e) {
+			LOG.error("Failed to convert row", e);
+			return null;
+		}
+	}
+
+	public void runJob(String inputPaths, String outputPath, Function<Row, Row> mapIndexEntries) throws IOException {
+		SparkConf conf = new SparkConf();
+		conf.setAppName(this.name);
+		SparkSession spark = SparkSession.builder().config(conf).getOrCreate();
+
+		LOG.info("Function to convert table rows: {}", mapIndexEntries);
+
+		DataFrameReader reader = spark.read();
+		JavaRDD<Row> input;
+		// TODO: support input formats other than CSV
+		reader = reader.option("delimiter", "\t");
+		reader = reader.option("header", "false");
+		input = reader.csv(inputPaths).toJavaRDD();
+		JavaRDD<Row> output = input.map(mapIndexEntries);
+
+		/*
+		 * sort by "url_surtkey" to achieve better compression and better query
+		 * performance
+		 */
+		output = output.sortBy(row -> row.getString(0), true, 1);
+		// TODO: make number of output partitions configurable
+
+		if (verbose) {
+			LOG.info(schema.prettyJson());
+		}
+
+		Dataset<Row> df = spark.createDataFrame(output, schema);
+
+		if (verbose) {
+			df.printSchema();
+			// df.show(); // That's expensive in combination with sorting
+		}
+
+		// Note: cannot use nested columns for partitioning (SPARK-18084)
+		String[] partitionColumns = {};
+		if (!partitionBy.trim().isEmpty()) {
+			partitionColumns = partitionBy.trim().split("\\s*,\\s*");
+			Column[] pCols = new Column[partitionColumns.length + 1];
+			for (int i = 0; i < partitionColumns.length; i++) {
+				pCols[i] = df.col(partitionColumns[i]);
+			}
+			// enforce sorting by "url_surtkey" within each partition
+			// below the columns used for partitioning
+			pCols[pCols.length - 1] = df.col("url_surtkey");
+			df = df.sortWithinPartitions(pCols);
+		}
+
+		if (verbose) {
+			df.explain(true);
+		}
+
+		DataFrameWriter<Row> dfw = df.write().format(outputFormat);
+		dfw.option("compression", outputCompression);
+		if (partitionColumns.length > 0) {
+			dfw.partitionBy(partitionColumns);
+		}
+		dfw.save(outputPath);
+		spark.close();
+	}
+
+	@Override
+	protected CommandLine applyCommandLineOptions(CommandLine cli) {
+		// apply output options defined in IndexTable
+		super.applyCommandLineOptions(cli);
+
+		// specific input options
+		// TODO
+
+		return cli;
+	}
+
+	@Override
+	public void run(String[] args) throws IOException {
+		Options options = addCommandLineOptions(new Options());
+
+		CommandLineParser parser = new DefaultParser();
+		CommandLine cli;
+
+		try {
+			cli = parser.parse(options, args);
+		} catch (ParseException e) {
+			System.err.println(e.getMessage());
+			help(options);
+			System.exit(-1);
+			return;
+		}
+
+		if (cli.hasOption("help")) {
+			help(options);
+			return;
+		}
+
+		cli = applyCommandLineOptions(cli);
+
+		String[] arguments = cli.getArgs();
+		if (arguments.length < 2) {
+			help(options);
+			System.exit(1);
+		}
+
+		String inputPaths = arguments[0];
+		String outputPath = arguments[1];
+
+		if ("orc".equals(outputFormat) && "gzip".equals(outputCompression)) {
+			// gzip for Parquet, zlib for ORC
+			outputCompression = "zlib";
+		}
+
+		runJob(inputPaths, outputPath, GAWTableConverter::convertRow);
+	}
+
+	public static void main(String[] args) throws IOException {
+		IndexTable job = new GAWTableConverter();
+		job.run(args);
+	}
+
+}
diff --git a/src/main/resources/schema/gaw-index-schema.json b/src/main/resources/schema/gaw-index-schema.json
new file mode 100644
index 0000000..8087eee
--- /dev/null
+++ b/src/main/resources/schema/gaw-index-schema.json
@@ -0,0 +1,167 @@
+{
+  "type": "struct",
+  "fields": [
+    {
+      "name": "url_surtkey",
+      "type": "string",
+      "nullable": false,
+      "metadata": {
+        "description": "SURT URL key",
+        "example": "com,example)/path/index.html"
+      }
+    },
+    {
+      "name": "url",
+      "type": "string",
+      "nullable": false,
+      "metadata": {
+        "description": "URL string",
+        "example": "https://www.example.com/path/index.html"
+      }
+    },
+    {
+      "name": "url_host_name",
+      "type": "string",
+      "nullable": false,
+      "metadata": {
+        "description": "Hostname, including IP addresses",
+        "example": "www.example.com"
+      }
+    },
+    {
+      "name": "url_host_tld",
+      "nullable": true,
+      "type": "string",
+      "metadata": {
+        "description": "Top-level domain or last part of the hostname",
+        "example": "com for the hostname www.example.com"
+      }
+    },
+    {
+      "name": "url_host_2nd_last_part",
+      "nullable": true,
+      "type": "string",
+      "metadata": {
+        "description": "Second last part of the hostname",
+        "example": "example for the hostname www.example.com, co for bbc.co.uk"
+      }
+    },
+    {
+      "name": "url_host_3rd_last_part",
+      "nullable": true,
+      "type": "string",
+      "metadata": {
+        "description": "Third last part of the hostname",
+        "example": "www for the hostname www.example.com"
+      }
+    },
+    {
+      "name": "url_host_4th_last_part",
+      "nullable": true,
+      "type": "string",
+      "metadata": {
+        "description": "4th last part of the hostname",
+        "example": "host1 for host1.subdomain.example.com"
+      }
+    },
+    {
+      "name": "url_host_5th_last_part",
+      "nullable": true,
+      "type": "string",
+      "metadata": {
+        "description": "5th last part of the hostname",
+        "example": "host1 for host1.sub2.subdomain.example.com"
+      }
+    },
+    {
+      "name": "url_host_registry_suffix",
+      "type": "string",
+      "nullable": true,
+      "metadata": {
+        "description": "Domain registry suffix",
+        "example": "com, co.uk"
+      }
+    },
+    {
+      "name": "url_host_registered_domain",
+      "type": "string",
+      "nullable": true,
+      "metadata": {
+        "description": "Domain name of the host (one level below the registry suffix)",
+        "example": "example.com, bbc.co.uk"
+      }
+    },
+    {
+      "name": "url_host_private_suffix",
+      "type": "string",
+      "nullable": true,
+      "metadata": {
+        "description": "Suffix of domain registries including private registrars, see https://publicsuffix.org/",
+        "example": "com, co.uk, but also s3.amazonaws.com or blogspot.com"
+      }
+    },
+    {
+      "name": "url_host_private_domain",
+      "type": "string",
+      "nullable": true,
+      "metadata": {
+        "description": "Domain name of the host (one level below the private suffix)",
+        "example": "mypublicbucket.s3.amazonaws.com or myblog.blogspot.com"
+      }
+    },
+    {
+      "name": "url_host_name_reversed",
+      "type": "string",
+      "nullable": true,
+      "metadata": {
+        "description": "Hostname, excluding IP addresses, in reverse domain name notation",
+        "example": "com.example.www"
+      }
+    },
+    {
+      "name": "url_protocol",
+      "type": "string",
+      "nullable": false,
+      "metadata": {
+        "description": "Protocol of the URL",
+        "example": "https"
+      }
+    },
+    {
+      "name": "url_port",
+      "type": "integer",
+      "nullable": true,
+      "metadata": {
+        "description": "Port of the URL (null if not explicitly specified in the URL)",
+        "example": "8443"
+      }
+    },
+    {
+      "name": "url_path",
+      "type": "string",
+      "nullable": true,
+      "metadata": {
+        "description": "File path of the URL",
+        "example": "/path/index.html"
+      }
+    },
+    {
+      "name": "url_query",
+      "type": "string",
+      "nullable": true,
+      "metadata": {
+        "description": "Query part of the URL",
+        "example": "q=abc&lang=en for .../search?q=abc&lang=en"
+      }
+    },
+    {
+      "name": "fetch_time",
+      "type": "timestamp",
+      "nullable": false,
+      "metadata": {
+        "description": "Fetch time (capture time stamp)",
+        "example": "2017-10-24T00:14:32Z"
+      }
+    }
+  ]
+}