XML Sitemap Generator

Format and Validation Errors

• •Missing XML declaration or incorrect namespace causing sitemap rejection
• •Unescaped special characters (&, <, >, ', ") breaking XML parsing
• •Relative URLs instead of absolute URLs in loc tags
• •Sitemap exceeding 50,000 URL or 50MB limits without a sitemap index
• •Incorrect date format in lastmod — must be W3C Datetime (YYYY-MM-DD or full ISO 8601)

Content Quality Issues

• •Including 404, 301, or non-200 status code URLs in the sitemap
• •Including non-canonical URLs (with tracking parameters, session IDs)
• •Setting all priority values to 1.0, making the tag meaningless
• •Using today's date as lastmod for all pages regardless of actual update dates
• •Including noindex pages that should never be submitted to search engines

Submission and Discovery

• •Sitemap not referenced in robots.txt — search engines may not find it
• •Sitemap not submitted to Google Search Console or Bing Webmaster Tools
• •Sitemap URL uses HTTP when site is HTTPS
• •Sitemap file not accessible due to server configuration or authentication

Correct XML Sitemap Structure

A properly formatted XML sitemap with all recommended tags:

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">

  <!-- Homepage — highest priority -->
  <url>
    <loc>https://www.example.com/</loc>
    <lastmod>2026-02-28</lastmod>
    <changefreq>daily</changefreq>
    <priority>1.0</priority>
  </url>

  <!-- Main section pages -->
  <url>
    <loc>https://www.example.com/tools</loc>
    <lastmod>2026-02-15</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
  </url>

  <!-- Individual tool pages -->
  <url>
    <loc>https://www.example.com/tools/json-formatter</loc>
    <lastmod>2026-01-10</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
  </url>

</urlset>

Next.js 15 Dynamic Sitemap Generation

Generate your XML sitemap programmatically in Next.js using the built-in sitemap API:

// app/sitemap.ts
import { MetadataRoute } from "next";

export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
  const baseUrl = "https://www.example.com";

  // Fetch dynamic pages from your CMS or database
  const posts = await getPosts();

  const staticPages = [
    {
      url: baseUrl,
      lastModified: new Date(),
      changeFrequency: "daily" as const,
      priority: 1.0,
    },
    {
      url: `${baseUrl}/tools`,
      lastModified: new Date("2026-02-15"),
      changeFrequency: "weekly" as const,
      priority: 0.9,
    },
  ];

  const dynamicPages = posts.map((post) => ({
    url: `${baseUrl}/blog/${post.slug}`,
    lastModified: new Date(post.updatedAt),
    changeFrequency: "monthly" as const,
    priority: 0.7,
  }));

  return [...staticPages, ...dynamicPages];
}

Add Sitemap to robots.txt

Reference your sitemap in robots.txt so all search engines can find it automatically:

# robots.txt
User-agent: *
Allow: /

# Always reference your sitemap
Sitemap: https://www.example.com/sitemap.xml

# For multiple sitemaps, reference the index
Sitemap: https://www.example.com/sitemap-index.xml

# Next.js robots.ts equivalent:
# app/robots.ts
import { MetadataRoute } from "next";

export default function robots(): MetadataRoute.Robots {
  return {
    rules: { userAgent: "*", allow: "/" },
    sitemap: "https://www.example.com/sitemap.xml",
  };
}