diff --git a/client/src/components/DynamicJsonForm.tsx b/client/src/components/DynamicJsonForm.tsx
index f5b0d63..bd77639 100644
--- a/client/src/components/DynamicJsonForm.tsx
+++ b/client/src/components/DynamicJsonForm.tsx
@@ -3,33 +3,9 @@ import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import JsonEditor from "./JsonEditor";
-import { updateValueAtPath, JsonObject } from "@/utils/jsonPathUtils";
+import { updateValueAtPath } from "@/utils/jsonUtils";
 import { generateDefaultValue, formatFieldLabel } from "@/utils/schemaUtils";
-
-export type JsonValue =
-  | string
-  | number
-  | boolean
-  | null
-  | undefined
-  | JsonValue[]
-  | { [key: string]: JsonValue };
-
-export type JsonSchemaType = {
-  type:
-    | "string"
-    | "number"
-    | "integer"
-    | "boolean"
-    | "array"
-    | "object"
-    | "null";
-  description?: string;
-  required?: boolean;
-  default?: JsonValue;
-  properties?: Record<string, JsonSchemaType>;
-  items?: JsonSchemaType;
-};
+import type { JsonValue, JsonSchemaType, JsonObject } from "@/utils/jsonUtils";
 
 interface DynamicJsonFormProps {
   schema: JsonSchemaType;
diff --git a/client/src/components/JsonView.tsx b/client/src/components/JsonView.tsx
index 46a267d..3fcbf8e 100644
--- a/client/src/components/JsonView.tsx
+++ b/client/src/components/JsonView.tsx
@@ -1,9 +1,10 @@
 import { useState, memo, useMemo, useCallback, useEffect } from "react";
-import { JsonValue } from "./DynamicJsonForm";
+import type { JsonValue } from "@/utils/jsonUtils";
 import clsx from "clsx";
 import { Copy, CheckCheck } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { useToast } from "@/hooks/use-toast";
+import { getDataType, tryParseJson } from "@/utils/jsonUtils";
 
 interface JsonViewProps {
   data: unknown;
@@ -14,21 +15,6 @@ interface JsonViewProps {
   isError?: boolean;
 }
 
-function tryParseJson(str: string): { success: boolean; data: JsonValue } {
-  const trimmed = str.trim();
-  if (
-    !(trimmed.startsWith("{") && trimmed.endsWith("}")) &&
-    !(trimmed.startsWith("[") && trimmed.endsWith("]"))
-  ) {
-    return { success: false, data: str };
-  }
-  try {
-    return { success: true, data: JSON.parse(str) };
-  } catch {
-    return { success: false, data: str };
-  }
-}
-
 const JsonView = memo(
   ({
     data,
@@ -129,16 +115,7 @@ const JsonNode = memo(
     isError = false,
   }: JsonNodeProps) => {
     const [isExpanded, setIsExpanded] = useState(depth < initialExpandDepth);
-
-    const getDataType = (value: JsonValue): string => {
-      if (Array.isArray(value)) return "array";
-      if (value === null) return "null";
-      return typeof value;
-    };
-
-    const dataType = getDataType(data);
-
-    const typeStyleMap: Record<string, string> = {
+    const [typeStyleMap] = useState<Record<string, string>>({
       number: "text-blue-600",
       boolean: "text-amber-600",
       null: "text-purple-600",
@@ -146,7 +123,8 @@ const JsonNode = memo(
       string: "text-green-600 group-hover:text-green-500",
       error: "text-red-600 group-hover:text-red-500",
       default: "text-gray-700",
-    };
+    });
+    const dataType = getDataType(data);
 
     const renderCollapsible = (isArray: boolean) => {
       const items = isArray
diff --git a/client/src/components/Sidebar.tsx b/client/src/components/Sidebar.tsx
index 4633d64..e3e2118 100644
--- a/client/src/components/Sidebar.tsx
+++ b/client/src/components/Sidebar.tsx
@@ -103,14 +103,19 @@ const Sidebar = ({
       <div className="p-4 flex-1 overflow-auto">
         <div className="space-y-4">
           <div className="space-y-2">
-            <label className="text-sm font-medium">Transport Type</label>
+            <label
+              className="text-sm font-medium"
+              htmlFor="transport-type-select"
+            >
+              Transport Type
+            </label>
             <Select
               value={transportType}
               onValueChange={(value: "stdio" | "sse") =>
                 setTransportType(value)
               }
             >
-              <SelectTrigger>
+              <SelectTrigger id="transport-type-select">
                 <SelectValue placeholder="Select transport type" />
               </SelectTrigger>
               <SelectContent>
@@ -123,8 +128,11 @@ const Sidebar = ({
           {transportType === "stdio" ? (
             <>
               <div className="space-y-2">
-                <label className="text-sm font-medium">Command</label>
+                <label className="text-sm font-medium" htmlFor="command-input">
+                  Command
+                </label>
                 <Input
+                  id="command-input"
                   placeholder="Command"
                   value={command}
                   onChange={(e) => setCommand(e.target.value)}
@@ -132,8 +140,14 @@ const Sidebar = ({
                 />
               </div>
               <div className="space-y-2">
-                <label className="text-sm font-medium">Arguments</label>
+                <label
+                  className="text-sm font-medium"
+                  htmlFor="arguments-input"
+                >
+                  Arguments
+                </label>
                 <Input
+                  id="arguments-input"
                   placeholder="Arguments (space-separated)"
                   value={args}
                   onChange={(e) => setArgs(e.target.value)}
@@ -144,8 +158,11 @@ const Sidebar = ({
           ) : (
             <>
               <div className="space-y-2">
-                <label className="text-sm font-medium">URL</label>
+                <label className="text-sm font-medium" htmlFor="sse-url-input">
+                  URL
+                </label>
                 <Input
+                  id="sse-url-input"
                   placeholder="URL"
                   value={sseUrl}
                   onChange={(e) => setSseUrl(e.target.value)}
@@ -157,6 +174,7 @@ const Sidebar = ({
                   variant="outline"
                   onClick={() => setShowBearerToken(!showBearerToken)}
                   className="flex items-center w-full"
+                  aria-expanded={showBearerToken}
                 >
                   {showBearerToken ? (
                     <ChevronDown className="w-4 h-4 mr-2" />
@@ -167,8 +185,14 @@ const Sidebar = ({
                 </Button>
                 {showBearerToken && (
                   <div className="space-y-2">
-                    <label className="text-sm font-medium">Bearer Token</label>
+                    <label
+                      className="text-sm font-medium"
+                      htmlFor="bearer-token-input"
+                    >
+                      Bearer Token
+                    </label>
                     <Input
+                      id="bearer-token-input"
                       placeholder="Bearer Token"
                       value={bearerToken}
                       onChange={(e) => setBearerToken(e.target.value)}
@@ -187,6 +211,7 @@ const Sidebar = ({
                 onClick={() => setShowEnvVars(!showEnvVars)}
                 className="flex items-center w-full"
                 data-testid="env-vars-button"
+                aria-expanded={showEnvVars}
               >
                 {showEnvVars ? (
                   <ChevronDown className="w-4 h-4 mr-2" />
@@ -201,6 +226,7 @@ const Sidebar = ({
                     <div key={idx} className="space-y-2 pb-4">
                       <div className="flex gap-2">
                         <Input
+                          aria-label={`Environment variable key ${idx + 1}`}
                           placeholder="Key"
                           value={key}
                           onChange={(e) => {
@@ -243,6 +269,7 @@ const Sidebar = ({
                       </div>
                       <div className="flex gap-2">
                         <Input
+                          aria-label={`Environment variable value ${idx + 1}`}
                           type={shownEnvVars.has(key) ? "text" : "password"}
                           placeholder="Value"
                           value={value}
@@ -309,6 +336,7 @@ const Sidebar = ({
               onClick={() => setShowConfig(!showConfig)}
               className="flex items-center w-full"
               data-testid="config-button"
+              aria-expanded={showConfig}
             >
               {showConfig ? (
                 <ChevronDown className="w-4 h-4 mr-2" />
@@ -325,7 +353,10 @@ const Sidebar = ({
                   return (
                     <div key={key} className="space-y-2">
                       <div className="flex items-center gap-1">
-                        <label className="text-sm font-medium text-green-600 break-all">
+                        <label
+                          className="text-sm font-medium text-green-600 break-all"
+                          htmlFor={`${configKey}-input`}
+                        >
                           {configItem.label}
                         </label>
                         <Tooltip>
@@ -339,6 +370,7 @@ const Sidebar = ({
                       </div>
                       {typeof configItem.value === "number" ? (
                         <Input
+                          id={`${configKey}-input`}
                           type="number"
                           data-testid={`${configKey}-input`}
                           value={configItem.value}
@@ -365,7 +397,7 @@ const Sidebar = ({
                             setConfig(newConfig);
                           }}
                         >
-                          <SelectTrigger>
+                          <SelectTrigger id={`${configKey}-input`}>
                             <SelectValue />
                           </SelectTrigger>
                           <SelectContent>
@@ -375,6 +407,7 @@ const Sidebar = ({
                         </Select>
                       ) : (
                         <Input
+                          id={`${configKey}-input`}
                           data-testid={`${configKey}-input`}
                           value={configItem.value}
                           onChange={(e) => {
@@ -448,14 +481,19 @@ const Sidebar = ({
 
             {loggingSupported && connectionStatus === "connected" && (
               <div className="space-y-2">
-                <label className="text-sm font-medium">Logging Level</label>
+                <label
+                  className="text-sm font-medium"
+                  htmlFor="logging-level-select"
+                >
+                  Logging Level
+                </label>
                 <Select
                   value={logLevel}
                   onValueChange={(value: LoggingLevel) =>
                     sendLogLevelRequest(value)
                   }
                 >
-                  <SelectTrigger>
+                  <SelectTrigger id="logging-level-select">
                     <SelectValue placeholder="Select logging level" />
                   </SelectTrigger>
                   <SelectContent>
diff --git a/client/src/components/ToolsTab.tsx b/client/src/components/ToolsTab.tsx
index e258bfc..2030ed7 100644
--- a/client/src/components/ToolsTab.tsx
+++ b/client/src/components/ToolsTab.tsx
@@ -5,7 +5,8 @@ import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { TabsContent } from "@/components/ui/tabs";
 import { Textarea } from "@/components/ui/textarea";
-import DynamicJsonForm, { JsonSchemaType, JsonValue } from "./DynamicJsonForm";
+import DynamicJsonForm from "./DynamicJsonForm";
+import type { JsonValue, JsonSchemaType } from "@/utils/jsonUtils";
 import { generateDefaultValue } from "@/utils/schemaUtils";
 import {
   CallToolResultSchema,
diff --git a/client/src/components/__tests__/DynamicJsonForm.test.tsx b/client/src/components/__tests__/DynamicJsonForm.test.tsx
index fce6014..1ad4d04 100644
--- a/client/src/components/__tests__/DynamicJsonForm.test.tsx
+++ b/client/src/components/__tests__/DynamicJsonForm.test.tsx
@@ -1,7 +1,7 @@
 import { render, screen, fireEvent } from "@testing-library/react";
 import { describe, it, expect, jest } from "@jest/globals";
 import DynamicJsonForm from "../DynamicJsonForm";
-import type { JsonSchemaType } from "../DynamicJsonForm";
+import type { JsonSchemaType } from "@/utils/jsonUtils";
 
 describe("DynamicJsonForm String Fields", () => {
   const renderForm = (props = {}) => {
diff --git a/client/src/utils/__tests__/jsonPathUtils.test.ts b/client/src/utils/__tests__/jsonUtils.test.ts
similarity index 54%
rename from client/src/utils/__tests__/jsonPathUtils.test.ts
rename to client/src/utils/__tests__/jsonUtils.test.ts
index b6ef7e9..055e1df 100644
--- a/client/src/utils/__tests__/jsonPathUtils.test.ts
+++ b/client/src/utils/__tests__/jsonUtils.test.ts
@@ -1,5 +1,146 @@
-import { updateValueAtPath, getValueAtPath } from "../jsonPathUtils";
-import { JsonValue } from "../../components/DynamicJsonForm";
+import {
+  getDataType,
+  tryParseJson,
+  updateValueAtPath,
+  getValueAtPath,
+} from "../jsonUtils";
+import type { JsonValue } from "../jsonUtils";
+
+describe("getDataType", () => {
+  test("should return 'string' for string values", () => {
+    expect(getDataType("hello")).toBe("string");
+    expect(getDataType("")).toBe("string");
+  });
+
+  test("should return 'number' for number values", () => {
+    expect(getDataType(123)).toBe("number");
+    expect(getDataType(0)).toBe("number");
+    expect(getDataType(-10)).toBe("number");
+    expect(getDataType(1.5)).toBe("number");
+    expect(getDataType(NaN)).toBe("number");
+    expect(getDataType(Infinity)).toBe("number");
+  });
+
+  test("should return 'boolean' for boolean values", () => {
+    expect(getDataType(true)).toBe("boolean");
+    expect(getDataType(false)).toBe("boolean");
+  });
+
+  test("should return 'undefined' for undefined value", () => {
+    expect(getDataType(undefined)).toBe("undefined");
+  });
+
+  test("should return 'object' for object values", () => {
+    expect(getDataType({})).toBe("object");
+    expect(getDataType({ key: "value" })).toBe("object");
+  });
+
+  test("should return 'array' for array values", () => {
+    expect(getDataType([])).toBe("array");
+    expect(getDataType([1, 2, 3])).toBe("array");
+    expect(getDataType(["a", "b", "c"])).toBe("array");
+    expect(getDataType([{}, { nested: true }])).toBe("array");
+  });
+
+  test("should return 'null' for null value", () => {
+    expect(getDataType(null)).toBe("null");
+  });
+});
+
+describe("tryParseJson", () => {
+  test("should correctly parse valid JSON object", () => {
+    const jsonString = '{"name":"test","value":123}';
+    const result = tryParseJson(jsonString);
+
+    expect(result.success).toBe(true);
+    expect(result.data).toEqual({ name: "test", value: 123 });
+  });
+
+  test("should correctly parse valid JSON array", () => {
+    const jsonString = '[1,2,3,"test"]';
+    const result = tryParseJson(jsonString);
+
+    expect(result.success).toBe(true);
+    expect(result.data).toEqual([1, 2, 3, "test"]);
+  });
+
+  test("should correctly parse JSON with whitespace", () => {
+    const jsonString = '  {  "name"  :  "test"  }  ';
+    const result = tryParseJson(jsonString);
+
+    expect(result.success).toBe(true);
+    expect(result.data).toEqual({ name: "test" });
+  });
+
+  test("should correctly parse nested JSON structures", () => {
+    const jsonString =
+      '{"user":{"name":"test","details":{"age":30}},"items":[1,2,3]}';
+    const result = tryParseJson(jsonString);
+
+    expect(result.success).toBe(true);
+    expect(result.data).toEqual({
+      user: {
+        name: "test",
+        details: {
+          age: 30,
+        },
+      },
+      items: [1, 2, 3],
+    });
+  });
+
+  test("should correctly parse empty objects and arrays", () => {
+    expect(tryParseJson("{}").success).toBe(true);
+    expect(tryParseJson("{}").data).toEqual({});
+
+    expect(tryParseJson("[]").success).toBe(true);
+    expect(tryParseJson("[]").data).toEqual([]);
+  });
+
+  test("should return failure for non-JSON strings", () => {
+    const nonJsonString = "this is not json";
+    const result = tryParseJson(nonJsonString);
+
+    expect(result.success).toBe(false);
+    expect(result.data).toBe(nonJsonString);
+  });
+
+  test("should return failure for malformed JSON", () => {
+    const malformedJson = '{"name":"test",}';
+    const result = tryParseJson(malformedJson);
+
+    expect(result.success).toBe(false);
+    expect(result.data).toBe(malformedJson);
+  });
+
+  test("should return failure for strings with correct delimiters but invalid JSON", () => {
+    const invalidJson = "{name:test}";
+    const result = tryParseJson(invalidJson);
+
+    expect(result.success).toBe(false);
+    expect(result.data).toBe(invalidJson);
+  });
+
+  test("should handle edge cases", () => {
+    expect(tryParseJson("").success).toBe(false);
+    expect(tryParseJson("").data).toBe("");
+
+    expect(tryParseJson("   ").success).toBe(false);
+    expect(tryParseJson("   ").data).toBe("   ");
+
+    expect(tryParseJson("null").success).toBe(false);
+    expect(tryParseJson("null").data).toBe("null");
+
+    expect(tryParseJson('"string"').success).toBe(false);
+    expect(tryParseJson('"string"').data).toBe('"string"');
+
+    expect(tryParseJson("123").success).toBe(false);
+    expect(tryParseJson("123").data).toBe("123");
+
+    expect(tryParseJson("true").success).toBe(false);
+    expect(tryParseJson("true").data).toBe("true");
+  });
+});
 
 describe("updateValueAtPath", () => {
   // Basic functionality tests
@@ -8,17 +149,17 @@ describe("updateValueAtPath", () => {
   });
 
   test("initializes an empty object when input is null/undefined and path starts with a string", () => {
-    expect(updateValueAtPath(null as any, ["foo"], "bar")).toEqual({
+    expect(updateValueAtPath(null, ["foo"], "bar")).toEqual({
       foo: "bar",
     });
-    expect(updateValueAtPath(undefined as any, ["foo"], "bar")).toEqual({
+    expect(updateValueAtPath(undefined, ["foo"], "bar")).toEqual({
       foo: "bar",
     });
   });
 
   test("initializes an empty array when input is null/undefined and path starts with a number", () => {
-    expect(updateValueAtPath(null as any, ["0"], "bar")).toEqual(["bar"]);
-    expect(updateValueAtPath(undefined as any, ["0"], "bar")).toEqual(["bar"]);
+    expect(updateValueAtPath(null, ["0"], "bar")).toEqual(["bar"]);
+    expect(updateValueAtPath(undefined, ["0"], "bar")).toEqual(["bar"]);
   });
 
   // Object update tests
@@ -152,10 +293,8 @@ describe("getValueAtPath", () => {
   });
 
   test("returns default value when input is null/undefined", () => {
-    expect(getValueAtPath(null as any, ["foo"], "default")).toBe("default");
-    expect(getValueAtPath(undefined as any, ["foo"], "default")).toBe(
-      "default",
-    );
+    expect(getValueAtPath(null, ["foo"], "default")).toBe("default");
+    expect(getValueAtPath(undefined, ["foo"], "default")).toBe("default");
   });
 
   test("handles array indices correctly", () => {
diff --git a/client/src/utils/__tests__/schemaUtils.test.ts b/client/src/utils/__tests__/schemaUtils.test.ts
index 6462e12..4c834fe 100644
--- a/client/src/utils/__tests__/schemaUtils.test.ts
+++ b/client/src/utils/__tests__/schemaUtils.test.ts
@@ -1,5 +1,5 @@
 import { generateDefaultValue, formatFieldLabel } from "../schemaUtils";
-import { JsonSchemaType } from "../../components/DynamicJsonForm";
+import type { JsonSchemaType } from "../jsonUtils";
 
 describe("generateDefaultValue", () => {
   test("generates default string", () => {
diff --git a/client/src/utils/jsonPathUtils.ts b/client/src/utils/jsonUtils.ts
similarity index 75%
rename from client/src/utils/jsonPathUtils.ts
rename to client/src/utils/jsonUtils.ts
index ac99940..28cbf30 100644
--- a/client/src/utils/jsonPathUtils.ts
+++ b/client/src/utils/jsonUtils.ts
@@ -1,7 +1,66 @@
-import { JsonValue } from "../components/DynamicJsonForm";
+export type JsonValue =
+  | string
+  | number
+  | boolean
+  | null
+  | undefined
+  | JsonValue[]
+  | { [key: string]: JsonValue };
+
+export type JsonSchemaType = {
+  type:
+    | "string"
+    | "number"
+    | "integer"
+    | "boolean"
+    | "array"
+    | "object"
+    | "null";
+  description?: string;
+  required?: boolean;
+  default?: JsonValue;
+  properties?: Record<string, JsonSchemaType>;
+  items?: JsonSchemaType;
+};
 
 export type JsonObject = { [key: string]: JsonValue };
 
+export type DataType =
+  | "string"
+  | "number"
+  | "bigint"
+  | "boolean"
+  | "symbol"
+  | "undefined"
+  | "object"
+  | "function"
+  | "array"
+  | "null";
+
+export function getDataType(value: JsonValue): DataType {
+  if (Array.isArray(value)) return "array";
+  if (value === null) return "null";
+  return typeof value;
+}
+
+export function tryParseJson(str: string): {
+  success: boolean;
+  data: JsonValue;
+} {
+  const trimmed = str.trim();
+  if (
+    !(trimmed.startsWith("{") && trimmed.endsWith("}")) &&
+    !(trimmed.startsWith("[") && trimmed.endsWith("]"))
+  ) {
+    return { success: false, data: str };
+  }
+  try {
+    return { success: true, data: JSON.parse(str) };
+  } catch {
+    return { success: false, data: str };
+  }
+}
+
 /**
  * Updates a value at a specific path in a nested JSON structure
  * @param obj The original JSON value
diff --git a/client/src/utils/schemaUtils.ts b/client/src/utils/schemaUtils.ts
index 686030f..ea92065 100644
--- a/client/src/utils/schemaUtils.ts
+++ b/client/src/utils/schemaUtils.ts
@@ -1,5 +1,4 @@
-import { JsonValue, JsonSchemaType } from "../components/DynamicJsonForm";
-import { JsonObject } from "./jsonPathUtils";
+import type { JsonValue, JsonSchemaType, JsonObject } from "./jsonUtils";
 
 /**
  * Generates a default value based on a JSON schema type