diff --git a/plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/util/FileUriUtil.kt b/plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/util/FileUriUtil.kt
new file mode 100644
index 00000000000..b2821257a49
--- /dev/null
+++ b/plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/util/FileUriUtil.kt
@@ -0,0 +1,42 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.util
+
+import com.intellij.openapi.vfs.VfsUtilCore
+import com.intellij.openapi.vfs.VirtualFile
+import software.aws.toolkits.core.utils.getLogger
+import software.aws.toolkits.core.utils.warn
+import java.io.File
+import java.net.URI
+import java.net.URISyntaxException
+
+object FileUriUtil {
+
+    fun toUriString(virtualFile: VirtualFile): String? {
+        val protocol = virtualFile.fileSystem.protocol
+        val uri = when (protocol) {
+            "jar" -> VfsUtilCore.convertToURL(virtualFile.url)?.toExternalForm()
+            "jrt" -> virtualFile.url
+            else -> toUri(VfsUtilCore.virtualToIoFile(virtualFile)).toASCIIString()
+        } ?: return null
+
+        return if (virtualFile.isDirectory) {
+            uri.trimEnd('/', '\\')
+        } else {
+            uri
+        }
+    }
+
+    private fun toUri(file: File): URI {
+        try {
+            // URI scheme specified by language server protocol
+            return URI("file", "", file.absoluteFile.toURI().path, null)
+        } catch (e: URISyntaxException) {
+            LOG.warn { "${e.localizedMessage}: $e" }
+            return file.absoluteFile.toURI()
+        }
+    }
+
+    private val LOG = getLogger<FileUriUtil>()
+}
diff --git a/plugins/amazonq/shared/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/amazonq/lsp/util/FileUriUtilTest.kt b/plugins/amazonq/shared/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/amazonq/lsp/util/FileUriUtilTest.kt
new file mode 100644
index 00000000000..26c420779d0
--- /dev/null
+++ b/plugins/amazonq/shared/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/amazonq/lsp/util/FileUriUtilTest.kt
@@ -0,0 +1,150 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.util
+
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.testFramework.fixtures.BasePlatformTestCase
+import io.mockk.every
+import io.mockk.mockk
+import org.junit.Test
+
+class FileUriUtilTest : BasePlatformTestCase() {
+
+    private fun createMockVirtualFile(path: String, protocol: String = "file", isDirectory: Boolean = false): VirtualFile =
+        mockk<VirtualFile> {
+            every { fileSystem } returns mockk {
+                every { this@mockk.protocol } returns protocol
+            }
+            every { url } returns path
+            every { this@mockk.isDirectory } returns isDirectory
+        }
+
+    private fun normalizeFileUri(uri: String): String {
+        if (!System.getProperty("os.name").lowercase().contains("windows")) {
+            return uri
+        }
+
+        if (!uri.startsWith("file:///")) {
+            return uri
+        }
+
+        val path = uri.substringAfter("file:///")
+        return "file:///C:/$path"
+    }
+
+    @Test
+    fun `test basic unix path`() {
+        val virtualFile = createMockVirtualFile("/path/to/file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        val expected = normalizeFileUri("file:///path/to/file.txt")
+        assertEquals(expected, uri)
+    }
+
+    @Test
+    fun `test unix directory path`() {
+        val virtualFile = createMockVirtualFile("/path/to/directory/", isDirectory = true)
+        val uri = FileUriUtil.toUriString(virtualFile)
+        val expected = normalizeFileUri("file:///path/to/directory")
+        assertEquals(expected, uri)
+    }
+
+    @Test
+    fun `test path with spaces`() {
+        val virtualFile = createMockVirtualFile("/path/with spaces/file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        val expected = normalizeFileUri("file:///path/with%20spaces/file.txt")
+        assertEquals(expected, uri)
+    }
+
+    @Test
+    fun `test root path`() {
+        val virtualFile = createMockVirtualFile("/")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        val expected = normalizeFileUri("file:///")
+        assertEquals(expected, uri)
+    }
+
+    @Test
+    fun `test path with multiple separators`() {
+        val virtualFile = createMockVirtualFile("/path//to///file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        val expected = normalizeFileUri("file:///path/to/file.txt")
+        assertEquals(expected, uri)
+    }
+
+    @Test
+    fun `test very long path`() {
+        val longPath = "/a".repeat(256) + "/file.txt"
+        val virtualFile = createMockVirtualFile(longPath)
+        val uri = FileUriUtil.toUriString(virtualFile)
+        if (uri != null) {
+            assertTrue(uri.startsWith("file:///"))
+            assertTrue(uri.endsWith("/file.txt"))
+        }
+    }
+
+    @Test
+    fun `test relative path`() {
+        val virtualFile = createMockVirtualFile("./relative/path/file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        if (uri != null) {
+            assertTrue(uri.contains("file.txt"))
+            assertTrue(uri.startsWith("file:///"))
+        }
+    }
+
+    @Test
+    fun `test jar protocol conversion`() {
+        val virtualFile = createMockVirtualFile(
+            "jar:file:///path/to/archive.jar!/com/example/Test.class",
+            "jar"
+        )
+        val result = FileUriUtil.toUriString(virtualFile)
+        val expected = normalizeFileUri("jar:file:///path/to/archive.jar!/com/example/Test.class")
+        assertEquals(expected, result)
+    }
+
+    @Test
+    fun `test jrt protocol conversion`() {
+        val virtualFile = createMockVirtualFile(
+            "jrt://java.base/java/lang/String.class",
+            "jrt"
+        )
+        val result = FileUriUtil.toUriString(virtualFile)
+        val expected = normalizeFileUri("jrt://java.base/java/lang/String.class")
+        assertEquals(expected, result)
+    }
+
+    @Test
+    fun `test invalid jar url returns null`() {
+        val virtualFile = createMockVirtualFile(
+            "invalid:url:format",
+            "jar"
+        )
+        val result = FileUriUtil.toUriString(virtualFile)
+        assertNull(result)
+    }
+
+    @Test
+    fun `test jar protocol with directory`() {
+        val virtualFile = createMockVirtualFile(
+            "jar:file:///path/to/archive.jar!/com/example/",
+            "jar",
+            true
+        )
+        val result = FileUriUtil.toUriString(virtualFile)
+        val expected = normalizeFileUri("jar:file:///path/to/archive.jar!/com/example")
+        assertEquals(expected, result)
+    }
+
+    @Test
+    fun `test empty url in jar protocol`() {
+        val virtualFile = createMockVirtualFile(
+            "",
+            "jar",
+            true
+        )
+        val result = FileUriUtil.toUriString(virtualFile)
+        assertNull(result)
+    }
+}