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The 226 IM Used HTTP Status Code: An Overview

Bhargava MNN
~ 7 min read | Published on Mar 28, 2024


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What is a 226 Status Code?

HTTP status codes are a crucial part of the communication between web servers and clients, providing information about the result of a client's request. The 226 IM Used status code, introduced in RFC 3229, is a relatively lesser-known status code that indicates that the server has fulfilled a request for the resource, and the response is a representation of the result of one or more instance manipulations applied to the current instance.

In simpler terms, when you receive a 226 status code, it means that the server has successfully processed the request, and the response carries the result of one or more applied instance manipulations.

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What are the Possible Use Cases for 226 Status Code?

Understanding the potential use cases for the 226 status code is crucial for developers. Here are some scenarios where it might be applicable:

  1. Partial Content Processing: When a server processes only part of the content due to bandwidth limitations or other constraints, it can use the 226 status code to indicate the successful processing of the available portion.
  2. Image Manipulation: In web applications where images undergo transformations or manipulations, such as resizing or filtering, the server can respond with a 226 status code to indicate the successful application of these manipulations.
  3. Document Conversion: For services that convert documents from one format to another, such as PDF to HTML, the 226 status code can signify the successful conversion process.
  4. Data Aggregation: In cases where a server aggregates data from multiple sources before responding to a request, the 226 status code can indicate the successful aggregation process.
  5. Content Transformation: When content undergoes transformation based on client preferences or device capabilities, such as converting video formats or adjusting image quality, the server can use the 226 status code to signal successful transformation.

How to Implement 226 Status Code in JavaScript

Implementing the 226 status code in JavaScript involves handling responses from server requests. Below is a basic example demonstrating how to interpret a response with a 226 status code using JavaScript's Fetch API:

  .then(response => {
    if (response.status === 226) {
      // Process the response
    } else {
      // Handle other status codes
  .catch(error => console.error('Error:', error));

In this example, when the response status is 226, you can proceed with processing the response data as per your application's logic.

Best Practices for Using 226 Status Code

When working with the 226 status code, it's essential to follow best practices to ensure optimal functionality and compatibility:

  1. Provide Clear Documentation: Document the usage of the 226 status code within your API or server documentation to guide developers on its proper implementation and interpretation.
  2. Consistent Response Format: Ensure consistency in the format and structure of responses with the 226 status code to facilitate easier handling by client applications.
  3. Error Handling: Implement robust error handling mechanisms to gracefully manage situations where the server cannot fulfill the request or encounters errors during instance manipulation.
  4. Semantic Use: Use the 226 status code only in scenarios where it accurately represents the server's action of applying instance manipulations to the resource.
  5. Compatibility Testing: Test your application or API with various client implementations to verify proper handling of the 226 status code across different platforms and environments.

How to Test 226 Status Code on Postman

Postman is a popular tool for testing APIs, including HTTP status codes like 226. Follow these steps to test the 226 status code using Postman:

  1. Open Postman: Launch the Postman application on your computer.
  2. Create a Request: Create a new request or open an existing one that you want to test.
  3. Send Request: Send the request to the server by clicking on the "Send" button.
  4. Inspect Response: Examine the response in the "Response" panel. If the server responds with a status code of 226, it indicates successful instance manipulation.

How to Test 226 Status Code in DevTools Browser in Chrome

Testing the 226 status code in the Chrome DevTools browser involves inspecting network requests and responses. Here's how you can do it:

  1. Open DevTools: Right-click on the web page and select "Inspect" to open Chrome DevTools.
  2. Navigate to Network Tab: In DevTools, go to the "Network" tab.
  3. Perform Action: Trigger the action that would result in a response with a 226 status code.
  4. Inspect Response: Look for the corresponding network request in the DevTools panel. The response's status code will be displayed alongside other details.

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Frequently Asked Questions

What does the 226 IM Used status code signify?

The 226 status code indicates that the server has fulfilled a request for the resource, and the response is a representation of the result of one or more instance manipulations applied to the current instance.

When should I use the 226 status code in my application?

You can use the 226 status code when the server successfully processes a request and applies instance manipulations to the resource, such as partial content processing, image manipulation, document conversion, data aggregation, or content transformation.

How do clients handle responses with a 226 status code?

Clients should interpret responses with a 226 status code as successful, indicating that the server has applied instance manipulations to the requested resource.

Can the 226 status code be used for caching purposes?

Yes, the 226 status code can be used to indicate that a response is a representation of a previously manipulated instance, allowing clients to cache the response for future use.

Is the 226 status code widely supported by web servers and clients?

While the 226 status code is standardized, its support may vary among different web servers and clients. It's essential to verify compatibility and conduct thorough testing when implementing it in your application.


In conclusion, the 226 IM Used HTTP status code serves as a valuable tool for indicating successful instance manipulations by the server. By understanding its purpose and proper implementation, developers can enhance the functionality and efficiency of their web applications. For seamless error monitoring and handling, consider using Zipy's tool, which offers session replay capabilities. Learn more about Zipy here.

Read more resources on 2xx status codes

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