Skip to main content

Normal Captcha

A Normal Captcha is an image containing distorted—but human-readable—text. CaptchaAI analyzes the image and returns the text solution, allowing you to automate basic text-based captcha challenges.

Overview​

Normal Captcha is one of the most basic yet common CAPTCHA types:

  • Distorted text images with letters and/or numbers
  • Case-sensitive or case-insensitive text
  • Single or multiple words in the image
  • Numeric-only or alphanumeric combinations
  • Commonly seen in Solve Media, legacy reCAPTCHA v1, Facebook, and custom implementations
Normal Captcha Example

Example: Normal captcha with distorted text

How to Solve Normal Captcha​

Step 1: Prepare Your Image​

Ensure your captcha image meets these requirements:

  • Size: Between 100 bytes and 100 KB
  • Format: JPG, JPEG, PNG, or GIF
  • Content: Clearly visible (though distorted) text or numbers

Step 2: Submit the Task to CaptchaAI​

Send a POST request to https://ocr.captchaai.com/in.php with the captcha image.

import requests

# Using file upload
with open('captcha.jpg', 'rb') as f:
    files = {'file': f}
    data = {
        'key': 'YOUR_API_KEY',
        'method': 'post',
        'json': '1'
    }
    
    response = requests.post('https://ocr.captchaai.com/in.php', files=files, data=data)
    result = response.json()
    task_id = result['request']

Step 3: Retrieve the Solution​

Wait 5 seconds, then poll for the result using a GET request to https://ocr.captchaai.com/res.php:

import time

time.sleep(5)  # Wait 5 seconds

params = {
    'key': 'YOUR_API_KEY',
    'action': 'get',
    'id': task_id,
    'json': '1'
}

response = requests.get('https://ocr.captchaai.com/res.php', params=params)
result = response.json()

if result['status'] == 1:
    solution = result['request']  # e.g., "ABC123"
    print(f"Captcha text: {solution}")

Step 4: Apply the Solution​

The response contains the detected text from the captcha image:

  • Enter the text into the target form field
  • Submit the form to complete the verification

Response Format​

JSON Response (with json=1):

{
  "status": 1,
  "request": "ABC123"
}

Plain Text Response:

OK|ABC123

Common Errors​

  • ERROR_WRONG_FILE_EXTENSION: Unsupported image format. Use JPG, JPEG, PNG, or GIF.
  • ERROR_ZERO_CAPTCHA_FILESIZE: Image size less than 100 bytes. Check and resize your image.
  • ERROR_TOO_BIG_CAPTCHA_FILESIZE: Image size more than 100 KB. Compress your image.
  • ERROR_ZERO_BALANCE: Insufficient account balance. Top up your account to continue.
  • CAPCHA_NOT_READY: Solution not ready yet. Wait 5 seconds and poll again.

For complete error documentation, see the Error Handling Guide.

Tips & Best Practices​

Tip: Use json=1 parameter for structured responses that are easier to parse

Tip: For case-sensitive captchas, add regsense=1 parameter to improve accuracy

Tip: If captcha contains only numbers, add numeric=1 for better results

Tip: Use high-quality images without compression artifacts for best accuracy

API Reference​

For complete API specifications and advanced options, visit the CaptchaAI API Documentation and select Normal Captcha from the sidebar.