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Please enable JavaScript to use this service. If you are using Tor Browser, you can view CAPTCHA Monitor in 'Safer' mode.

CAPTCHA Monitor only uses JavaScript resources that are hosted by the CAPTCHA Monitor server.

The CAPTCHA Monitoring project aims to track how often Cloudflare fronted websites return CAPTCHAs to Tor clients. The project aims to achieve this by fetching webpages via both Tor and other mainstream web browsers and comparing the results. The tests are repeated periodically to find the patterns over time.

Collected metadata, metrics, and results are analyzed and displayed here to understand how Cloudflare manipulates internet traffic and affects people's access to the internet. Please visit the project website for more detailed information.

You can use the measurement search at /measurements to see individual measurements and more data. If you prefer to access the raw data, you can use the API at api.captcha.wtf

Percentage of exit nodes received CAPTCHA by
Tor Browser security level
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Percentage of exit nodes received CAPTCHA by
Tor Browser version
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Percentage of exit nodes received CAPTCHA by
web browser type
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Percentage of exit nodes received CAPTCHA by
IP version
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Percentage of exit nodes received CAPTCHA by
HTTP requests quantity
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Percentage of exit nodes received CAPTCHA by
connection security
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Distribution of exit nodes that received CAPTCHA by
country
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Distribution of exit nodes that received CAPTCHA by
continent
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