Baidu processes both TXT and XML sitemaps as official channels to notify the crawler about your site structure, though they function differently in practice. XML files provide structured data like last modification dates, while TXT files offer a lightweight, plain-text method to list URLs. Choosing between them depends on your site size, technical resources, and how frequently your content updates.
Selecting the right format is a core part of technical SEO for the Chinese market. While some platforms prioritize one over the other, Baidu demonstrates high compatibility with both. Understanding the underlying differences allows you to provide the crawler with the most useful version of your site map.
What are the core differences between TXT and XML sitemaps?
The XML sitemap follows a standard protocol that includes extra metadata. This extra data, particularly the last modification date, helps the Baidu crawler prioritize which pages to visit first. If you have a large site, this metadata is useful for managing the crawl budget, as it allows the crawler to ignore pages that have not changed.
In contrast, a TXT sitemap is simply a list of URLs, one per line. It contains no metadata and is interpreted by the crawler as a raw directory. Because it lacks structure, the crawler treats all URLs with equal weight, which makes it less efficient for prioritizing major site updates compared to a well-structured XML file.
For developers, the XML format requires strict adherence to schema rules. An error in the XML tags or an invalid namespace can cause the entire file to be rejected by the Baidu Search Resource Platform. TXT files, however, are immune to these syntax errors, making them a safer choice for automated scripts that generate lists on the fly.
- XML sitemaps support modification timestamps to signal content freshness.
- TXT sitemaps are easier to generate for smaller, static websites.
- XML files must follow specific schema rules to be valid for submission.
- TXT files require no complex formatting, reducing the chance of syntax errors.
Which format should you use for your Baidu strategy?
For most professional websites, the XML sitemap remains the superior choice due to the efficiency it provides the crawler. Baidu encourages the use of sitemaps to declare the existing body of pages. By including proper ETag headers on your server, you can ensure the crawler only fetches the file when new data exists, saving server capacity.
However, if you manage a site with very limited dynamic content, a TXT file is a valid alternative. It is faster to implement and avoids common issues like invalid XML tags. Many small business websites find that a simple TXT list is enough to inform the crawler about their primary pages without the overhead of XML validation.
Consider your team’s ability to maintain these files. If your CMS generates XML files automatically, you should use that feature. If you have to build a custom solution, evaluate if the extra metadata in XML actually benefits your site. If your content is mostly static, the simplicity of a TXT file might save time without losing significant indexing benefits.
How Alien Road applies this
At Alien Road, we manage the Baidu indexing process by categorizing site content before submission. We audit client websites to ensure that only canonical URLs are included in the sitemap. This prevents the crawler from wasting time on parameter variants or internal search result pages, which are common issues in large e-commerce platforms.
Our process involves verifying that the sitemap file returns a 200 status code and is not blocked by robots.txt. For large clients, we often split the sitemap into smaller segments, ensuring that each file stays within reasonable size limits for faster processing. We then monitor the fetch status through the Baidu Search Resource Platform to ensure the crawler is successfully processing our updates.
We also check that canonical URLs match exactly with what the site uses for internal linking. Mismatches here can lead to indexing errors where the crawler finds different versions of the same page. By keeping our sitemaps clean and aligned with the actual site structure, we ensure that the crawler has a clear path to the most important content.
We often see clients submitting thousands of duplicate URLs in their sitemaps. Cleaning these lists is the most effective way to improve crawl efficiency on Baidu.
Alien Road SEO team
What are the common submission pitfalls?
Common failures occur when the sitemap URL itself is unreachable or triggers a redirect. Baidu requires a direct, accessible file. Including pages that are blocked by robots.txt is another frequent mistake; this creates a conflicting signal that confuses the indexing process and can lead to a lower crawl frequency for your important pages.
Another issue is the inclusion of non-canonical URLs. If your site uses parameters for tracking or filtering, these often create unique URLs that represent the same page. Submitting these in a sitemap forces the crawler to evaluate dozens of identical versions, which wastes your crawl budget and slows down the indexing of new content.
Verify your file size as well. Baidu has specific limits on how many URLs a single file can contain. If your site has tens of thousands of pages, you must break the list into multiple files. Failure to do so often results in partial indexing, where the crawler stops before reaching the end of your list.
- Ensure all URLs in the sitemap use the same protocol (http or https).
- Avoid including URLs that are meant to be excluded from search.
- Keep the file size under the official platform limits to ensure successful fetching.
- Update your modification dates accurately to help the crawler identify new content.
Remember that a sitemap is a declaration, not a guarantee. Use the push API for immediate indexing of urgent content and reserve the sitemap for structural site coverage.
Alien Road SEO team
Where to start this week
Audit your current sitemap to identify non-canonical URLs or broken links. Once cleaned, upload the file to the Baidu Search Resource Platform and monitor the coverage reports in the interface. Focus on ensuring your server supports ETag headers to minimize unnecessary crawler requests.
Check your robots.txt file to ensure the sitemap path is clearly identified. If you have multiple sitemaps, consider using a sitemap index file to manage them all from one location. This simple step keeps your technical setup organized and makes future updates much easier to handle.