robots.txt & llms.txt across the Tranco top 1M
Data as of 2026-07-25 · robots.txt via Common Crawl CC-MAIN-2026-25 + our polite crawl · llms.txt via our polite crawl · Tranco top-1,000,000 · crawls: 2026-07-25 · 2026-07-17 687,794 robots.txt fetches · 491,025 parsed · 54,000 llms.txt probes

Segments

Headline metrics broken down by segment. Toggle the segmentation axis and the weighting. Rank-weighting (FR-23b) weights each domain by 1/Tranco-rank, so a restriction on a top site counts far more than one deep in the tail.

One crawl ingested (2026-07-25). Cross-crawl trend lines appear automatically when the next monthly crawl lands.

Segment: Rank tier Rank decile TLD Overall
Weighting: Raw Rank-weighted
robots.txt returns 200
data table
top_1k82.6%
top_10k77.3%
top_100k74.9%
top_1m71.9%
absent (404)
data table
top_1k5.6%
top_10k4.8%
top_100k6.8%
top_1m8.4%
disallow-all
data table
top_1k21.9%
top_10k3.3%
top_100k2.3%
top_1m2.4%
allow-all
data table
top_1k16.2%
top_10k14.0%
top_100k19.6%
top_1m25.3%
wildcard * UA
data table
top_1k98.2%
top_10k96.4%
top_100k95.5%
top_1m94.4%
declares a sitemap
data table
top_1k75.5%
top_10k66.3%
top_100k66.6%
top_1m63.5%
llms.txt adoption
data table
top_1k16.1%
top_10k11.8%
top_100k11.3%
top_1m11.5%

Full data table

Rank tier sample status 200status 404disallow allallow allwildcard uasitemapllms adoption
top_1k 582 82.6% 5.6% 21.9% 16.2% 98.2% 75.5% 16.1%
top_10k 5,816 77.3% 4.8% 3.3% 14.0% 96.4% 66.3% 11.8%
top_100k 52,157 74.9% 6.8% 2.3% 19.6% 95.5% 66.6% 11.3%
top_1m 432,470 71.9% 8.4% 2.4% 25.3% 94.4% 63.5% 11.5%

llms.txt not probed cells: this crawl's cohort covers the top 500k (rank deciles 1–5); the rest join in a later crawl.