---
description: Migrate from Google reCAPTCHA to Cloudflare Turnstile.
title: Migrate from reCAPTCHA
image: https://developers.cloudflare.com/og-docs.png
---
[Skip to content](#main-content)
> Documentation Index
> Fetch the complete documentation index at: https://developers.cloudflare.com/turnstile/llms.txt
> Use this file to discover all available pages before exploring further.
# Migrate from reCAPTCHA
Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/turnstile/migration/recaptcha/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)
If you are using reCAPTCHA today, you can switch seamlessly to Cloudflare Turnstile by following the step-by-step guide below to assist with the upgrade process.
To complete the migration, you must obtain the [sitekey and secret key](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/turnstile/get-started/widget-management/).
Note
Turnstile migration is currently compatible up to reCAPTCHA v2.
## Client-side integration
1. Update the client-side integration by inserting the Turnstile script snippet in your HTML's `` element.
```html
```
Note
Adding `?compat=recaptcha` runs Turnstile in compatibility mode, which enables the following features:
* implicit rendering for reCAPTCHA
* `g-recaptcha-response` input name for forms
* register the Turnstile API as `grecaptcha`
2. Locate the `grecaptcha.render()` calls and replace the sitekey with your Turnstile sitekey.
Note
Turnstile supports:
* the `render()` call
* reCAPTCHA v2 invisible mode with the `execute()` call
## Server-side integration
Update the server-side integration by replacing the Siteverify URL.
Replace `https://www.google.com/recaptcha/api/siteverify` with the following:
```txt
https://challenges.cloudflare.com/turnstile/v0/siteverify
```
Differences to reCAPTCHA's Siteverify
reCAPTCHA supports `GET` requests using query parameters, such as `GET /siteverify?response=&secret=`.
Turnstile's Siteverify endpoint does _not_ support this and only accepts `POST` requests with a FormData or JSON body.
Refer to [server-side validation](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/turnstile/get-started/server-side-validation/) for more information.
Was this helpful?
YesNo
## On this page
[Docs](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/)
```json
{"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/turnstile/migration/recaptcha/#page","headline":"Migrate from reCAPTCHA ยท Cloudflare Turnstile docs","description":"Migrate from Google reCAPTCHA to Cloudflare Turnstile.","url":"https://developers.cloudflare.com/turnstile/migration/recaptcha/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","dateModified":"2026-08-24","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"},"keywords":["Migration"]}
```