> ## Documentation Index
> Fetch the complete documentation index at: https://docs.httpmon.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Diff view

> Compare two flows side-by-side

Diff view lets you compare two captured flows side-by-side. You can spot differences in methods, URLs, status codes, headers, and bodies at a glance.

## Mark flows for comparison

1. Navigate to the first flow in the flow list and press `d` to mark it.
2. Navigate to the second flow and press `d` again.

httpmon opens the diff view automatically after you mark the second flow.

## What gets compared

The diff view shows a side-by-side comparison of:

* **Method and URL** -- See if the endpoints or HTTP methods differ
* **Status code** -- Compare response status codes
* **Headers** -- Spot added, removed, or changed headers
* **Bodies** -- Line-by-line diff of request and response bodies

For small bodies, httpmon shows a standard line-by-line diff with additions and removals highlighted. For large bodies (over 200 lines), httpmon switches to a sequential diff that keeps the view readable.

<Frame>
  <img src="https://mintcdn.com/pragmaticoslu/GKMvH6x25ZdEJHbo/images/screenshots/diff.png?fit=max&auto=format&n=GKMvH6x25ZdEJHbo&q=85&s=894720b145e2768de3ffa8e98f4571f5" alt="httpmon diff view" width="5877" height="1904" data-path="images/screenshots/diff.png" />
</Frame>

## When to use diff

* Compare a request before and after a code change
* Verify that a scripting hook modified the right headers
* Check why two similar requests produce different responses