diff --git a/iseol.go b/iseol.go
new file mode 100644
index 0000000..f0ef62b
--- /dev/null
+++ b/iseol.go
@@ -0,0 +1,20 @@
+package eol
+
+import (
+	"sourcecode.social/reiver/go-eol/cr"
+	"sourcecode.social/reiver/go-eol/ff"
+	"sourcecode.social/reiver/go-eol/lf"
+	"sourcecode.social/reiver/go-eol/ls"
+	"sourcecode.social/reiver/go-eol/nel"
+	"sourcecode.social/reiver/go-eol/ps"
+	"sourcecode.social/reiver/go-eol/vt"
+)
+
+func IsEOL(r rune) bool {
+	switch r {
+	case cr.Rune, ff.Rune, lf.Rune, ls.Rune, nel.Rune, ps.Rune, vt.Rune:
+		return true
+	default:
+		return false
+	}
+}