diff --git a/Directory.Build.props b/Directory.Build.props
index cd02350..b46188a 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,8 +1,8 @@
 <Project>
 
   <PropertyGroup>
-    <VersionPrefix>3.8.0</VersionPrefix>
-    <PackageValidationBaselineVersion>3.7.0</PackageValidationBaselineVersion>
+    <VersionPrefix>3.9.0</VersionPrefix>
+    <PackageValidationBaselineVersion>3.8.0</PackageValidationBaselineVersion>
     <LangVersion>12.0</LangVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
diff --git a/ReleaseNotes.md b/ReleaseNotes.md
index efcf1de..3eacdae 100644
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.md
@@ -2,6 +2,10 @@
 
 These are the NuGet package releases. See also [npm Release Notes](ReleaseNotesNpm.md).
 
+## 3.9.0
+
+* Add ability to configure route specific `bodyLimit` in fastify plugin, via the new `routeOptions` property on the plugin constructor.
+
 ## 3.8.0
 
 * Set explicit Content-Type headers in fastify plugin routes.
diff --git a/conformance/src/fastify/app.ts b/conformance/src/fastify/app.ts
index 8e64ada..e39a428 100644
--- a/conformance/src/fastify/app.ts
+++ b/conformance/src/fastify/app.ts
@@ -10,6 +10,14 @@ const app: FastifyPluginAsync<FastifyServerOptions> = async (fastify): Promise<v
 			new ConformanceApiService(conformanceTestsJson.tests),
 		caseInsensitiveQueryStringKeys: true,
 		includeErrorDetails: true,
+		routeOptions: {
+			'*': {
+				bodyLimit: 10 * 1024, // 10 KB
+			},
+			'createWidget': {
+				bodyLimit: 100 * 1024, // 100 KB
+			}
+		}
 	};
 
 	fastify.register(conformanceApiPlugin, conformanceApiPluginOptions);
diff --git a/conformance/src/fastify/conformanceApiPlugin.ts b/conformance/src/fastify/conformanceApiPlugin.ts
index 292f371..0ba3088 100644
--- a/conformance/src/fastify/conformanceApiPlugin.ts
+++ b/conformance/src/fastify/conformanceApiPlugin.ts
@@ -13,11 +13,16 @@ export type ConformanceApiPluginOptions = fastifyTypes.RegisterOptions & {
 
   /** Whether to include error details in the response. Defaults to false. */
   includeErrorDetails?: boolean;
+
+  /** Additional supported route options to use with routes. Only `bodyLimit` is currently supported. Use '*' to apply to all routes. */
+  routeOptions?: { [K in '*' | ConformanceApiRoutes]?: Pick<fastifyTypes.RouteOptions, 'bodyLimit'> };
 }
 
+export type ConformanceApiRoutes = 'getApiInfo' | 'getWidgets' | 'createWidget' | 'getWidget' | 'deleteWidget' | 'getWidgetBatch' | 'mirrorFields' | 'checkQuery' | 'checkPath' | 'mirrorHeaders' | 'mixed' | 'required' | 'mirrorBytes' | 'mirrorText' | 'bodyTypes';
+
 /** EXPERIMENTAL: The generated code for this plugin is subject to change/removal without a major version bump. */
 export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceApiPluginOptions> = async (fastify, opts) => {
-  const { serviceOrFactory, caseInsensitiveQueryStringKeys, includeErrorDetails } = opts;
+  const { serviceOrFactory, caseInsensitiveQueryStringKeys, includeErrorDetails, routeOptions } = opts;
 
   const getService = typeof serviceOrFactory === 'function' ? serviceOrFactory : () => serviceOrFactory;
 
@@ -73,9 +78,12 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
     });
   }
 
+  const defaultBodyLimit = routeOptions?.['*']?.bodyLimit;
+
   fastify.route({
     url: '/',
     method: 'GET',
+    bodyLimit: routeOptions?.['getApiInfo']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -101,12 +109,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets',
     method: 'GET',
+    bodyLimit: routeOptions?.['getWidgets']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -134,12 +143,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets',
     method: 'POST',
+    bodyLimit: routeOptions?.['createWidget']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '201': { $ref: 'Widget' },
@@ -168,12 +178,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets/:id',
     method: 'GET',
+    bodyLimit: routeOptions?.['getWidget']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { $ref: 'Widget' },
@@ -208,12 +219,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets/:id',
     method: 'DELETE',
+    bodyLimit: routeOptions?.['deleteWidget']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '204': { type: 'object', additionalProperties: false },
@@ -247,12 +259,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets/get',
     method: 'POST',
+    bodyLimit: routeOptions?.['getWidgetBatch']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'array', items: { type: 'object', properties: { value: { $ref: 'Widget' }, error: { $ref: '_error' } } } },
@@ -278,12 +291,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mirrorFields',
     method: 'POST',
+    bodyLimit: routeOptions?.['mirrorFields']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -313,12 +327,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/checkQuery',
     method: 'GET',
+    bodyLimit: routeOptions?.['checkQuery']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'object', additionalProperties: false },
@@ -349,12 +364,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/checkPath/:string/:boolean/:float/:double/:int32/:int64/:decimal/:enum/:datetime',
     method: 'GET',
+    bodyLimit: routeOptions?.['checkPath']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'object', additionalProperties: false },
@@ -385,12 +401,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mirrorHeaders',
     method: 'GET',
+    bodyLimit: routeOptions?.['mirrorHeaders']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'object', additionalProperties: false },
@@ -431,12 +448,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mixed/:path',
     method: 'POST',
+    bodyLimit: routeOptions?.['mixed']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -483,12 +501,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/required',
     method: 'POST',
+    bodyLimit: routeOptions?.['required']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -527,12 +546,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mirrorBytes',
     method: 'POST',
+    bodyLimit: routeOptions?.['mirrorBytes']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'string' },
@@ -563,12 +583,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mirrorText',
     method: 'POST',
+    bodyLimit: routeOptions?.['mirrorText']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'string' },
@@ -599,12 +620,13 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/bodyTypes',
     method: 'POST',
+    bodyLimit: routeOptions?.['bodyTypes']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'string' },
@@ -630,7 +652,7 @@ export const conformanceApiPlugin: fastifyTypes.FastifyPluginAsync<ConformanceAp
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 }
 
diff --git a/conformance/src/fastify/jsConformanceApiPlugin.js b/conformance/src/fastify/jsConformanceApiPlugin.js
index 25224fb..65717df 100644
--- a/conformance/src/fastify/jsConformanceApiPlugin.js
+++ b/conformance/src/fastify/jsConformanceApiPlugin.js
@@ -4,7 +4,7 @@
 
 /** EXPERIMENTAL: The generated code for this plugin is subject to change/removal without a major version bump. */
 export const jsConformanceApiPlugin = async (fastify, opts) => {
-  const { serviceOrFactory, caseInsensitiveQueryStringKeys, includeErrorDetails } = opts;
+  const { serviceOrFactory, caseInsensitiveQueryStringKeys, includeErrorDetails, routeOptions } = opts;
 
   const getService = typeof serviceOrFactory === 'function' ? serviceOrFactory : () => serviceOrFactory;
 
@@ -60,9 +60,12 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
     });
   }
 
+  const defaultBodyLimit = routeOptions?.['*']?.bodyLimit;
+
   fastify.route({
     url: '/',
     method: 'GET',
+    bodyLimit: routeOptions?.['getApiInfo']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -88,12 +91,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets',
     method: 'GET',
+    bodyLimit: routeOptions?.['getWidgets']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -121,12 +125,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets',
     method: 'POST',
+    bodyLimit: routeOptions?.['createWidget']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '201': { $ref: 'Widget' },
@@ -155,12 +160,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets/:id',
     method: 'GET',
+    bodyLimit: routeOptions?.['getWidget']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { $ref: 'Widget' },
@@ -195,12 +201,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets/:id',
     method: 'DELETE',
+    bodyLimit: routeOptions?.['deleteWidget']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '204': { type: 'object', additionalProperties: false },
@@ -234,12 +241,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/widgets/get',
     method: 'POST',
+    bodyLimit: routeOptions?.['getWidgetBatch']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'array', items: { type: 'object', properties: { value: { $ref: 'Widget' }, error: { $ref: '_error' } } } },
@@ -265,12 +273,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mirrorFields',
     method: 'POST',
+    bodyLimit: routeOptions?.['mirrorFields']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -300,12 +309,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/checkQuery',
     method: 'GET',
+    bodyLimit: routeOptions?.['checkQuery']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'object', additionalProperties: false },
@@ -336,12 +346,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/checkPath/:string/:boolean/:float/:double/:int32/:int64/:decimal/:enum/:datetime',
     method: 'GET',
+    bodyLimit: routeOptions?.['checkPath']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'object', additionalProperties: false },
@@ -372,12 +383,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mirrorHeaders',
     method: 'GET',
+    bodyLimit: routeOptions?.['mirrorHeaders']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'object', additionalProperties: false },
@@ -418,12 +430,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mixed/:path',
     method: 'POST',
+    bodyLimit: routeOptions?.['mixed']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -470,12 +483,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/required',
     method: 'POST',
+    bodyLimit: routeOptions?.['required']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': {
@@ -514,12 +528,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mirrorBytes',
     method: 'POST',
+    bodyLimit: routeOptions?.['mirrorBytes']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'string' },
@@ -550,12 +565,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/mirrorText',
     method: 'POST',
+    bodyLimit: routeOptions?.['mirrorText']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'string' },
@@ -586,12 +602,13 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 
   fastify.route({
     url: '/bodyTypes',
     method: 'POST',
+    bodyLimit: routeOptions?.['bodyTypes']?.bodyLimit ?? defaultBodyLimit,
     schema: {
       response: {
         '200': { type: 'string' },
@@ -617,7 +634,7 @@ export const jsConformanceApiPlugin = async (fastify, opts) => {
       } else {
         throw new Error('Result must have exactly one set from: value, error');
       }
-    }
+    },
   });
 }
 
diff --git a/src/Facility.CodeGen.JavaScript/JavaScriptGenerator.cs b/src/Facility.CodeGen.JavaScript/JavaScriptGenerator.cs
index 735cb28..2b9c32d 100644
--- a/src/Facility.CodeGen.JavaScript/JavaScriptGenerator.cs
+++ b/src/Facility.CodeGen.JavaScript/JavaScriptGenerator.cs
@@ -692,7 +692,14 @@ private CodeGenOutput GenerateFastifyPluginOutput(ServiceInfo service)
 						code.WriteLine();
 						WriteJsDoc(code, "Whether to include error details in the response. Defaults to false.");
 						code.WriteLine("includeErrorDetails?: boolean;");
+
+						code.WriteLine();
+						WriteJsDoc(code, "Additional supported route options to use with routes. Only `bodyLimit` is currently supported. Use '*' to apply to all routes.");
+						code.WriteLine($"routeOptions?: {{ [K in '*' | {capModuleName}Routes]?: Pick<fastifyTypes.RouteOptions, 'bodyLimit'> }};");
 					}
+
+					code.WriteLine();
+					code.WriteLine($"export type {capModuleName}Routes = {string.Join(" | ", httpServiceInfo.Methods.Select(m => $"'{m.ServiceMethod.Name}'"))};");
 				}
 				else
 				{
@@ -703,7 +710,7 @@ private CodeGenOutput GenerateFastifyPluginOutput(ServiceInfo service)
 				WriteJsDoc(code, "EXPERIMENTAL: The generated code for this plugin is subject to change/removal without a major version bump.");
 				using (code.Block($"export const {camelCaseModuleName}Plugin" + IfTypeScript($": fastifyTypes.FastifyPluginAsync<{capModuleName}PluginOptions>") + " = async (fastify, opts) => {", "}"))
 				{
-					code.WriteLine("const { serviceOrFactory, caseInsensitiveQueryStringKeys, includeErrorDetails } = opts;");
+					code.WriteLine("const { serviceOrFactory, caseInsensitiveQueryStringKeys, includeErrorDetails, routeOptions } = opts;");
 
 					code.WriteLine();
 					code.WriteLine("const getService = typeof serviceOrFactory === 'function' ? serviceOrFactory : () => serviceOrFactory;");
@@ -781,6 +788,9 @@ private CodeGenOutput GenerateFastifyPluginOutput(ServiceInfo service)
 						}
 					}
 
+					code.WriteLine();
+					code.WriteLine("const defaultBodyLimit = routeOptions?.['*']?.bodyLimit;");
+
 					foreach (var httpMethodInfo in httpServiceInfo.Methods)
 					{
 						var methodName = httpMethodInfo.ServiceMethod.Name;
@@ -794,6 +804,7 @@ private CodeGenOutput GenerateFastifyPluginOutput(ServiceInfo service)
 						{
 							code.WriteLine($"url: '{fastifyPath}',");
 							code.WriteLine($"method: '{httpMethodInfo.Method.ToUpperInvariant()}',");
+							code.WriteLine($"bodyLimit: routeOptions?.['{httpMethodInfo.ServiceMethod.Name}']?.bodyLimit ?? defaultBodyLimit,");
 							using (code.Block("schema: {", "},"))
 							{
 								using (code.Block("response: {", "},"))
@@ -829,7 +840,7 @@ private CodeGenOutput GenerateFastifyPluginOutput(ServiceInfo service)
 									code.WriteLine("'5xx': { $ref: '_error' },");
 								}
 							}
-							using (code.Block("handler: async function (req, res) {", "}"))
+							using (code.Block("handler: async function (req, res) {", "},"))
 							{
 								code.WriteLine("const request" + IfTypeScript($": Partial<I{capMethodName}Request>") + " = {};");
 								if (httpMethodInfo.PathFields.Count != 0)