Logo of «2Captcha»
Captcha bypass tutorials

How to bypass chinese captcha

How to bypass chinese captcha

CAPTCHAs containing Chinese characters can pose unique challenges for automation. However, with the help of the captcha solver API, you can effectively solve chinese CAPTCHAs and automate interactions with websites that require understanding of Chinese characters. This guide explains how to bypass image-based CAPTCHAs containing Chinese characters step by step.

Bypass CAPTCHAs with Chinese Characters

To recognize CAPTCHAs containing Chinese characters, you need to use the ImageToTextTask method designed for text recognition from images.

Recommendations for Successful Recognition

  • Mandatory: Specify the Chinese language using additional parameters. You can do this as follows: "languagePool": "zh".

  • Report recognition results. It is highly recommended to submit reports for each successful or unsuccessful CAPTCHA recognition. This helps improve processing accuracy and the quality of provided responses.

    Use the method reportCorrect to report successful recognition. Use the method reportIncorrect to report unsuccessful recognition.

  • Submit original images. Try to upload the original CAPTCHA without resizing or quality alterations. Avoid submitting screenshots or edited images.

Workflow Overview:

  1. **Sign up captcha bypass service
  2. Submit CAPTCHA: Send the CAPTCHA image (Base64-encoded) to the solver API.
  3. Wait for Solution: Use the task ID to query the API for get the CAPTCHA answer.
  4. Use Solution: Retrieve the solution and apply it to bypass the CAPTCHA challenge.

Below we will go through a step-by-step algorithm for solving CAPTCHAs containing Chinese characters

Step 1: Set Up Your Account

Register and Fund Your Account:

  1. Create an account on 2Captcha.
  2. Add funds to your account, as solving CAPTCHAs is a paid service.

Get Your API Key:

  1. Log in to your account.
  2. Copy your API key, which will be used for authentication.

Step 2: Submit CAPTCHA

Use the https://api.2captcha.com/createTask endpoint to upload the CAPTCHA image. Make sure the image is encoded in base64 format.

Image Requirement Description
Supported image formats JPEG, PNG, GIF (encoded in Base64 format)
Max file size 100 kB
Max image size 1000px on any side

Request example

API endpoint: https://api.2captcha.com/createTask
Method: POST
Content-Type: application/json

{
    "clientKey": "YOUR_API_KEY",
    "task": {
        "type": "ImageToTextTask",
        "body": "R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==",
        "phrase": false,
        "minLength": 4,
        "maxLength": 5,
        "comment": "enter the text you see on the image"
    },
    "languagePool": "zh"
}

Example Response

{
  "errorId": 0,
  "taskId": "123456789"
}

In the next step, we will use the taskId value to retrieve the CAPTCHA solving result.

Step 3: Wait for Solution

Use the https://api.2captcha.com/getTaskResult endpoint to retrieve the CAPTCHA solution. Pass the taskId from the previous step in the request.

Example Request

API Endpoint: https://api.2captcha.com/getTaskResult
Method: POST
Content-Type: application/json

{
  "clientKey": "YOUR_API_KEY",
  "taskId": "123456789"
}

Example Response (Solution Ready):

{
    "errorId": 0,
    "status": "ready",
    "solution": {
        "text": "汉字"
    },
    "cost": "0.00025",
    "ip": "1.2.3.4",
    "createTime": 1692808229,
    "endTime": 1692808326,
    "solveCount": 1
}

The text field in the solution object contains the CAPTCHA solution text.

Example Response (Still Processing):

{
  "errorId": 0,
  "status": "processing"
}

If the solution is not ready, wait a few seconds and retry the request.

Step 4: Use Solution

Once the CAPTCHA solution is successfully obtained, it must be used to proceed with the next steps in the process. Typically, the CAPTCHA answer is a text string that the user or system needs to input into the appropriate field on the web page or submit via an API.

Guidelines and Best Practices

  1. Handling Errors:

    • Always verify the response for errors (errorId != 0).
    • Implement retry mechanisms for situations where the CAPTCHA solution is not immediately available.

  2. Integrate with Automation:

    • Incorporate the provided examples into your automation workflows to efficiently tackle CAPTCHA challenges.

  3. Optimize Performance:

    • Large images encoded in Base64 can impact processing speed. Ensure you use appropriately sized images and formats supported by the API.

  4. Recommendation: Use Official Libraries:

    • We recommend using our official libraries to interact with the 2captcha API. These libraries are designed to simplify integration and ensure compatibility with our service. You can find them on our official GitHub repository: https://github.com/2captcha.

Conclusion

This tutorial has demonstrated how to effectively solve CAPTCHA contains Chinese symbols using the captcha solving service. By adhering to these best practices, you can seamlessly and responsibly integrate CAPTCHA-solving functionality into your projects.

References