Image Resizer - the IIS/ASP.NET module for everyone

Resize, watermark, crop, rotate and filter from the image URL.
Usable from javascript, css, html, php, ruby, python, asp, asp.net, anything!

This plugin (Diagnostics plugin) is part of the Free bundle

Where is the plugins section?

The <plugins> section is located in Web.config, and is nested inside the <resizer> element, which is nested inside <configuration>. For examples, see this sample Web.config file.

What is NuGet?

NuGet is a better way to manage your project's libraries, and is fully supported by the ImageResizer.

Cloud Bundle

Performance Bundle

Extras Bundle

Free bundle

Design bundle

Don't see the feature or plugin you're looking for? I do custom plugin development at 80% off my regular rates.

Diagnostics plugin

The /resizer.debug page is provided by this plugin (which is installed by default)

If you're not using IIS Integrated mode, you will need to access it via /resizer.debug.ashx

Diagnostics page not working?

By default, the Diagnostics plugin uses the same setting as customErrors (which defaults to Localhost). Thus, if you can see ASP.NET error messages, you will also be able to get the diagnostics page. This ensures that the diagnostics page never exposes data to a host that doesn't already have access to detailed error messages.

To override, add one of the following to the <resizer> section.

<diagnostics enableFor="AllHosts" />
<diagnostics enableFor="Localhost" />
<diagnostics enableFor="None" />

I think they are pretty obvious.

ASP.NET MVC notes

If you can't access the diagnostics page, your routes may be interfering.

Either (a) install the MvcRoutingShim plugin, or (b) make the following code change.

In Global.asax.cs, in RegisterRoutes, add the line of code displayed below.

public static void RegisterRoutes(RouteCollection routes) {
    routes.IgnoreRoute("resizer.debug");
    routes.IgnoreRoute("resizer.debug.ashx");
}