OWIN Tools
OWIN Tools
Generate a new OWIN Startup.cs by picking middleware (CORS, static files, cookie/OAuth authentication, Web API, SignalR, session, error page); or paste an existing OWIN Configuration(IAppBuilder app) method and migrate it to a .NET 6+ minimal-hosting Program.cs with a per-line breakdown of what changed. Includes a standalone OWIN → ASP.NET Core middleware reference table.
Check the middleware you need — the code regenerates live. Order follows common OWIN convention (CORS/static files first, auth next, then Web API/SignalR); see inline comments for anything left ambiguous.
OWIN Tools
Generate a new OWIN Startup.cs by picking middleware (CORS, static files, cookie/OAuth authentication, Web API, SignalR, session, error page); or paste an existing OWIN Configuration(IAppBuilder app) method and migrate it to a .NET 6+ minimal-hosting Program.cs with a per-line breakdown of what changed. Includes a standalone OWIN → ASP.NET Core middleware reference table.
Common uses
- Generate an OWIN Startup.cs with CORS and cookie authentication
- Migrate an OWIN Configuration method to ASP.NET Core Program.cs
- Look up the ASP.NET Core equivalent of app.UseWebApi(...)
Also searched as
- owin startup.cs generator
- migrate owin startup to asp.net core
- convert owin configuration method to program.cs
- owin middleware to asp.net core equivalent
- app.usewebapi asp.net core equivalent
- owin cors cookie authentication startup example
- owin to minimal hosting migration
- odata query builder online
- iappbuilder to webapplication builder
Frequently asked questions
How do I migrate an OWIN Startup to ASP.NET Core?
Paste your Configuration(IAppBuilder app) method into the Migrate tab. The tool produces a .NET 6+ minimal-hosting Program.cs with a per-line breakdown of what changed; some items, such as authentication settings, still need manual porting.
What is the ASP.NET Core equivalent of an OWIN middleware?
The Middleware Reference tab is a lookup table mapping OWIN calls to their ASP.NET Core counterparts.
Can I generate a new OWIN Startup.cs?
Yes, the Startup Generator lets you pick middleware such as CORS, static files, cookie or OAuth bearer authentication, Web API, SignalR, session and error page.
Can I build an OData query string?
Yes, the OData Query Builder tab builds $filter, $orderby, $top, $skip, $select, $expand and $count options into a query string and can run it against sample JSON.
Is my data uploaded to a server?
No. This tool runs entirely in your browser — your input is processed locally on your device and is never uploaded or stored on a server.