diff --git a/libraries/common/src/main/java/androidx/media3/common/util/Util.java b/libraries/common/src/main/java/androidx/media3/common/util/Util.java
index d2936003ee..12f9388982 100644
--- a/libraries/common/src/main/java/androidx/media3/common/util/Util.java
+++ b/libraries/common/src/main/java/androidx/media3/common/util/Util.java
@@ -92,8 +92,10 @@ import androidx.media3.common.Player.Commands;
 import androidx.media3.common.audio.AudioProcessor;
 import com.google.common.base.Ascii;
 import com.google.common.base.Charsets;
+import com.google.common.io.ByteStreams;
 import com.google.common.math.DoubleMath;
 import com.google.common.math.LongMath;
+import com.google.common.primitives.Ints;
 import com.google.common.primitives.UnsignedBytes;
 import com.google.common.util.concurrent.AsyncFunction;
 import com.google.common.util.concurrent.Futures;
@@ -203,47 +205,30 @@ public final class Util {
   private Util() {}
 
   /**
-   * Converts the entirety of an {@link InputStream} to a byte array.
-   *
-   * @param inputStream the {@link InputStream} to be read. The input stream is not closed by this
-   *     method.
-   * @return a byte array containing all of the inputStream's bytes.
-   * @throws IOException if an error occurs reading from the stream.
+   * @deprecated Use Guava's {@link ByteStreams#toByteArray(InputStream)} instead.
    */
   @UnstableApi
+  @Deprecated
   public static byte[] toByteArray(InputStream inputStream) throws IOException {
-    byte[] buffer = new byte[1024 * 4];
-    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
-    int bytesRead;
-    while ((bytesRead = inputStream.read(buffer)) != -1) {
-      outputStream.write(buffer, 0, bytesRead);
-    }
-    return outputStream.toByteArray();
-  }
-
-  /** Converts an integer into an equivalent byte array. */
-  @UnstableApi
-  public static byte[] toByteArray(int value) {
-    return new byte[] {
-      (byte) (value >> 24), (byte) (value >> 16), (byte) (value >> 8), (byte) value
-    };
+    return ByteStreams.toByteArray(inputStream);
   }
 
   /**
    * Converts an array of integers into an equivalent byte array.
    *
    * <p>Each integer is converted into 4 sequential bytes.
+   *
+   * <p>For a single integer, prefer Guava's {@link Ints#toByteArray(int)} implementation.
    */
   @UnstableApi
   public static byte[] toByteArray(int... values) {
     byte[] array = new byte[values.length * 4];
     int index = 0;
     for (int value : values) {
-      byte[] byteArray = toByteArray(value);
-      array[index++] = byteArray[0];
-      array[index++] = byteArray[1];
-      array[index++] = byteArray[2];
-      array[index++] = byteArray[3];
+      array[index++] = (byte) (value >> 24);
+      array[index++] = (byte) (value >> 16);
+      array[index++] = (byte) (value >> 8);
+      array[index++] = (byte) (value);
     }
     return array;
   }
@@ -251,23 +236,7 @@ public final class Util {
   /** Converts a float into an equivalent byte array. */
   @UnstableApi
   public static byte[] toByteArray(float value) {
-    return toByteArray(Float.floatToIntBits(value));
-  }
-
-  /** Converts a byte array into a float. */
-  @UnstableApi
-  public static float toFloat(byte[] bytes) {
-    checkArgument(bytes.length == 4);
-    int intBits =
-        bytes[0] << 24 | (bytes[1] & 0xFF) << 16 | (bytes[2] & 0xFF) << 8 | (bytes[3] & 0xFF);
-    return Float.intBitsToFloat(intBits);
-  }
-
-  /** Converts a byte array into an integer. */
-  @UnstableApi
-  public static int toInteger(byte[] bytes) {
-    checkArgument(bytes.length == 4);
-    return bytes[0] << 24 | bytes[1] << 16 | bytes[2] << 8 | bytes[3];
+    return Ints.toByteArray(Float.floatToIntBits(value));
   }
 
   /**
@@ -1060,7 +1029,7 @@ public final class Util {
     @Nullable InputStream inputStream = null;
     try {
       inputStream = context.getAssets().open(assetPath);
-      return Util.fromUtf8Bytes(Util.toByteArray(inputStream));
+      return Util.fromUtf8Bytes(ByteStreams.toByteArray(inputStream));
     } finally {
       Util.closeQuietly(inputStream);
     }
diff --git a/libraries/container/src/main/java/androidx/media3/container/MdtaMetadataEntry.java b/libraries/container/src/main/java/androidx/media3/container/MdtaMetadataEntry.java
index 93c47fc7f6..40c223624b 100644
--- a/libraries/container/src/main/java/androidx/media3/container/MdtaMetadataEntry.java
+++ b/libraries/container/src/main/java/androidx/media3/container/MdtaMetadataEntry.java
@@ -21,6 +21,7 @@ import androidx.annotation.Nullable;
 import androidx.media3.common.Metadata;
 import androidx.media3.common.util.UnstableApi;
 import androidx.media3.common.util.Util;
+import com.google.common.primitives.Ints;
 import java.util.Arrays;
 
 /**
@@ -113,10 +114,10 @@ public final class MdtaMetadataEntry implements Metadata.Entry {
         formattedValue = Util.fromUtf8Bytes(value);
         break;
       case TYPE_INDICATOR_FLOAT32:
-        formattedValue = String.valueOf(Util.toFloat(value));
+        formattedValue = String.valueOf(Float.intBitsToFloat(Ints.fromByteArray(value)));
         break;
       case TYPE_INDICATOR_INT32:
-        formattedValue = String.valueOf(Util.toInteger(value));
+        formattedValue = String.valueOf(Ints.fromByteArray(value));
         break;
       default:
         formattedValue = Util.toHexString(value);
diff --git a/libraries/datasource/src/main/java/androidx/media3/datasource/DefaultHttpDataSource.java b/libraries/datasource/src/main/java/androidx/media3/datasource/DefaultHttpDataSource.java
index 6a9a1d8af5..c43e6ddd25 100644
--- a/libraries/datasource/src/main/java/androidx/media3/datasource/DefaultHttpDataSource.java
+++ b/libraries/datasource/src/main/java/androidx/media3/datasource/DefaultHttpDataSource.java
@@ -33,6 +33,7 @@ import com.google.common.base.Predicate;
 import com.google.common.collect.ForwardingMap;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Sets;
+import com.google.common.io.ByteStreams;
 import com.google.common.net.HttpHeaders;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.io.IOException;
@@ -423,7 +424,7 @@ public class DefaultHttpDataSource extends BaseDataSource implements HttpDataSou
       byte[] errorResponseBody;
       try {
         errorResponseBody =
-            errorStream != null ? Util.toByteArray(errorStream) : Util.EMPTY_BYTE_ARRAY;
+            errorStream != null ? ByteStreams.toByteArray(errorStream) : Util.EMPTY_BYTE_ARRAY;
       } catch (IOException e) {
         errorResponseBody = Util.EMPTY_BYTE_ARRAY;
       }
diff --git a/libraries/datasource/src/test/java/androidx/media3/datasource/cache/SimpleCacheTest.java b/libraries/datasource/src/test/java/androidx/media3/datasource/cache/SimpleCacheTest.java
index 758921e2d3..38e1d441a5 100644
--- a/libraries/datasource/src/test/java/androidx/media3/datasource/cache/SimpleCacheTest.java
+++ b/libraries/datasource/src/test/java/androidx/media3/datasource/cache/SimpleCacheTest.java
@@ -16,7 +16,6 @@
 package androidx.media3.datasource.cache;
 
 import static androidx.media3.common.C.LENGTH_UNSET;
-import static androidx.media3.common.util.Util.toByteArray;
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertThrows;
 import static org.mockito.Mockito.doAnswer;
@@ -28,6 +27,7 @@ import androidx.media3.datasource.cache.Cache.CacheException;
 import androidx.media3.test.utils.TestUtil;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
+import com.google.common.io.ByteStreams;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
@@ -646,7 +646,7 @@ public class SimpleCacheTest {
     assertThat(cacheSpan.isCached).isTrue();
     byte[] expected = generateData(cacheSpan.key, (int) cacheSpan.position, (int) cacheSpan.length);
     try (FileInputStream inputStream = new FileInputStream(cacheSpan.file)) {
-      assertThat(toByteArray(inputStream)).isEqualTo(expected);
+      assertThat(ByteStreams.toByteArray(inputStream)).isEqualTo(expected);
     }
   }
 
diff --git a/libraries/datasource_okhttp/src/main/java/androidx/media3/datasource/okhttp/OkHttpDataSource.java b/libraries/datasource_okhttp/src/main/java/androidx/media3/datasource/okhttp/OkHttpDataSource.java
index e360989db8..c72796405d 100644
--- a/libraries/datasource_okhttp/src/main/java/androidx/media3/datasource/okhttp/OkHttpDataSource.java
+++ b/libraries/datasource_okhttp/src/main/java/androidx/media3/datasource/okhttp/OkHttpDataSource.java
@@ -32,12 +32,10 @@ import androidx.media3.datasource.DataSource;
 import androidx.media3.datasource.DataSourceException;
 import androidx.media3.datasource.DataSpec;
 import androidx.media3.datasource.HttpDataSource;
-import androidx.media3.datasource.HttpDataSource.HttpDataSourceException;
-import androidx.media3.datasource.HttpDataSource.InvalidContentTypeException;
-import androidx.media3.datasource.HttpDataSource.InvalidResponseCodeException;
 import androidx.media3.datasource.HttpUtil;
 import androidx.media3.datasource.TransferListener;
 import com.google.common.base.Predicate;
+import com.google.common.io.ByteStreams;
 import com.google.common.net.HttpHeaders;
 import com.google.common.util.concurrent.SettableFuture;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
@@ -338,7 +336,7 @@ public class OkHttpDataSource extends BaseDataSource implements HttpDataSource {
 
       byte[] errorResponseBody;
       try {
-        errorResponseBody = Util.toByteArray(Assertions.checkNotNull(responseByteStream));
+        errorResponseBody = ByteStreams.toByteArray(Assertions.checkNotNull(responseByteStream));
       } catch (IOException e) {
         errorResponseBody = Util.EMPTY_BYTE_ARRAY;
       }
diff --git a/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/HttpMediaDrmCallback.java b/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/HttpMediaDrmCallback.java
index 95eb55e4d6..8973607d02 100644
--- a/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/HttpMediaDrmCallback.java
+++ b/libraries/exoplayer/src/main/java/androidx/media3/exoplayer/drm/HttpMediaDrmCallback.java
@@ -30,6 +30,7 @@ import androidx.media3.datasource.StatsDataSource;
 import androidx.media3.exoplayer.drm.ExoMediaDrm.KeyRequest;
 import androidx.media3.exoplayer.drm.ExoMediaDrm.ProvisionRequest;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.io.ByteStreams;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
@@ -182,7 +183,7 @@ public final class HttpMediaDrmCallback implements MediaDrmCallback {
       while (true) {
         DataSourceInputStream inputStream = new DataSourceInputStream(dataSource, dataSpec);
         try {
-          return Util.toByteArray(inputStream);
+          return ByteStreams.toByteArray(inputStream);
         } catch (InvalidResponseCodeException e) {
           @Nullable String redirectUrl = getRedirectUrl(e, manualRedirectCount);
           if (redirectUrl == null) {
diff --git a/libraries/exoplayer/src/test/java/androidx/media3/exoplayer/MetadataRetrieverTest.java b/libraries/exoplayer/src/test/java/androidx/media3/exoplayer/MetadataRetrieverTest.java
index 4654c30b45..a41c383e49 100644
--- a/libraries/exoplayer/src/test/java/androidx/media3/exoplayer/MetadataRetrieverTest.java
+++ b/libraries/exoplayer/src/test/java/androidx/media3/exoplayer/MetadataRetrieverTest.java
@@ -40,6 +40,7 @@ import androidx.media3.test.utils.FakeClock;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.common.collect.ImmutableList;
+import com.google.common.primitives.Ints;
 import com.google.common.util.concurrent.ListenableFuture;
 import java.util.ArrayList;
 import java.util.List;
@@ -166,7 +167,7 @@ public class MetadataRetrieverTest {
     MdtaMetadataEntry expectedTemporalLayersCountMetdata =
         new MdtaMetadataEntry(
             /* key= */ "com.android.video.temporal_layers_count",
-            /* value= */ Util.toByteArray(4),
+            /* value= */ Ints.toByteArray(4),
             MdtaMetadataEntry.TYPE_INDICATOR_INT32);
     SmtaMetadataEntry expectedSmtaEntry =
         new SmtaMetadataEntry(/* captureFrameRate= */ 240, /* svcTemporalLayerCount= */ 4);
diff --git a/libraries/test_utils/src/main/java/androidx/media3/test/utils/CacheAsserts.java b/libraries/test_utils/src/main/java/androidx/media3/test/utils/CacheAsserts.java
index 3f20d466ed..cf2b246906 100644
--- a/libraries/test_utils/src/main/java/androidx/media3/test/utils/CacheAsserts.java
+++ b/libraries/test_utils/src/main/java/androidx/media3/test/utils/CacheAsserts.java
@@ -21,7 +21,6 @@ import static com.google.common.truth.Truth.assertWithMessage;
 import android.net.Uri;
 import androidx.media3.common.util.Assertions;
 import androidx.media3.common.util.UnstableApi;
-import androidx.media3.common.util.Util;
 import androidx.media3.datasource.DataSource;
 import androidx.media3.datasource.DataSourceInputStream;
 import androidx.media3.datasource.DataSourceUtil;
@@ -30,6 +29,7 @@ import androidx.media3.datasource.PlaceholderDataSource;
 import androidx.media3.datasource.cache.Cache;
 import androidx.media3.datasource.cache.CacheDataSource;
 import androidx.media3.test.utils.FakeDataSet.FakeData;
+import com.google.common.io.ByteStreams;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -158,7 +158,7 @@ public final class CacheAsserts {
   public static void assertReadData(DataSource dataSource, DataSpec dataSpec, byte[] expected)
       throws IOException {
     try (DataSourceInputStream inputStream = new DataSourceInputStream(dataSource, dataSpec)) {
-      byte[] bytes = Util.toByteArray(inputStream);
+      byte[] bytes = ByteStreams.toByteArray(inputStream);
       assertThat(bytes).isEqualTo(expected);
     }
   }
diff --git a/libraries/test_utils/src/main/java/androidx/media3/test/utils/TestUtil.java b/libraries/test_utils/src/main/java/androidx/media3/test/utils/TestUtil.java
index 079438016e..57f4355537 100644
--- a/libraries/test_utils/src/main/java/androidx/media3/test/utils/TestUtil.java
+++ b/libraries/test_utils/src/main/java/androidx/media3/test/utils/TestUtil.java
@@ -36,7 +36,6 @@ import androidx.media3.common.MediaMetadata;
 import androidx.media3.common.StreamKey;
 import androidx.media3.common.Timeline;
 import androidx.media3.common.TrackGroup;
-import androidx.media3.common.util.Assertions;
 import androidx.media3.common.util.UnstableApi;
 import androidx.media3.common.util.Util;
 import androidx.media3.database.DatabaseProvider;
@@ -53,7 +52,9 @@ import androidx.media3.extractor.PositionHolder;
 import androidx.media3.extractor.SeekMap;
 import androidx.media3.extractor.metadata.MetadataInputBuffer;
 import com.google.common.collect.ImmutableList;
+import com.google.common.io.ByteStreams;
 import com.google.common.primitives.Bytes;
+import com.google.common.primitives.UnsignedBytes;
 import com.google.common.truth.Correspondence;
 import java.io.File;
 import java.io.FileInputStream;
@@ -140,8 +141,7 @@ public class TestUtil {
   public static byte[] createByteArray(int... bytes) {
     byte[] array = new byte[bytes.length];
     for (int i = 0; i < array.length; i++) {
-      Assertions.checkState(0x00 <= bytes[i] && bytes[i] <= 0xFF);
-      array[i] = (byte) bytes[i];
+      array[i] = UnsignedBytes.checkedCast(bytes[i]);
     }
     return array;
   }
@@ -202,14 +202,14 @@ public class TestUtil {
   /** Returns the bytes of an asset file. */
   public static byte[] getByteArray(Context context, String fileName) throws IOException {
     try (InputStream inputStream = getInputStream(context, fileName)) {
-      return Util.toByteArray(inputStream);
+      return ByteStreams.toByteArray(inputStream);
     }
   }
 
   /** Returns the bytes of a file using its file path. */
   public static byte[] getByteArrayFromFilePath(String filePath) throws IOException {
     try (InputStream inputStream = new FileInputStream(filePath)) {
-      return Util.toByteArray(inputStream);
+      return ByteStreams.toByteArray(inputStream);
     }
   }