diff --git a/src/core/meshcop/commissioner.cpp b/src/core/meshcop/commissioner.cpp
index 0790d1825..b2227fd69 100644
--- a/src/core/meshcop/commissioner.cpp
+++ b/src/core/meshcop/commissioner.cpp
@@ -280,7 +280,7 @@ otError Commissioner::AddJoiner(const Mac::ExtAddress *aEui64, const char *aPskd
 
     VerifyOrExit(mState == OT_COMMISSIONER_STATE_ACTIVE, error = OT_ERROR_INVALID_STATE);
 
-    VerifyOrExit(MeshCoP::Joiner::IsPskdValid(aPskd), error = OT_ERROR_INVALID_ARGS);
+    VerifyOrExit(IsPskdValid(aPskd), error = OT_ERROR_INVALID_ARGS);
 
     IgnoreError(RemoveJoiner(aEui64, 0, kJoinerOpFlagNotNotifyLeader)); // remove immediately
 
diff --git a/src/core/meshcop/joiner.cpp b/src/core/meshcop/joiner.cpp
index b6eb82caa..79f58a424 100644
--- a/src/core/meshcop/joiner.cpp
+++ b/src/core/meshcop/joiner.cpp
@@ -87,30 +87,6 @@ exit:
     return;
 }
 
-bool Joiner::IsPskdValid(const char *aPskd)
-{
-    bool   valid      = false;
-    size_t pskdLength = StringLength(aPskd, kPskdMaxLength + 1);
-
-    OT_STATIC_ASSERT(static_cast<uint8_t>(kPskdMaxLength) <= static_cast<uint8_t>(Dtls::kPskMaxLength),
-                     "The maximum length of DTLS PSK is smaller than joiner PSKd");
-
-    VerifyOrExit(pskdLength >= kPskdMinLength && pskdLength <= kPskdMaxLength, OT_NOOP);
-
-    for (size_t i = 0; i < pskdLength; i++)
-    {
-        char c = aPskd[i];
-
-        VerifyOrExit(isdigit(c) || isupper(c), OT_NOOP);
-        VerifyOrExit(c != 'I' && c != 'O' && c != 'Q' && c != 'Z', OT_NOOP);
-    }
-
-    valid = true;
-
-exit:
-    return valid;
-}
-
 otError Joiner::Start(const char *     aPskd,
                       const char *     aProvisioningUrl,
                       const char *     aVendorName,
diff --git a/src/core/meshcop/joiner.hpp b/src/core/meshcop/joiner.hpp
index fc12eff63..168edb9a0 100644
--- a/src/core/meshcop/joiner.hpp
+++ b/src/core/meshcop/joiner.hpp
@@ -109,29 +109,12 @@ public:
      */
     void GetJoinerId(Mac::ExtAddress &aJoinerId) const;
 
-    /**
-     * This method validates the PSKd.
-     *
-     * Per Thread specification, a Joining Device Credential is encoded as
-     * uppercase alphanumeric characters (base32-thread: 0-9, A-Z excluding
-     * I, O, Q, and Z for readability) with a minimum length of 6 such
-     * characters and a maximum length of 32 such characters.
-     *
-     * param[in]  aPskd  The PSKd to validate.
-     *
-     * @retval A boolean indicates whether the given @p aPskd is valid.
-     *
-     */
-    static bool IsPskdValid(const char *aPskd);
-
 private:
     enum
     {
         kJoinerUdpPort         = OPENTHREAD_CONFIG_JOINER_UDP_PORT,
         kConfigExtAddressDelay = 100,  ///< [milliseconds]
         kReponseTimeout        = 4000, ///< Maximum wait time to receive response [milliseconds].
-        kPskdMinLength         = 6,    ///< Minimum PSKd length.
-        kPskdMaxLength         = 32,   ///< Maximum PSKd Length.
     };
 
     struct JoinerRouter
diff --git a/src/core/meshcop/meshcop.cpp b/src/core/meshcop/meshcop.cpp
index fb60b092f..0be925845 100644
--- a/src/core/meshcop/meshcop.cpp
+++ b/src/core/meshcop/meshcop.cpp
@@ -44,6 +44,12 @@
 namespace ot {
 namespace MeshCoP {
 
+enum
+{
+    kPskdMinLength = 6,  ///< Minimum PSKd length.
+    kPskdMaxLength = 32, ///< Maximum PSKd Length.
+};
+
 void SteeringData::Init(uint8_t aLength)
 {
     OT_ASSERT(aLength <= kMaxLength);
@@ -181,5 +187,31 @@ exit:
 }
 #endif // OPENTHREAD_FTD
 
+#if OPENTHREAD_CONFIG_JOINER_ENABLE || OPENTHREAD_CONFIG_COMMISSIONER_ENABLE
+bool IsPskdValid(const char *aPskd)
+{
+    bool   valid      = false;
+    size_t pskdLength = StringLength(aPskd, kPskdMaxLength + 1);
+
+    OT_STATIC_ASSERT(static_cast<uint8_t>(kPskdMaxLength) <= static_cast<uint8_t>(Dtls::kPskMaxLength),
+                     "The maximum length of DTLS PSK is smaller than joiner PSKd");
+
+    VerifyOrExit(pskdLength >= kPskdMinLength && pskdLength <= kPskdMaxLength, OT_NOOP);
+
+    for (size_t i = 0; i < pskdLength; i++)
+    {
+        char c = aPskd[i];
+
+        VerifyOrExit(isdigit(c) || isupper(c), OT_NOOP);
+        VerifyOrExit(c != 'I' && c != 'O' && c != 'Q' && c != 'Z', OT_NOOP);
+    }
+
+    valid = true;
+
+exit:
+    return valid;
+}
+#endif // OPENTHREAD_CONFIG_JOINER_ENABLE || OPENTHREAD_CONFIG_COMMISSIONER_ENABLE
+
 } // namespace MeshCoP
 } // namespace ot
diff --git a/src/core/meshcop/meshcop.hpp b/src/core/meshcop/meshcop.hpp
index 99c42531e..dfebc2fcd 100644
--- a/src/core/meshcop/meshcop.hpp
+++ b/src/core/meshcop/meshcop.hpp
@@ -255,6 +255,23 @@ void ComputeJoinerId(const Mac::ExtAddress &aEui64, Mac::ExtAddress &aJoinerId);
  */
 otError GetBorderAgentRloc(ThreadNetif &aNetIf, uint16_t &aRloc);
 
+#if OPENTHREAD_CONFIG_JOINER_ENABLE || OPENTHREAD_CONFIG_COMMISSIONER_ENABLE
+/**
+ * This method validates the PSKd.
+ *
+ * Per Thread specification, a Joining Device Credential is encoded as
+ * uppercase alphanumeric characters (base32-thread: 0-9, A-Z excluding
+ * I, O, Q, and Z for readability) with a minimum length of 6 such
+ * characters and a maximum length of 32 such characters.
+ *
+ * param[in]  aPskd  The PSKd to validate.
+ *
+ * @retval A boolean indicates whether the given @p aPskd is valid.
+ *
+ */
+bool IsPskdValid(const char *aPskd);
+#endif // OPENTHREAD_CONFIG_JOINER_ENABLE || OPENTHREAD_CONFIG_COMMISSIONER_ENABLE
+
 } // namespace MeshCoP
 
 } // namespace ot