diff --git a/bin/sitemapper.js b/bin/sitemapper.js
index aaf58d1..b19653e 100755
--- a/bin/sitemapper.js
+++ b/bin/sitemapper.js
@@ -1,29 +1,190 @@
 #!/usr/bin/env node
 
 import Sitemapper from '../lib/assets/sitemapper.js';
+import { parseArgs } from 'node:util';
+import fs from 'node:fs';
+
+// Get version from the package.json file - hardcoded for simplicity
+const VERSION = '4.0.3';
 
 async function main() {
-  const sitemapUrl = process.argv[2];
+  const { values, positionals } = parseArgs({
+    args: process.argv.slice(2),
+    options: {
+      // Core options
+      help: { type: 'boolean', short: 'h' },
+      version: { type: 'boolean', short: 'v' },
+      url: { type: 'string', short: 'u' },
+      // Output formatting
+      format: { type: 'string', short: 'f', default: 'plaintext' },
+      output: { type: 'string', short: 'o' },
+      // Sitemapper options
+      timeout: { type: 'string', short: 't' },
+      debug: { type: 'boolean', short: 'd' },
+      concurrency: { type: 'string', short: 'c' },
+      retries: { type: 'string', short: 'r' },
+      lastmod: { type: 'string', short: 'l' },
+      'reject-unauthorized': { type: 'boolean' },
+      fields: { type: 'string' },
+      'user-agent': { type: 'string' },
+      exclusions: { type: 'string' },
+    },
+    allowPositionals: true,
+  });
+
+  // Handle help command
+  if (values.help) {
+    displayHelp();
+    return;
+  }
+
+  // Handle version command
+  if (values.version) {
+    console.log(`sitemapper v${VERSION}`);
+    return;
+  }
+
+  // Get URL from positional argument or --url option
+  const sitemapUrl = positionals[0] || values.url;
 
   if (!sitemapUrl) {
-    console.error('Please provide a sitemap URL');
-    console.error('Usage: npx sitemapper <sitemap-url>');
+    console.error('Error: Please provide a sitemap URL');
+    console.error('Run with --help for usage information');
     process.exit(1);
   }
 
   try {
-    const sitemapper = new Sitemapper();
-    const { url, sites } = await sitemapper.fetch(sitemapUrl);
-
-    console.log('\nSitemap URL:', url);
-    console.log('\nFound URLs:');
-    sites.forEach((site, index) => {
-      console.log(`${index + 1}. ${site}`);
-    });
+    // Parse options for sitemapper
+    const options = {
+      url: sitemapUrl,
+      debug: values.debug || false,
+      rejectUnauthorized: values['reject-unauthorized'] !== false,
+    };
+
+    // Add numeric options if provided
+    if (values.timeout) options.timeout = parseInt(values.timeout, 10);
+    if (values.concurrency) {
+      options.concurrency = parseInt(values.concurrency, 10);
+    }
+    if (values.retries) options.retries = parseInt(values.retries, 10);
+    if (values.lastmod) options.lastmod = parseInt(values.lastmod, 10);
+
+    // Add request headers if user-agent is provided
+    if (values['user-agent']) {
+      options.requestHeaders = {
+        'User-Agent': values['user-agent'],
+      };
+    }
+
+    // Parse fields option
+    if (values.fields) {
+      options.fields = {};
+      const fieldsList = values.fields.split(',');
+      for (const field of fieldsList) {
+        options.fields[field.trim()] = true;
+      }
+    }
+
+    // Parse exclusions option
+    if (values.exclusions) {
+      options.exclusions = values.exclusions
+        .split(',')
+        .map((pattern) => new RegExp(pattern.trim()));
+    }
+
+    const sitemapper = new Sitemapper(options);
+    const result = await sitemapper.fetch(sitemapUrl);
+
+    // Format the output based on format option
+    let output;
+    switch (values.format.toLowerCase()) {
+      case 'json':
+        output = JSON.stringify(result, null, 2);
+        break;
+      case 'csv':
+        if (options.fields) {
+          // Create header row
+          const headers = Object.keys(options.fields).join(',');
+          // Create data rows
+          const rows = result.sites.map((site) => {
+            if (typeof site === 'string') {
+              return site;
+            }
+            return Object.keys(options.fields)
+              .map((field) => site[field] || '')
+              .join(',');
+          });
+          output = [headers, ...rows].join('\n');
+        } else {
+          // Simple CSV with just URLs
+          output = result.sites.join('\n');
+        }
+        break;
+      case 'plaintext':
+      default:
+        output = `Sitemap URL: ${result.url}\n\nFound URLs (${result.sites.length}):\n`;
+        result.sites.forEach((site, index) => {
+          if (typeof site === 'string') {
+            output += `${index + 1}. ${site}\n`;
+          } else {
+            output += `${index + 1}. ${JSON.stringify(site)}\n`;
+          }
+        });
+        if (result.errors.length > 0) {
+          output += `\nErrors (${result.errors.length}):\n`;
+          result.errors.forEach((error, index) => {
+            output += `${index + 1}. ${error.message} (${error.url})\n`;
+          });
+        }
+        break;
+    }
+
+    // Output results
+    if (values.output) {
+      fs.writeFileSync(values.output, output);
+      console.log(`Results written to ${values.output}`);
+    } else {
+      console.log(output);
+    }
   } catch (error) {
     console.error('Error:', error.message);
     process.exit(1);
   }
 }
 
+function displayHelp() {
+  console.log(`
+sitemapper v${VERSION}
+
+Usage:
+  npx sitemapper <sitemap-url> [options]
+
+Options:
+  -h, --help                   Show this help message and exit
+  -v, --version                Show version information and exit
+  -u, --url <url>              Sitemap URL to crawl (alternative to positional arg)
+  -o, --output <file>          Write results to a file instead of stdout
+  -f, --format <format>        Output format (plaintext, csv, json) [default: plaintext]
+  -t, --timeout <ms>           Maximum timeout in ms for a single URL [default: 15000]
+  -d, --debug                  Enable debug logging
+  -c, --concurrency <number>   Maximum number of concurrent sitemap threads [default: 10]
+  -r, --retries <number>       Maximum number of retries for failed requests [default: 0]
+  -l, --lastmod <timestamp>    Minimum lastmod timestamp value for URLs to include
+  --reject-unauthorized        Reject invalid SSL certificates [default: true]
+  --user-agent <string>        Set a custom User-Agent header
+  --fields <fields>            Comma-separated list of fields to include in output
+                               (loc,lastmod,changefreq,priority,sitemap,
+                                image:loc,image:title,image:caption,
+                                video:title,video:description,video:thumbnail_loc)
+  --exclusions <patterns>      Comma-separated list of regex patterns to exclude URLs
+
+Examples:
+  npx sitemapper https://example.com/sitemap.xml
+  npx sitemapper https://example.com/sitemap.xml --format json
+  npx sitemapper https://example.com/sitemap.xml --fields loc,lastmod,priority --format csv
+
+For more information, visit: https://github.com/seantomburke/sitemapper
+`);
+}
+
 main();