diff --git a/iofs.go b/iofs.go
index 77f62c6..c803455 100644
--- a/iofs.go
+++ b/iofs.go
@@ -3,8 +3,11 @@
 package afero
 
 import (
+	"io"
 	"io/fs"
+	"os"
 	"path"
+	"time"
 )
 
 // IOFS adopts afero.Fs to stdlib io/fs.FS
@@ -136,3 +139,150 @@ func (r readDirFile) ReadDir(n int) ([]fs.DirEntry, error) {
 
 	return ret, nil
 }
+
+// FromIOFS adopts io/fs.FS to use it as afero.Fs
+// Note that io/fs.FS is read-only so all mutating methods will return fs.PathError with fs.ErrPermission
+// To store modifications you may use afero.CopyOnWriteFs
+type FromIOFS struct {
+	fs.FS
+}
+
+var _ Fs = FromIOFS{}
+
+func (f FromIOFS) Create(name string) (File, error) { return nil, notImplemented("create", name) }
+
+func (f FromIOFS) Mkdir(name string, perm os.FileMode) error { return notImplemented("mkdir", name) }
+
+func (f FromIOFS) MkdirAll(path string, perm os.FileMode) error {
+	return notImplemented("mkdirall", path)
+}
+
+func (f FromIOFS) Open(name string) (File, error) {
+	file, err := f.FS.Open(name)
+	if err != nil {
+		return nil, err
+	}
+
+	return fromIOFSFile{File: file, name: name}, nil
+}
+
+func (f FromIOFS) OpenFile(name string, flag int, perm os.FileMode) (File, error) {
+	return f.Open(name)
+}
+
+func (f FromIOFS) Remove(name string) error {
+	return notImplemented("remove", name)
+}
+
+func (f FromIOFS) RemoveAll(path string) error {
+	return notImplemented("removeall", path)
+}
+
+func (f FromIOFS) Rename(oldname, newname string) error {
+	return notImplemented("rename", oldname)
+}
+
+func (f FromIOFS) Stat(name string) (os.FileInfo, error) { return fs.Stat(f.FS, name) }
+
+func (f FromIOFS) Name() string { return "fromiofs" }
+
+func (f FromIOFS) Chmod(name string, mode os.FileMode) error {
+	return notImplemented("chmod", name)
+}
+
+func (f FromIOFS) Chown(name string, uid, gid int) error {
+	return notImplemented("chown", name)
+}
+
+func (f FromIOFS) Chtimes(name string, atime time.Time, mtime time.Time) error {
+	return notImplemented("chtimes", name)
+}
+
+type fromIOFSFile struct {
+	fs.File
+	name string
+}
+
+func (f fromIOFSFile) ReadAt(p []byte, off int64) (n int, err error) {
+	readerAt, ok := f.File.(io.ReaderAt)
+	if !ok {
+		return -1, notImplemented("readat", f.name)
+	}
+
+	return readerAt.ReadAt(p, off)
+}
+
+func (f fromIOFSFile) Seek(offset int64, whence int) (int64, error) {
+	seeker, ok := f.File.(io.Seeker)
+	if !ok {
+		return -1, notImplemented("seek", f.name)
+	}
+
+	return seeker.Seek(offset, whence)
+}
+
+func (f fromIOFSFile) Write(p []byte) (n int, err error) {
+	return -1, notImplemented("write", f.name)
+}
+
+func (f fromIOFSFile) WriteAt(p []byte, off int64) (n int, err error) {
+	return -1, notImplemented("writeat", f.name)
+}
+
+func (f fromIOFSFile) Name() string { return f.name }
+
+func (f fromIOFSFile) Readdir(count int) ([]os.FileInfo, error) {
+	rdfile, ok := f.File.(fs.ReadDirFile)
+	if !ok {
+		return nil, notImplemented("readdir", f.name)
+	}
+
+	entries, err := rdfile.ReadDir(count)
+	if err != nil {
+		return nil, err
+	}
+
+	ret := make([]os.FileInfo, len(entries))
+	for i := range entries {
+		ret[i], err = entries[i].Info()
+
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return ret, nil
+}
+
+func (f fromIOFSFile) Readdirnames(n int) ([]string, error) {
+	rdfile, ok := f.File.(fs.ReadDirFile)
+	if !ok {
+		return nil, notImplemented("readdir", f.name)
+	}
+
+	entries, err := rdfile.ReadDir(n)
+	if err != nil {
+		return nil, err
+	}
+
+	ret := make([]string, len(entries))
+	for i := range entries {
+		ret[i] = entries[i].Name()
+	}
+
+	return ret, nil
+}
+
+func (f fromIOFSFile) Sync() error { return nil }
+
+func (f fromIOFSFile) Truncate(size int64) error {
+	return notImplemented("truncate", f.name)
+}
+
+func (f fromIOFSFile) WriteString(s string) (ret int, err error) {
+	return -1, notImplemented("writestring", f.name)
+}
+
+func notImplemented(op, path string) error {
+	return &fs.PathError{Op: op, Path: path, Err: fs.ErrPermission}
+}
diff --git a/iofs_test.go b/iofs_test.go
index bd4893b..1d310e5 100644
--- a/iofs_test.go
+++ b/iofs_test.go
@@ -3,9 +3,14 @@
 package afero
 
 import (
+	"bytes"
+	"errors"
+	"io"
+	"io/fs"
 	"os"
 	"testing"
 	"testing/fstest"
+	"time"
 )
 
 func TestIOFS(t *testing.T) {
@@ -51,3 +56,357 @@ func TestIOFS(t *testing.T) {
 		}
 	})
 }
+
+func TestFromIOFS(t *testing.T) {
+	t.Parallel()
+
+	fsys := fstest.MapFS{
+		"test.txt": {
+			Data:    []byte("File in root"),
+			Mode:    fs.ModePerm,
+			ModTime: time.Now(),
+		},
+		"dir1": {
+			Mode:    fs.ModeDir | fs.ModePerm,
+			ModTime: time.Now(),
+		},
+		"dir1/dir2": {
+			Mode:    fs.ModeDir | fs.ModePerm,
+			ModTime: time.Now(),
+		},
+		"dir1/dir2/hello.txt": {
+			Data:    []byte("Hello world"),
+			Mode:    fs.ModePerm,
+			ModTime: time.Now(),
+		},
+	}
+
+	fromIOFS := FromIOFS{fsys}
+
+	t.Run("Create", func(t *testing.T) {
+		_, err := fromIOFS.Create("test")
+		assertPermissionError(t, err)
+	})
+
+	t.Run("Mkdir", func(t *testing.T) {
+		err := fromIOFS.Mkdir("test", 0)
+		assertPermissionError(t, err)
+	})
+
+	t.Run("MkdirAll", func(t *testing.T) {
+		err := fromIOFS.Mkdir("test", 0)
+		assertPermissionError(t, err)
+	})
+
+	t.Run("Open", func(t *testing.T) {
+		t.Run("non existing file", func(t *testing.T) {
+			_, err := fromIOFS.Open("nonexisting")
+			if !errors.Is(err, fs.ErrNotExist) {
+				t.Errorf("Expected error to be fs.ErrNotExist, got %[1]T (%[1]v)", err)
+			}
+		})
+
+		t.Run("directory", func(t *testing.T) {
+			dirFile, err := fromIOFS.Open("dir1")
+			if err != nil {
+				t.Errorf("dir1 open failed: %v", err)
+				return
+			}
+
+			defer dirFile.Close()
+
+			dirStat, err := dirFile.Stat()
+			if err != nil {
+				t.Errorf("dir1 stat failed: %v", err)
+				return
+			}
+
+			if !dirStat.IsDir() {
+				t.Errorf("dir1 stat told that it is not a directory")
+				return
+			}
+		})
+
+		t.Run("simple file", func(t *testing.T) {
+			file, err := fromIOFS.Open("test.txt")
+			if err != nil {
+				t.Errorf("test.txt open failed: %v", err)
+				return
+			}
+
+			defer file.Close()
+
+			fileStat, err := file.Stat()
+			if err != nil {
+				t.Errorf("test.txt stat failed: %v", err)
+				return
+			}
+
+			if fileStat.IsDir() {
+				t.Errorf("test.txt stat told that it is a directory")
+				return
+			}
+		})
+	})
+
+	t.Run("Remove", func(t *testing.T) {
+		err := fromIOFS.Remove("test")
+		assertPermissionError(t, err)
+	})
+
+	t.Run("Rename", func(t *testing.T) {
+		err := fromIOFS.Rename("test", "test2")
+		assertPermissionError(t, err)
+	})
+
+	t.Run("Stat", func(t *testing.T) {
+		t.Run("non existing file", func(t *testing.T) {
+			_, err := fromIOFS.Stat("nonexisting")
+			if !errors.Is(err, fs.ErrNotExist) {
+				t.Errorf("Expected error to be fs.ErrNotExist, got %[1]T (%[1]v)", err)
+			}
+		})
+
+		t.Run("directory", func(t *testing.T) {
+			stat, err := fromIOFS.Stat("dir1/dir2")
+			if err != nil {
+				t.Errorf("dir1/dir2 stat failed: %v", err)
+				return
+			}
+
+			if !stat.IsDir() {
+				t.Errorf("dir1/dir2 stat told that it is not a directory")
+				return
+			}
+		})
+
+		t.Run("file", func(t *testing.T) {
+			stat, err := fromIOFS.Stat("dir1/dir2/hello.txt")
+			if err != nil {
+				t.Errorf("dir1/dir2 stat failed: %v", err)
+				return
+			}
+
+			if stat.IsDir() {
+				t.Errorf("dir1/dir2/hello.txt stat told that it is a directory")
+				return
+			}
+
+			if lenFile := len(fsys["dir1/dir2/hello.txt"].Data); int64(lenFile) != stat.Size() {
+				t.Errorf("dir1/dir2/hello.txt stat told invalid size: expected %d, got %d", lenFile, stat.Size())
+				return
+			}
+		})
+	})
+
+	t.Run("Chmod", func(t *testing.T) {
+		err := fromIOFS.Chmod("test", os.ModePerm)
+		assertPermissionError(t, err)
+	})
+
+	t.Run("Chown", func(t *testing.T) {
+		err := fromIOFS.Chown("test", 0, 0)
+		assertPermissionError(t, err)
+	})
+
+	t.Run("Chtimes", func(t *testing.T) {
+		err := fromIOFS.Chtimes("test", time.Now(), time.Now())
+		assertPermissionError(t, err)
+	})
+}
+
+func TestFromIOFS_File(t *testing.T) {
+	t.Parallel()
+
+	fsys := fstest.MapFS{
+		"test.txt": {
+			Data:    []byte("File in root"),
+			Mode:    fs.ModePerm,
+			ModTime: time.Now(),
+		},
+		"dir1": {
+			Mode:    fs.ModeDir | fs.ModePerm,
+			ModTime: time.Now(),
+		},
+		"dir2": {
+			Mode:    fs.ModeDir | fs.ModePerm,
+			ModTime: time.Now(),
+		},
+	}
+
+	fromIOFS := FromIOFS{fsys}
+
+	file, err := fromIOFS.Open("test.txt")
+	if err != nil {
+		t.Errorf("test.txt open failed: %v", err)
+		return
+	}
+
+	defer file.Close()
+
+	fileStat, err := file.Stat()
+	if err != nil {
+		t.Errorf("test.txt stat failed: %v", err)
+		return
+	}
+
+	if fileStat.IsDir() {
+		t.Errorf("test.txt stat told that it is a directory")
+		return
+	}
+
+	t.Run("ReadAt", func(t *testing.T) {
+		// MapFS files implements io.ReaderAt
+		b := make([]byte, 2)
+		_, err := file.ReadAt(b, 2)
+
+		if err != nil {
+			t.Errorf("ReadAt failed: %v", err)
+			return
+		}
+
+		if expectedData := fsys["test.txt"].Data[2:4]; !bytes.Equal(b, expectedData) {
+			t.Errorf("Unexpected content read: %s, expected %s", b, expectedData)
+		}
+	})
+
+	t.Run("Seek", func(t *testing.T) {
+		n, err := file.Seek(2, io.SeekStart)
+		if err != nil {
+			t.Errorf("Seek failed: %v", err)
+			return
+		}
+
+		if n != 2 {
+			t.Errorf("Seek returned unexpected value: %d, expected 2", n)
+		}
+	})
+
+	t.Run("Write", func(t *testing.T) {
+		_, err := file.Write(nil)
+		assertPermissionError(t, err)
+	})
+
+	t.Run("WriteAt", func(t *testing.T) {
+		_, err := file.WriteAt(nil, 0)
+		assertPermissionError(t, err)
+	})
+
+	t.Run("Name", func(t *testing.T) {
+		if name := file.Name(); name != "test.txt" {
+			t.Errorf("expected file.Name() == test.txt, got %s", name)
+		}
+	})
+
+	t.Run("Readdir", func(t *testing.T) {
+		t.Run("not directory", func(t *testing.T) {
+			_, err := file.Readdir(-1)
+			assertPermissionError(t, err)
+		})
+
+		t.Run("root directory", func(t *testing.T) {
+			root, err := fromIOFS.Open(".")
+			if err != nil {
+				t.Errorf("root open failed: %v", err)
+				return
+			}
+
+			defer root.Close()
+
+			items, err := root.Readdir(-1)
+			if err != nil {
+				t.Errorf("Readdir error: %v", err)
+				return
+			}
+
+			var expectedItems = []struct {
+				Name  string
+				IsDir bool
+				Size  int64
+			}{
+				{Name: "dir1", IsDir: true, Size: 0},
+				{Name: "dir2", IsDir: true, Size: 0},
+				{Name: "test.txt", IsDir: false, Size: int64(len(fsys["test.txt"].Data))},
+			}
+
+			if len(expectedItems) != len(items) {
+				t.Errorf("Items count mismatch, expected %d, got %d", len(expectedItems), len(items))
+				return
+			}
+
+			for i, item := range items {
+				if item.Name() != expectedItems[i].Name {
+					t.Errorf("Item %d: expected name %s, got %s", i, expectedItems[i].Name, item.Name())
+				}
+
+				if item.IsDir() != expectedItems[i].IsDir {
+					t.Errorf("Item %d: expected IsDir %t, got %t", i, expectedItems[i].IsDir, item.IsDir())
+				}
+
+				if item.Size() != expectedItems[i].Size {
+					t.Errorf("Item %d: expected IsDir %d, got %d", i, expectedItems[i].Size, item.Size())
+				}
+			}
+		})
+	})
+
+	t.Run("Readdirnames", func(t *testing.T) {
+		t.Run("not directory", func(t *testing.T) {
+			_, err := file.Readdirnames(-1)
+			assertPermissionError(t, err)
+		})
+
+		t.Run("root directory", func(t *testing.T) {
+			root, err := fromIOFS.Open(".")
+			if err != nil {
+				t.Errorf("root open failed: %v", err)
+				return
+			}
+
+			defer root.Close()
+
+			items, err := root.Readdirnames(-1)
+			if err != nil {
+				t.Errorf("Readdirnames error: %v", err)
+				return
+			}
+
+			var expectedItems = []string{"dir1", "dir2", "test.txt"}
+
+			if len(expectedItems) != len(items) {
+				t.Errorf("Items count mismatch, expected %d, got %d", len(expectedItems), len(items))
+				return
+			}
+
+			for i, item := range items {
+				if item != expectedItems[i] {
+					t.Errorf("Item %d: expected name %s, got %s", i, expectedItems[i], item)
+				}
+			}
+		})
+	})
+
+	t.Run("Truncate", func(t *testing.T) {
+		err := file.Truncate(1)
+		assertPermissionError(t, err)
+	})
+
+	t.Run("WriteString", func(t *testing.T) {
+		_, err := file.WriteString("a")
+		assertPermissionError(t, err)
+	})
+}
+
+func assertPermissionError(t *testing.T, err error) {
+	t.Helper()
+
+	var perr *fs.PathError
+	if !errors.As(err, &perr) {
+		t.Errorf("Expected *fs.PathError, got %[1]T (%[1]v)", err)
+		return
+	}
+
+	if perr.Err != fs.ErrPermission {
+		t.Errorf("Expected (*fs.PathError).Err == fs.ErrPermisson, got %[1]T (%[1]v)", err)
+	}
+}