diff --git a/Sources/Zip/ZipArchive+OnDisk.swift b/Sources/Zip/ZipArchive+OnDisk.swift
index a34ac2b..00c05e0 100644
--- a/Sources/Zip/ZipArchive+OnDisk.swift
+++ b/Sources/Zip/ZipArchive+OnDisk.swift
@@ -7,15 +7,20 @@ public extension ZipArchive<URL> {
     /// If the file does not exist, a new archive is created at the specified location.
     ///
     /// - Parameter fileURL: The file URL of the zip archive to be read or created.
+    /// - Parameter mode: The mode to use. The default, `Mode.readWrite`, lets you read an archive and, optionally, add new files to it. Use `Mode.overwrite` to create a new empty archive and overwrite an existing file if it exists.
     /// - Throws: An error if the initialization fails, such as if the file cannot be read or written.
-    convenience init(url fileURL: URL) throws {
+    convenience init(url fileURL: URL, mode: Mode = .readAdd) throws {
         self.init(archive: .init())
         try fileURL.withUnsafeFileSystemRepresentation { path in
-            do {
-                try get { mz_zip_reader_init_file(&$0, path, mz_uint32(MZ_ZIP_FLAG_WRITE_ALLOW_READING.rawValue)) }
-                try get { mz_zip_writer_init_from_reader_v2(&$0, path, 0) }
-            } catch ZipError.fileOpenFailed {
-                try get { mz_zip_writer_init_file_v2(&$0, path, 0, mz_uint32(MZ_ZIP_FLAG_WRITE_ALLOW_READING.rawValue)) }
+            if mode == .readAdd {
+                do {
+                    try get { mz_zip_reader_init_file(&$0, path, mz_uint32(MZ_ZIP_FLAG_WRITE_ALLOW_READING.rawValue)) }
+                    try get { mz_zip_writer_init_from_reader_v2(&$0, path, 0) }
+                } catch ZipError.fileOpenFailed {
+                    try get { mz_zip_writer_init_file_v2(&$0, path, 0, mz_uint32(MZ_ZIP_FLAG_WRITE_ALLOW_READING.rawValue)) }
+                }
+            } else {
+                try get { mz_zip_writer_init_file_v2(&$0, path, 0, 0) }
             }
         }
     }
@@ -41,4 +46,9 @@ public extension ZipArchive<URL> {
         try get { mz_zip_writer_finalize_archive(&$0) }
         mz_zip_writer_end(&archive)
     }
+
+    enum Mode {
+        case readAdd
+        case overwrite
+    }
 }
diff --git a/Tests/Tests.swift b/Tests/Tests.swift
index 275ca4e..3ff8a9a 100644
--- a/Tests/Tests.swift
+++ b/Tests/Tests.swift
@@ -3,6 +3,14 @@ import Testing
 import Foundation
 
 struct Tests {
+    let fileManager = FileManager()
+    let fileUUID = UUID()
+    var fileURL: URL {
+        fileManager.temporaryDirectory
+            .appendingPathComponent(fileUUID.uuidString)
+            .appendingPathExtension("zip")
+    }
+
     let filename = "file1"
     let filename2 = "file2"
     let filename3 = "file3"
@@ -64,25 +72,38 @@ struct Tests {
 
     @Test
     func files() throws {
-        let fileManager = FileManager()
-
-        let temp = fileManager.temporaryDirectory
-        let url = temp.appendingPathComponent(UUID().uuidString).appendingPathExtension("zip")
-
-        let archive = try ZipArchive(url: url)
+        let archive = try ZipArchive(url: fileURL)
         try archive.addFile(at: filename, data: data)
         #expect(try archive.fileContents(at: filename) == data)
         try archive.addFile(at: filename2, data: data2)
         #expect(try archive.fileContents(at: filename2) == data2)
         try archive.finalize()
 
-        let archive2 = try ZipArchive(url: url)
+        let archive2 = try ZipArchive(url: fileURL)
         #expect(try archive2.fileContents(at: filename) == data)
         try archive2.addFile(at: filename3, data: data3)
         #expect(try archive2.entries.count == 3)
         try archive2.finalize()
 
-        try? fileManager.removeItem(at: url)
+        try? fileManager.removeItem(at: fileURL)
+    }
+
+    @Test
+    func overwriteFile() throws {
+        let archive1 = try ZipArchive(url: fileURL, mode: .overwrite)
+        #expect(try archive1.entries.count == 0)
+        try archive1.addFile(at: filename, data: data)
+        try archive1.finalize()
+
+        let archive2 = try ZipArchive(url: fileURL, mode: .overwrite)
+        #expect(try archive2.entries.count == 0)
+        try archive2.addFile(at: filename, data: data2)
+        try archive2.finalize()
+
+        let archive3 = try ZipArchive(url: fileURL, mode: .readAdd)
+        #expect(try archive3.entries.count == 1)
+        #expect(try archive3.fileContents(at: filename) == data2)
+        archive3.close()
     }
 
     @Test