diff --git a/.github/workflows/run-java-test.yaml b/.github/workflows/run-java-test.yaml
index 37719b61..d865d5b5 100644
--- a/.github/workflows/run-java-test.yaml
+++ b/.github/workflows/run-java-test.yaml
@@ -106,6 +106,14 @@ jobs:
             make -j4
             ls -lh lib
 
+      - name:  Run java test (add punctuations)
+        shell: bash
+        run: |
+          cd ./java-api-examples
+          ./run-add-punctuation-zh-en.sh
+          # Delete model files to save space
+          rm -rf sherpa-onnx-punct-*
+
       - name:  Run java test (Spoken language identification)
         shell: bash
         run: |
diff --git a/java-api-examples/AddPunctuation.java b/java-api-examples/AddPunctuation.java
new file mode 100644
index 00000000..5eeba4eb
--- /dev/null
+++ b/java-api-examples/AddPunctuation.java
@@ -0,0 +1,40 @@
+// Copyright 2024 Xiaomi Corporation
+
+// This file shows how to use a punctuation model to add punctuations to text.
+//
+// The model supports both English and Chinese.
+import com.k2fsa.sherpa.onnx.*;
+
+public class AddPunctuation {
+  public static void main(String[] args) {
+    // please download the model from
+    // https://github.com/k2-fsa/sherpa-onnx/releases/tag/punctuation-models
+    String model = "./sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12/model.onnx";
+    OfflinePunctuationModelConfig modelConfig =
+        OfflinePunctuationModelConfig.builder()
+            .setCtTransformer(model)
+            .setNumThreads(1)
+            .setDebug(true)
+            .build();
+    OfflinePunctuationConfig config =
+        OfflinePunctuationConfig.builder().setModel(modelConfig).build();
+
+    OfflinePunctuation punct = new OfflinePunctuation(config);
+
+    String[] sentences =
+        new String[] {
+          "这是一个测试你好吗How are you我很好thank you are you ok谢谢你",
+          "我们都是木头人不会说话不会动",
+          "The African blogosphere is rapidly expanding bringing more voices online in the form of"
+              + " commentaries opinions analyses rants and poetry",
+        };
+
+    System.out.println("---");
+    for (String text : sentences) {
+      String out = punct.addPunctuation(text);
+      System.out.printf("Input: %s\n", text);
+      System.out.printf("Output: %s\n", out);
+      System.out.println("---");
+    }
+  }
+}
diff --git a/java-api-examples/README.md b/java-api-examples/README.md
index e40de7b6..51e8bb1f 100755
--- a/java-api-examples/README.md
+++ b/java-api-examples/README.md
@@ -35,3 +35,11 @@ This directory contains examples for the JAVA API of sherpa-onnx.
 ```bash
 ./run-spoken-language-identification-whisper.sh
 ```
+
+## Add puncutations to text
+
+The punctuation model supports both English and Chinese.
+
+```bash
+./run-add-punctuation-zh-en.sh
+```
diff --git a/java-api-examples/run-add-punctuation-zh-en.sh b/java-api-examples/run-add-punctuation-zh-en.sh
new file mode 100755
index 00000000..4a440193
--- /dev/null
+++ b/java-api-examples/run-add-punctuation-zh-en.sh
@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+
+set -ex
+
+if [[ ! -f ../build/lib/libsherpa-onnx-jni.dylib  && ! -f ../build/lib/libsherpa-onnx-jni.so ]]; then
+  mkdir -p ../build
+  pushd ../build
+  cmake \
+    -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+    -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+    -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+    -DBUILD_SHARED_LIBS=ON \
+    -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+    -DSHERPA_ONNX_ENABLE_JNI=ON \
+    ..
+
+  make -j4
+  ls -lh lib
+  popd
+fi
+
+if [ ! -f ../sherpa-onnx/java-api/build/sherpa-onnx.jar ]; then
+  pushd ../sherpa-onnx/java-api
+  make
+  popd
+fi
+
+if [[ ! -f ../build/lib/libsherpa-onnx-jni.dylib  && ! -f ../build/lib/libsherpa-onnx-jni.so ]]; then
+  cmake \
+    -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+    -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+    -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+    -DBUILD_SHARED_LIBS=ON \
+    -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+    -DSHERPA_ONNX_ENABLE_JNI=ON \
+    ..
+
+  make -j4
+  ls -lh lib
+fi
+
+if [ ! -f ./sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12/model.onnx ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/punctuation-models/sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+  tar xvf sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+  rm sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+fi
+
+java \
+  -Djava.library.path=$PWD/../build/lib \
+  -cp ../sherpa-onnx/java-api/build/sherpa-onnx.jar \
+  ./AddPunctuation.java
diff --git a/kotlin-api-examples/OfflinePunctuation.kt b/kotlin-api-examples/OfflinePunctuation.kt
new file mode 120000
index 00000000..77341b73
--- /dev/null
+++ b/kotlin-api-examples/OfflinePunctuation.kt
@@ -0,0 +1 @@
+../sherpa-onnx/kotlin-api/OfflinePunctuation.kt
\ No newline at end of file
diff --git a/kotlin-api-examples/run.sh b/kotlin-api-examples/run.sh
index 31074837..79856bc9 100755
--- a/kotlin-api-examples/run.sh
+++ b/kotlin-api-examples/run.sh
@@ -197,9 +197,29 @@ function testOfflineAsr() {
   java -Djava.library.path=../build/lib -jar $out_filename
 }
 
+function testPunctuation() {
+  if [ ! -f ./sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12/model.onnx ]; then
+    curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/punctuation-models/sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+    tar xvf sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+    rm sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12.tar.bz2
+  fi
+
+  out_filename=test_punctuation.jar
+  kotlinc-jvm -include-runtime -d $out_filename \
+    ./test_punctuation.kt \
+    ./OfflinePunctuation.kt \
+    faked-asset-manager.kt \
+    faked-log.kt
+
+  ls -lh $out_filename
+
+  java -Djava.library.path=../build/lib -jar $out_filename
+}
+
 testSpeakerEmbeddingExtractor
 testOnlineAsr
 testTts
 testAudioTagging
 testSpokenLanguageIdentification
 testOfflineAsr
+testPunctuation
diff --git a/kotlin-api-examples/test_punctuation.kt b/kotlin-api-examples/test_punctuation.kt
new file mode 100644
index 00000000..8450b8dd
--- /dev/null
+++ b/kotlin-api-examples/test_punctuation.kt
@@ -0,0 +1,31 @@
+package com.k2fsa.sherpa.onnx
+
+fun main() {
+  testPunctuation()
+}
+
+fun testPunctuation() {
+  val config = OfflinePunctuationConfig(
+      model=OfflinePunctuationModelConfig(
+          ctTransformer="./sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12/model.onnx",
+          numThreads=1,
+          debug=true,
+          provider="cpu",
+      )
+  )
+  val punct = OfflinePunctuation(config = config)
+  val sentences = arrayOf(
+        "这是一个测试你好吗How are you我很好thank you are you ok谢谢你",
+        "我们都是木头人不会说话不会动",
+        "The African blogosphere is rapidly expanding bringing more voices online in the form of commentaries opinions analyses rants and poetry",
+  )
+  println("---")
+  for (text in sentences) {
+    val out = punct.addPunctuation(text)
+    println("Input: $text")
+    println("Output: $out")
+    println("---")
+  }
+  println(sentences)
+
+}
diff --git a/sherpa-onnx/csrc/offline-punctuation-ct-transformer-impl.h b/sherpa-onnx/csrc/offline-punctuation-ct-transformer-impl.h
index 4414a5a8..9699563c 100644
--- a/sherpa-onnx/csrc/offline-punctuation-ct-transformer-impl.h
+++ b/sherpa-onnx/csrc/offline-punctuation-ct-transformer-impl.h
@@ -9,6 +9,11 @@
 #include <utility>
 #include <vector>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/macros.h"
 #include "sherpa-onnx/csrc/math.h"
 #include "sherpa-onnx/csrc/offline-ct-transformer-model.h"
@@ -24,6 +29,12 @@ class OfflinePunctuationCtTransformerImpl : public OfflinePunctuationImpl {
       const OfflinePunctuationConfig &config)
       : config_(config), model_(config.model) {}
 
+#if __ANDROID_API__ >= 9
+  OfflinePunctuationCtTransformerImpl(AAssetManager *mgr,
+                                      const OfflinePunctuationConfig &config)
+      : config_(config), model_(mgr, config.model) {}
+#endif
+
   std::string AddPunctuation(const std::string &text) const override {
     if (text.empty()) {
       return {};
diff --git a/sherpa-onnx/csrc/offline-punctuation-impl.cc b/sherpa-onnx/csrc/offline-punctuation-impl.cc
index 2eefdae3..ed943fcc 100644
--- a/sherpa-onnx/csrc/offline-punctuation-impl.cc
+++ b/sherpa-onnx/csrc/offline-punctuation-impl.cc
@@ -4,6 +4,11 @@
 
 #include "sherpa-onnx/csrc/offline-punctuation-impl.h"
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/macros.h"
 #include "sherpa-onnx/csrc/offline-punctuation-ct-transformer-impl.h"
 
@@ -19,4 +24,16 @@ std::unique_ptr<OfflinePunctuationImpl> OfflinePunctuationImpl::Create(
   return nullptr;
 }
 
+#if __ANDROID_API__ >= 9
+std::unique_ptr<OfflinePunctuationImpl> OfflinePunctuationImpl::Create(
+    AAssetManager *mgr, const OfflinePunctuationConfig &config) {
+  if (!config.model.ct_transformer.empty()) {
+    return std::make_unique<OfflinePunctuationCtTransformerImpl>(mgr, config);
+  }
+
+  SHERPA_ONNX_LOGE("Please specify a punctuation model! Return a null pointer");
+  return nullptr;
+}
+#endif
+
 }  // namespace sherpa_onnx
diff --git a/sherpa-onnx/csrc/offline-punctuation-impl.h b/sherpa-onnx/csrc/offline-punctuation-impl.h
index 7e1c1c1b..d0538aab 100644
--- a/sherpa-onnx/csrc/offline-punctuation-impl.h
+++ b/sherpa-onnx/csrc/offline-punctuation-impl.h
@@ -7,6 +7,10 @@
 #include <memory>
 #include <string>
 #include <vector>
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
 
 #include "sherpa-onnx/csrc/offline-punctuation.h"
 
@@ -19,6 +23,11 @@ class OfflinePunctuationImpl {
   static std::unique_ptr<OfflinePunctuationImpl> Create(
       const OfflinePunctuationConfig &config);
 
+#if __ANDROID_API__ >= 9
+  static std::unique_ptr<OfflinePunctuationImpl> Create(
+      AAssetManager *mgr, const OfflinePunctuationConfig &config);
+#endif
+
   virtual std::string AddPunctuation(const std::string &text) const = 0;
 };
 
diff --git a/sherpa-onnx/csrc/offline-punctuation.cc b/sherpa-onnx/csrc/offline-punctuation.cc
index 292156ab..140e7203 100644
--- a/sherpa-onnx/csrc/offline-punctuation.cc
+++ b/sherpa-onnx/csrc/offline-punctuation.cc
@@ -4,6 +4,11 @@
 
 #include "sherpa-onnx/csrc/offline-punctuation.h"
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/macros.h"
 #include "sherpa-onnx/csrc/offline-punctuation-impl.h"
 
@@ -33,6 +38,12 @@ std::string OfflinePunctuationConfig::ToString() const {
 OfflinePunctuation::OfflinePunctuation(const OfflinePunctuationConfig &config)
     : impl_(OfflinePunctuationImpl::Create(config)) {}
 
+#if __ANDROID_API__ >= 9
+OfflinePunctuation::OfflinePunctuation(AAssetManager *mgr,
+                                       const OfflinePunctuationConfig &config)
+    : impl_(OfflinePunctuationImpl::Create(mgr, config)) {}
+#endif
+
 OfflinePunctuation::~OfflinePunctuation() = default;
 
 std::string OfflinePunctuation::AddPunctuation(const std::string &text) const {
diff --git a/sherpa-onnx/csrc/offline-punctuation.h b/sherpa-onnx/csrc/offline-punctuation.h
index 7be31e41..831e7cc9 100644
--- a/sherpa-onnx/csrc/offline-punctuation.h
+++ b/sherpa-onnx/csrc/offline-punctuation.h
@@ -8,6 +8,11 @@
 #include <string>
 #include <vector>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/offline-punctuation-model-config.h"
 #include "sherpa-onnx/csrc/parse-options.h"
 
@@ -33,6 +38,11 @@ class OfflinePunctuation {
  public:
   explicit OfflinePunctuation(const OfflinePunctuationConfig &config);
 
+#if __ANDROID_API__ >= 9
+  OfflinePunctuation(AAssetManager *mgr,
+                     const OfflinePunctuationConfig &config);
+#endif
+
   ~OfflinePunctuation();
 
   // Add punctuation to the input text and return it.
diff --git a/sherpa-onnx/java-api/Makefile b/sherpa-onnx/java-api/Makefile
index 67cedde4..3920f20c 100644
--- a/sherpa-onnx/java-api/Makefile
+++ b/sherpa-onnx/java-api/Makefile
@@ -40,6 +40,10 @@ java_files += SpokenLanguageIdentificationWhisperConfig.java
 java_files += SpokenLanguageIdentificationConfig.java
 java_files += SpokenLanguageIdentification.java
 
+java_files += OfflinePunctuationModelConfig.java
+java_files += OfflinePunctuationConfig.java
+java_files += OfflinePunctuation.java
+
 class_files := $(java_files:%.java=%.class)
 
 java_files := $(addprefix src/$(package_dir)/,$(java_files))
diff --git a/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuation.java b/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuation.java
new file mode 100644
index 00000000..4a3f1d7b
--- /dev/null
+++ b/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuation.java
@@ -0,0 +1,39 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class OfflinePunctuation {
+    static {
+        System.loadLibrary("sherpa-onnx-jni");
+    }
+
+    private long ptr = 0; // this is the asr engine ptrss
+
+    public OfflinePunctuation(OfflinePunctuationConfig config) {
+        ptr = newFromFile(config);
+    }
+
+    public String addPunctuation(String text) {
+        return addPunctuation(ptr, text);
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        release();
+    }
+
+    // You'd better call it manually if it is not used anymore
+    public void release() {
+        if (this.ptr == 0) {
+            return;
+        }
+        delete(this.ptr);
+        this.ptr = 0;
+    }
+
+    private native void delete(long ptr);
+
+    private native long newFromFile(OfflinePunctuationConfig config);
+
+    private native String addPunctuation(long ptr, String text);
+}
diff --git a/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuationConfig.java b/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuationConfig.java
new file mode 100644
index 00000000..643bd49e
--- /dev/null
+++ b/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuationConfig.java
@@ -0,0 +1,33 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class OfflinePunctuationConfig {
+    private final OfflinePunctuationModelConfig model;
+
+    private OfflinePunctuationConfig(Builder builder) {
+        this.model = builder.model;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public OfflinePunctuationModelConfig getModel() {
+        return model;
+    }
+
+
+    public static class Builder {
+        private OfflinePunctuationModelConfig model = OfflinePunctuationModelConfig.builder().build();
+
+        public OfflinePunctuationConfig build() {
+            return new OfflinePunctuationConfig(this);
+        }
+
+        public Builder setModel(OfflinePunctuationModelConfig model) {
+            this.model = model;
+            return this;
+        }
+    }
+}
diff --git a/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuationModelConfig.java b/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuationModelConfig.java
new file mode 100644
index 00000000..3c8d0a8d
--- /dev/null
+++ b/sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/OfflinePunctuationModelConfig.java
@@ -0,0 +1,56 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class OfflinePunctuationModelConfig {
+    private final String ctTransformer;
+    private final int numThreads;
+    private final boolean debug;
+    private final String provider;
+
+    private OfflinePunctuationModelConfig(Builder builder) {
+        this.ctTransformer = builder.ctTransformer;
+        this.numThreads = builder.numThreads;
+        this.debug = builder.debug;
+        this.provider = builder.provider;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public String getCtTransformer() {
+        return ctTransformer;
+    }
+
+    public static class Builder {
+        private String ctTransformer = "";
+        private int numThreads = 1;
+        private boolean debug = true;
+        private String provider = "cpu";
+
+        public OfflinePunctuationModelConfig build() {
+            return new OfflinePunctuationModelConfig(this);
+        }
+
+        public Builder setCtTransformer(String ctTransformer) {
+            this.ctTransformer = ctTransformer;
+            return this;
+        }
+
+        public Builder setNumThreads(int numThreads) {
+            this.numThreads = numThreads;
+            return this;
+        }
+
+        public Builder setDebug(boolean debug) {
+            this.debug = debug;
+            return this;
+        }
+
+        public Builder setProvider(String provider) {
+            this.provider = provider;
+            return this;
+        }
+    }
+}
diff --git a/sherpa-onnx/jni/CMakeLists.txt b/sherpa-onnx/jni/CMakeLists.txt
index ae3180c5..b44c4135 100644
--- a/sherpa-onnx/jni/CMakeLists.txt
+++ b/sherpa-onnx/jni/CMakeLists.txt
@@ -13,6 +13,7 @@ set(sources
   audio-tagging.cc
   jni.cc
   keyword-spotter.cc
+  offline-punctuation.cc
   offline-recognizer.cc
   offline-stream.cc
   online-recognizer.cc
diff --git a/sherpa-onnx/jni/offline-punctuation.cc b/sherpa-onnx/jni/offline-punctuation.cc
new file mode 100644
index 00000000..20b9974e
--- /dev/null
+++ b/sherpa-onnx/jni/offline-punctuation.cc
@@ -0,0 +1,108 @@
+// sherpa-onnx/jni/offline-punctuation.cc
+//
+// Copyright (c)  2024  Xiaomi Corporation
+
+#include "sherpa-onnx/csrc/offline-punctuation.h"
+
+#include "sherpa-onnx/csrc/macros.h"
+#include "sherpa-onnx/jni/common.h"
+
+namespace sherpa_onnx {
+
+static OfflinePunctuationConfig GetOfflinePunctuationConfig(JNIEnv *env,
+                                                            jobject config) {
+  OfflinePunctuationConfig ans;
+
+  jclass cls = env->GetObjectClass(config);
+  jfieldID fid;
+
+  fid = env->GetFieldID(
+      cls, "model", "Lcom/k2fsa/sherpa/onnx/OfflinePunctuationModelConfig;");
+  jobject model_config = env->GetObjectField(config, fid);
+  jclass model_config_cls = env->GetObjectClass(model_config);
+
+  fid =
+      env->GetFieldID(model_config_cls, "ctTransformer", "Ljava/lang/String;");
+  jstring s = (jstring)env->GetObjectField(model_config, fid);
+  const char *p = env->GetStringUTFChars(s, nullptr);
+  ans.model.ct_transformer = p;
+  env->ReleaseStringUTFChars(s, p);
+
+  fid = env->GetFieldID(model_config_cls, "numThreads", "I");
+  ans.model.num_threads = env->GetIntField(model_config, fid);
+
+  fid = env->GetFieldID(model_config_cls, "debug", "Z");
+  ans.model.debug = env->GetBooleanField(model_config, fid);
+
+  fid = env->GetFieldID(model_config_cls, "provider", "Ljava/lang/String;");
+  s = (jstring)env->GetObjectField(model_config, fid);
+  p = env->GetStringUTFChars(s, nullptr);
+  ans.model.provider = p;
+  env->ReleaseStringUTFChars(s, p);
+
+  return ans;
+}
+
+}  // namespace sherpa_onnx
+
+SHERPA_ONNX_EXTERN_C
+JNIEXPORT jlong JNICALL
+Java_com_k2fsa_sherpa_onnx_OfflinePunctuation_newFromAsset(
+    JNIEnv *env, jobject /*obj*/, jobject asset_manager, jobject _config) {
+#if __ANDROID_API__ >= 9
+  AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
+  if (!mgr) {
+    SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+  }
+#endif
+  auto config = sherpa_onnx::GetOfflinePunctuationConfig(env, _config);
+  SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
+  auto model = new sherpa_onnx::OfflinePunctuation(
+#if __ANDROID_API__ >= 9
+      mgr,
+#endif
+      config);
+
+  return (jlong)model;
+}
+
+SHERPA_ONNX_EXTERN_C
+JNIEXPORT jlong JNICALL
+Java_com_k2fsa_sherpa_onnx_OfflinePunctuation_newFromFile(JNIEnv *env,
+                                                          jobject /*obj*/,
+                                                          jobject _config) {
+  auto config = sherpa_onnx::GetOfflinePunctuationConfig(env, _config);
+  SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
+
+  if (!config.Validate()) {
+    SHERPA_ONNX_LOGE("Errors found in config!");
+    return 0;
+  }
+
+  auto model = new sherpa_onnx::OfflinePunctuation(config);
+
+  return (jlong)model;
+}
+
+SHERPA_ONNX_EXTERN_C
+JNIEXPORT void JNICALL Java_com_k2fsa_sherpa_onnx_OfflinePunctuation_delete(
+    JNIEnv *env, jobject /*obj*/, jlong ptr) {
+  delete reinterpret_cast<sherpa_onnx::OfflinePunctuation *>(ptr);
+}
+
+SHERPA_ONNX_EXTERN_C
+JNIEXPORT jstring JNICALL
+Java_com_k2fsa_sherpa_onnx_OfflinePunctuation_addPunctuation(JNIEnv *env,
+                                                             jobject /*obj*/,
+                                                             jlong ptr,
+                                                             jstring text) {
+  auto punct = reinterpret_cast<const sherpa_onnx::OfflinePunctuation *>(ptr);
+
+  const char *ptext = env->GetStringUTFChars(text, nullptr);
+
+  std::string result = punct->AddPunctuation(ptext);
+
+  env->ReleaseStringUTFChars(text, ptext);
+
+  return env->NewStringUTF(result.c_str());
+}
diff --git a/sherpa-onnx/kotlin-api/OfflinePunctuation.kt b/sherpa-onnx/kotlin-api/OfflinePunctuation.kt
new file mode 100644
index 00000000..ec6aa08f
--- /dev/null
+++ b/sherpa-onnx/kotlin-api/OfflinePunctuation.kt
@@ -0,0 +1,57 @@
+package com.k2fsa.sherpa.onnx
+
+import android.content.res.AssetManager
+
+data class OfflinePunctuationModelConfig(
+    var ctTransformer: String,
+    var numThreads: Int = 1,
+    var debug: Boolean = false,
+    var provider: String = "cpu",
+)
+
+
+data class OfflinePunctuationConfig(
+    var model: OfflinePunctuationModelConfig,
+)
+
+class OfflinePunctuation(
+    assetManager: AssetManager? = null,
+    config: OfflinePunctuationConfig,
+) {
+    private val ptr: Long
+
+    init {
+        ptr = if (assetManager != null) {
+            newFromAsset(assetManager, config)
+        } else {
+            newFromFile(config)
+        }
+    }
+
+    protected fun finalize() {
+        delete(ptr)
+    }
+
+    fun release() = finalize()
+
+    fun addPunctuation(text: String) = addPunctuation(ptr, text)
+
+    private external fun delete(ptr: Long)
+
+    private external fun addPunctuation(ptr: Long, text: String): String
+
+    private external fun newFromAsset(
+        assetManager: AssetManager,
+        config: OfflinePunctuationConfig,
+    ): Long
+
+    private external fun newFromFile(
+        config: OfflinePunctuationConfig,
+    ): Long
+
+    companion object {
+        init {
+            System.loadLibrary("sherpa-onnx-jni")
+        }
+    }
+}