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Cloudflare Turnstile

Cloudflare's smart CAPTCHA alternative.

Turnstile can be embedded into any website without sending traffic through Cloudflare and works without showing visitors a CAPTCHA.

Turnstile Overview

Cloudflare issues challenges through the Challenge Platform, which is the same underlying technology powering Turnstile.

In contrast to our Challenge page offerings, Turnstile allows you to run challenges anywhere on your site in a less-intrusive way without requiring the use of Cloudflare's CDN.

How Turnstile works

Turnstile adapts the challenge outcome to the individual visitor or browser. First, we run a series of small non-interactive JavaScript challenges to gather signals about the visitor or browser environment.

These challenges include proof-of-work, proof-of-space, probing for web APIs, and various other challenges for detecting browser-quirks and human behavior. As a result, we can fine-tune the difficulty of the challenge to the specific request and avoid showing a visual or interactive puzzle to a user.

Widget types

Turnstile widget types include:

  • Non-interactive: Visitors never need to interact with the widget.
  • Managed: Visitors are presented with an interactive checkbox if they are a suspected bot.
  • Invisible: The widget is completely hidden from the visitor.

Accessibility

Turnstile is WCAG 2.1 AA compliant.

Features

Turnstile Analytics

Assess the number of challenges issued, evaluate the challenge solve rate, and view the metrics of issued challenges.

Use Turnstile Analytics

Pre-clearance

Integrate Cloudflare challenges on single-page applications (SPAs) by allowing Turnstile to issue a Pre-Clearance cookie.

Use Pre-clearance
Bots

Cloudflare bot solutions identify and mitigate automated traffic to protect your domain from bad bots.

DDoS Protection

Detect and mitigate Distributed Denial of Service (DDoS) attacks using Cloudflare's Autonomous Edge.

WAF

Get automatic protection from vulnerabilities and the flexibility to create custom rules.

More resources

Plans

Learn more about Turnstile's plan availability.