diff --git a/doc/03-cli.md b/doc/03-cli.md
index 04a3db408..fb6d03bf2 100644
--- a/doc/03-cli.md
+++ b/doc/03-cli.md
@@ -413,6 +413,12 @@ Unlike update/install, this command will ignore config.platform settings and
 check the real platform packages so you can be certain you have the required
 platform dependencies.
 
+### Options
+
+* **--lock:** Checks requirements only from the lock file, not from installed packages.
+* **--no-dev:** Disables checking of require-dev packages requirements.
+* **--format (-f):** Format of the output: text (default) or json
+
 ## global
 
 The global command allows you to run other commands like `install`, `remove`, `require`
diff --git a/src/Composer/Command/CheckPlatformReqsCommand.php b/src/Composer/Command/CheckPlatformReqsCommand.php
index e8f13d5c9..d7108e91d 100644
--- a/src/Composer/Command/CheckPlatformReqsCommand.php
+++ b/src/Composer/Command/CheckPlatformReqsCommand.php
@@ -15,11 +15,12 @@ namespace Composer\Command;
 use Composer\Package\Link;
 use Composer\Semver\Constraint\Constraint;
 use Symfony\Component\Console\Input\InputInterface;
-use Symfony\Component\Console\Input\InputOption;
+use Composer\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
 use Composer\Repository\PlatformRepository;
 use Composer\Repository\RootPackageRepository;
 use Composer\Repository\InstalledRepository;
+use Composer\Json\JsonFile;
 
 class CheckPlatformReqsCommand extends BaseCommand
 {
@@ -33,6 +34,7 @@ class CheckPlatformReqsCommand extends BaseCommand
             ->setDefinition(array(
                 new InputOption('no-dev', null, InputOption::VALUE_NONE, 'Disables checking of require-dev packages requirements.'),
                 new InputOption('lock', null, InputOption::VALUE_NONE, 'Checks requirements only from the lock file, not from installed packages.'),
+                new InputOption('format', 'f', InputOption::VALUE_REQUIRED, 'Format of the output: text or json', 'text', ['json', 'text']),
             ))
             ->setHelp(
                 <<<EOT
@@ -127,7 +129,8 @@ EOT
                                     $candidate->getName() === $require ? $candidate->getPrettyName() : $require,
                                     $candidateConstraint->getPrettyString(),
                                     $link,
-                                    '<error>failed</error>'.($candidate->getName() === $require ? '' : ' <comment>provided by '.$candidate->getPrettyName().'</comment>'),
+                                    '<error>failed</error>',
+                                    $candidate->getName() === $require ? '' : '<comment>provided by '.$candidate->getPrettyName().'</comment>',
                                 );
 
                                 // skip to next candidate
@@ -139,7 +142,8 @@ EOT
                             $candidate->getName() === $require ? $candidate->getPrettyName() : $require,
                             $candidateConstraint->getPrettyString(),
                             null,
-                            '<info>success</info>'.($candidate->getName() === $require ? '' : ' <comment>provided by '.$candidate->getPrettyName().'</comment>'),
+                            '<info>success</info>',
+                            $candidate->getName() === $require ? '' : '<comment>provided by '.$candidate->getPrettyName().'</comment>',
                         );
 
                         // candidate matched, skip to next requirement
@@ -158,13 +162,14 @@ EOT
                     'n/a',
                     $links[0],
                     '<error>missing</error>',
+                    '',
                 );
 
                 $exitCode = max($exitCode, 2);
             }
         }
 
-        $this->printTable($output, $results);
+        $this->printTable($output, $results, $input->getOption('format'));
 
         return $exitCode;
     }
@@ -174,22 +179,43 @@ EOT
      *
      * @return void
      */
-    protected function printTable(OutputInterface $output, array $results): void
+    protected function printTable(OutputInterface $output, array $results, string $format): void
     {
         $rows = array();
         foreach ($results as $result) {
             /**
              * @var Link|null $link
              */
-            list($platformPackage, $version, $link, $status) = $result;
-            $rows[] = array(
-                $platformPackage,
-                $version,
-                $link ? sprintf('%s %s %s (%s)', $link->getSource(), $link->getDescription(), $link->getTarget(), $link->getPrettyConstraint()) : '',
-                $status,
-            );
+            list($platformPackage, $version, $link, $status, $provider) = $result;
+
+            if ('json' === $format) {
+                $rows[] = array(
+                    "name" => $platformPackage,
+                    "version" => $version,
+                    "status" => strip_tags($status),
+                    "failed_requirement" => $link instanceof Link ? [
+                        'source' => $link->getSource(),
+                        'type' => $link->getDescription(),
+                        'target' => $link->getTarget(),
+                        'constraint' => $link->getPrettyConstraint(),
+                    ] : null,
+                    "provider" => $provider === '' ? null : strip_tags($provider),
+                );
+            } else {
+                $rows[] = array(
+                    $platformPackage,
+                    $version,
+                    $link,
+                    $link ? sprintf('%s %s %s (%s)', $link->getSource(), $link->getDescription(), $link->getTarget(), $link->getPrettyConstraint()) : '',
+                    rtrim($status.' '.$provider),
+                );
+            }
         }
 
-        $this->renderTable($rows, $output);
+        if ('json' === $format) {
+            $this->getIO()->write(JsonFile::encode($rows));
+        } else {
+            $this->renderTable($rows, $output);
+        }
     }
 }