diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/downloader/Downloader.java b/extractor/src/main/java/org/schabi/newpipe/extractor/downloader/Downloader.java
index 8e3b137de..aa7987156 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/downloader/Downloader.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/downloader/Downloader.java
@@ -7,6 +7,8 @@ import org.schabi.newpipe.extractor.localization.Localization;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -39,7 +41,7 @@ public abstract class Downloader {
      * @param localization the source of the value of the {@code Accept-Language} header
      * @return the result of the GET request
      */
-    public Response get(final String url, @Nullable final Localization localization)
+    public Response get(final String url, final Localization localization)
             throws IOException, ReCaptchaException {
         return get(url, null, localization);
     }
@@ -70,7 +72,7 @@ public abstract class Downloader {
      */
     public Response get(final String url,
                         @Nullable final Map<String, List<String>> headers,
-                        @Nullable final Localization localization)
+                        final Localization localization)
             throws IOException, ReCaptchaException {
         return execute(Request.newBuilder()
                 .get(url)
@@ -136,7 +138,7 @@ public abstract class Downloader {
     public Response post(final String url,
                          @Nullable final Map<String, List<String>> headers,
                          @Nullable final byte[] dataToSend,
-                         @Nullable final Localization localization)
+                         final Localization localization)
             throws IOException, ReCaptchaException {
         return execute(Request.newBuilder()
                 .post(url, dataToSend)
@@ -145,6 +147,95 @@ public abstract class Downloader {
                 .build());
     }
 
+    /**
+     * Convenient method to send a POST request using the specified value of the
+     * {@code Content-Type} header with a given {@link Localization}.
+     *
+     * @param url          the URL that is pointing to the wanted resource
+     * @param headers      a list of headers that will be used in the request.
+     *                     Any default headers <b>should</b> be overridden by these.
+     * @param dataToSend   byte array that will be sent when doing the request.
+     * @param localization the source of the value of the {@code Accept-Language} header
+     * @param contentType  the mime type of the body sent, which will be set as the value of the
+     *                     {@code Content-Type} header
+     * @return the result of the POST request
+     * @see #post(String, Map, byte[], Localization)
+     */
+    public Response postWithContentType(final String url,
+                                        @Nullable final Map<String, List<String>> headers,
+                                        @Nullable final byte[] dataToSend,
+                                        final Localization localization,
+                                        final String contentType)
+            throws IOException, ReCaptchaException {
+        final Map<String, List<String>> actualHeaders = new HashMap<>();
+        if (headers != null) {
+            actualHeaders.putAll(headers);
+        }
+        actualHeaders.put("Content-Type", Collections.singletonList(contentType));
+        return post(url, actualHeaders, dataToSend, localization);
+    }
+
+    /**
+     * Convenient method to send a POST request using the specified value of the
+     * {@code Content-Type} header.
+     *
+     * @param url         the URL that is pointing to the wanted resource
+     * @param headers     a list of headers that will be used in the request.
+     *                    Any default headers <b>should</b> be overridden by these.
+     * @param dataToSend  byte array that will be sent when doing the request.
+     * @param contentType the mime type of the body sent, which will be set as the value of the
+     *                    {@code Content-Type} header
+     * @return the result of the POST request
+     * @see #post(String, Map, byte[], Localization)
+     */
+    public Response postWithContentType(final String url,
+                                        @Nullable final Map<String, List<String>> headers,
+                                        @Nullable final byte[] dataToSend,
+                                        final String contentType)
+            throws IOException, ReCaptchaException {
+        return postWithContentType(url, headers, dataToSend, NewPipe.getPreferredLocalization(),
+                contentType);
+    }
+
+    /**
+     * Convenient method to send a POST request the JSON mime type as the value of the
+     * {@code Content-Type} header with a given {@link Localization}.
+     *
+     * @param url          the URL that is pointing to the wanted resource
+     * @param headers      a list of headers that will be used in the request.
+     *                     Any default headers <b>should</b> be overridden by these.
+     * @param dataToSend   byte array that will be sent when doing the request.
+     * @param localization the source of the value of the {@code Accept-Language} header
+     * @return the result of the POST request
+     * @see #post(String, Map, byte[], Localization)
+     */
+    public Response postWithContentTypeJson(final String url,
+                                            @Nullable final Map<String, List<String>> headers,
+                                            @Nullable final byte[] dataToSend,
+                                            final Localization localization)
+            throws IOException, ReCaptchaException {
+        return postWithContentType(url, headers, dataToSend, localization, "application/json");
+    }
+
+    /**
+     * Convenient method to send a POST request the JSON mime type as the value of the
+     * {@code Content-Type} header.
+     *
+     * @param url         the URL that is pointing to the wanted resource
+     * @param headers     a list of headers that will be used in the request.
+     *                    Any default headers <b>should</b> be overridden by these.
+     * @param dataToSend  byte array that will be sent when doing the request.
+     * @return the result of the POST request
+     * @see #post(String, Map, byte[], Localization)
+     */
+    public Response postWithContentTypeJson(final String url,
+                                            @Nullable final Map<String, List<String>> headers,
+                                            @Nullable final byte[] dataToSend)
+            throws IOException, ReCaptchaException {
+        return postWithContentTypeJson(url, headers, dataToSend,
+                NewPipe.getPreferredLocalization());
+    }
+
     /**
      * Do a request using the specified {@link Request} object.
      *