diff --git a/.changeset/clever-spiders-pick.md b/.changeset/clever-spiders-pick.md
new file mode 100644
index 00000000..5cd33dfe
--- /dev/null
+++ b/.changeset/clever-spiders-pick.md
@@ -0,0 +1,5 @@
+---
+'astro-purgecss': patch
+---
+
+Fix broken path handling on Windows
diff --git a/packages/astro-purgecss/src/index.ts b/packages/astro-purgecss/src/index.ts
index 0214b9ea..2ba5d012 100644
--- a/packages/astro-purgecss/src/index.ts
+++ b/packages/astro-purgecss/src/index.ts
@@ -1,6 +1,6 @@
 import type { AstroConfig, AstroIntegration } from 'astro';
 import { existsSync } from 'node:fs';
-import { join } from 'node:path';
+import { join, relative } from 'node:path';
 import { randomUUID } from 'node:crypto';
 import { PurgeCSS, type UserDefinedOptions, type RawContent } from 'purgecss';
 
@@ -140,7 +140,7 @@ function Plugin(options: PurgeCSSOptions = {}): AstroIntegration {
           await Promise.all(
             purgedCssFiles.map(async ({ css, file }) => {
               await writeCssFile(file, css, file);
-              success(file.replace(outDir, ''));
+              success(relative(outDir, file));
             })
           );
           logger.info('🎉 Purging completed successfully!');
@@ -156,7 +156,7 @@ function Plugin(options: PurgeCSSOptions = {}): AstroIntegration {
             // ex: assets/styles/light.css
             if (!isAssetFile) {
               await writeCssFile(file, css, file);
-              const relativePath = file.replace(outDir, '');
+              const relativePath = relative(outDir, file);
               success(relativePath);
               return {
                 oldFilename: relativePath,
@@ -168,8 +168,8 @@ function Plugin(options: PurgeCSSOptions = {}): AstroIntegration {
             const hashedFilename = generateFileHash(file, css);
             await writeCssFile(hashedFilename, css, file);
 
-            const relativeOldPath = file.replace(outDir, '');
-            const relativeNewPath = hashedFilename.replace(outDir, '');
+            const relativeOldPath = relative(outDir, file);
+            const relativeNewPath = relative(outDir, hashedFilename);
             success(relativeNewPath);
 
             return {
@@ -251,7 +251,7 @@ function Plugin(options: PurgeCSSOptions = {}): AstroIntegration {
               }
 
               await writeFileContent(htmlFile, content);
-              success(htmlFile.replace(outDir, ''));
+              success(relative(outDir, htmlFile));
             })
           );
         }
diff --git a/packages/astro-purgecss/src/utils.ts b/packages/astro-purgecss/src/utils.ts
index 51f84edf..7517be42 100644
--- a/packages/astro-purgecss/src/utils.ts
+++ b/packages/astro-purgecss/src/utils.ts
@@ -44,14 +44,14 @@ export function generateFileHash(filePath: string, content: string) {
   return `${filePath.slice(0, -13)}.${hash}.css`;
 }
 
-// Clean from extra slash on windows and trailing forward slash on non-windows
+// Clean from trailing slash and extra leading slash on windows
 export function cleanPath(file: URL): string {
   if (!(file instanceof URL)) {
     throw new TypeError('Expected a URL object');
   }
 
-  // Remove trailing forward slash if present
-  let path = fileURLToPath(file).replace(/\/+$/, '');
+  // Remove trailing slash if present
+  let path = fileURLToPath(file).replace(/(?:\/+|\\+)$/, '');
 
   // Remove leading forward slash on windows if present
   return process.platform === 'win32' ? path.replace(/^\/+/, '') : path;