diff --git a/applications/test/string/Test-string.C b/applications/test/string/Test-string.C
index 8982cda893..88f4579df3 100644
--- a/applications/test/string/Test-string.C
+++ b/applications/test/string/Test-string.C
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2013 OpenFOAM Foundation
-    Copyright (C) 2016-2019 OpenCFD Ltd.
+    Copyright (C) 2016-2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -173,6 +173,19 @@ int main(int argc, char *argv[])
     Info<<"trimRight: " << stringOps::trimRight(test) << endl;
     Info<<"trim: " << stringOps::trim(test) << endl;
 
+    // With replace, replaceAll
+    {
+        string test2(test);
+        Info<<"replaceAny: (\"abcj\", '?')" << nl
+            << test2.replaceAny("abcj", '?') << endl;
+        Info<<"replaceAll: (\"k\", \"?\")" << nl
+            << test2.replaceAll("k", "?") << endl;
+        Info<<"replaceAll: (\"h\", null) - ie, remove them" << nl
+            << test2.replaceAll("h", "") << endl;
+        Info<<"replaceAny: (\"it${}?\", null) - ie, remove them" << nl
+            << test2.replaceAny("it${}?", '\0') << endl;
+    }
+
     if (false)
     {
         Info<<"test move construct - string size:" << test.size() << nl;
diff --git a/src/OpenFOAM/primitives/strings/string/string.C b/src/OpenFOAM/primitives/strings/string/string.C
index b7076865c5..2c6fe97082 100644
--- a/src/OpenFOAM/primitives/strings/string/string.C
+++ b/src/OpenFOAM/primitives/strings/string/string.C
@@ -156,6 +156,33 @@ Foam::string& Foam::string::replaceAll
 }
 
 
+Foam::string& Foam::string::replaceAny
+(
+    const std::string& s1,
+    const char c2,
+    size_type pos
+)
+{
+    if (s1.length())
+    {
+        while ((pos = find_first_of(s1, pos)) != npos)
+        {
+            if (c2)
+            {
+                operator[](pos) = c2;
+                ++pos;
+            }
+            else
+            {
+                erase(pos, 1);
+            }
+        }
+    }
+
+    return *this;
+}
+
+
 Foam::string& Foam::string::expand(const bool allowEmpty)
 {
     stringOps::inplaceExpand(*this, allowEmpty);
diff --git a/src/OpenFOAM/primitives/strings/string/string.H b/src/OpenFOAM/primitives/strings/string/string.H
index 829b28f978..5361ce1c2e 100644
--- a/src/OpenFOAM/primitives/strings/string/string.H
+++ b/src/OpenFOAM/primitives/strings/string/string.H
@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
-    Copyright (C) 2016-2019 OpenCFD Ltd.
+    Copyright (C) 2016-2020 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -234,7 +234,7 @@ public:
 
         //- Replace all occurrences of sub-string s1 with s2,
         //- beginning at pos in the string.
-        //  This is a no-op if s1 is empty.
+        //  A no-op if s1 is empty.
         string& replaceAll
         (
             const std::string& s1,
@@ -242,6 +242,16 @@ public:
             size_type pos = 0
         );
 
+        //- Replace any occurrence of s1 characters with c2,
+        //- beginning at pos in the string.
+        //  A no-op if s1 is empty.
+        string& replaceAny
+        (
+            const std::string& s1,
+            const char c2,
+            size_type pos = 0
+        );
+
         //- Inplace expand initial tags, tildes, and all occurrences of
         //- environment variables as per stringOps::expand
         //