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Upload Large Files on IIS7 (Windows Vista/Windows 2008)

“Large Files on IIS7”


I'm trying to upload large file on IIS7 (Windows Vista/Windows 2008) but I'm getting HTTP Error 404.13


You need to change a special option in IIS called maxAllowedContentLength to allow uploading larger files

To resolve this problem, follow these steps:

    1. Click Start. In the Start Search box, type Notepad. Right-click Notepad, and then click Run as administrator.

    Note If you are prompted for an administrator password or for a confirmation, type the password, or click Continue.
    2. On the File menu, click Open. In the File name box, type %windir%\system32\inetsrv\config\applicationhost.config, and then click Open.
    3. In the ApplicationHost.config file, locate the <requestLimits> node.
    4. Remove the maxAllowedContentLength property. Or, add a value that matches the size of the Content-Length header that the client sends as part of the request. By default, the value of the maxAllowedContentLength property is 30000000.

    For example, modify the following configuration data inside the <requestFiltering> section.
    <requestLimits maxAllowedContentLength ="<length>" />

    5. Save the ApplicationHost.config file.  

For more information see:

More info about content filtering in IIS:

See also for more info

For Windows 2003 see this FAQ

George Petrov

George PetrovGeorge Petrov is a renowned software writer and developer whose extensive skills brought numerous extensions, articles and knowledge to the DMXzone- the online community for professional Adobe Dreamweaver users. His expertise in countless languages and technologies gives inspiration and teach valuable lessons on his website –, which is visited daily by more than 30.000 people and is most popular for its over high-quality Dreamweaver extensions and templates.

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