diff --git a/CHANGELOG.md b/CHANGELOG.md
index 415c12f2..8202ec62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -72,6 +72,7 @@
 - Dev: Added snapshot tests for EventSub. (#5965)
 - Dev: Updated crashpad. (#6026)
 - Dev: Removed dead code and some MSVC warnings. (#6024)
+- Dev: Added check if WEBP is supported. (#6073)
 
 ## 2.5.2
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 20757791..36242321 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -539,6 +539,8 @@ set(SOURCE_FILES
         util/RenameThread.hpp
         util/SampleData.cpp
         util/SampleData.hpp
+        util/SelfCheck.cpp
+        util/SelfCheck.hpp
         util/SharedPtrElementLess.hpp
         util/SignalListener.hpp
         util/StreamLink.cpp
diff --git a/src/RunGui.cpp b/src/RunGui.cpp
index 3c820732..10a38015 100644
--- a/src/RunGui.cpp
+++ b/src/RunGui.cpp
@@ -11,6 +11,7 @@
 #include "singletons/Settings.hpp"
 #include "singletons/Updates.hpp"
 #include "util/CombinePath.hpp"
+#include "util/SelfCheck.hpp"
 #include "util/UnixSignalHandler.hpp"
 #include "widgets/dialogs/LastRunCrashDialog.hpp"
 
@@ -257,6 +258,8 @@ void runGui(QApplication &a, const Paths &paths, Settings &settings,
     }
 #endif
 
+    selfcheck::checkWebp();
+
     updates.deleteOldFiles();
 
     // Clear the cache 1 minute after start.
diff --git a/src/util/SelfCheck.cpp b/src/util/SelfCheck.cpp
new file mode 100644
index 00000000..c18df769
--- /dev/null
+++ b/src/util/SelfCheck.cpp
@@ -0,0 +1,70 @@
+#include "util/SelfCheck.hpp"
+
+#include "common/Literals.hpp"
+
+#include <QBuffer>
+#include <QImageReader>
+#include <QMessageBox>
+#include <QMimeDatabase>
+#include <QStringBuilder>
+#include <QStringList>
+
+namespace {
+
+using namespace chatterino::literals;
+
+// lossy image from https://developers.google.com/speed/webp/faq#in_your_own_javascript
+const QByteArray WEBP_IMAGE =
+    "RIFF\x22\0\0\0WEBPVP8\x20\x16\0\0\0\x30\x01\0\x9d\x01\x2a\x01\0\x01\0\x0e\xc0\xfe\x25\xa4\0\x03p\0\0\0\0"_ba;
+
+}  // namespace
+
+namespace chatterino::selfcheck {
+
+void checkWebp()
+{
+    QStringList messages;
+    QMimeDatabase mimeDb;
+
+    auto mime = mimeDb.mimeTypeForData(WEBP_IMAGE);
+    if (!mime.inherits("image/webp"))
+    {
+        messages.emplace_back(u"Failed to determine MIME type for WEBP image - "
+                              u"detected MIME type: \"" %
+                              mime.name() % '"');
+    }
+
+    QBuffer buffer;
+    buffer.setData(WEBP_IMAGE);
+    QImageReader reader(&buffer);
+
+    if (reader.canRead())
+    {
+        if (reader.imageCount() != 1)
+        {
+            messages.emplace_back(u"Minimal WEBP image doesn't have one (1) "
+                                  u"expected image - got: " %
+                                  QString::number(reader.imageCount()) %
+                                  u" - error: " % reader.errorString());
+        }
+        reader.read();
+    }
+    else
+    {
+        messages.emplace_back(
+            u"Minimal WEBP image can't be read - QImageReader::canRead "
+            u"returned false - error: \"" %
+            reader.errorString() % '"');
+    }
+
+    if (!messages.empty())
+    {
+        QMessageBox::warning(
+            nullptr, u"Chatterino - Sanity Check"_s,
+            u"Your Chatterino instance is not able to load WEBP files.\nMake "
+            u"sure you have qtimageformats installed.\n\n" %
+                messages.join(u"\n\n"));
+    }
+}
+
+}  // namespace chatterino::selfcheck
diff --git a/src/util/SelfCheck.hpp b/src/util/SelfCheck.hpp
new file mode 100644
index 00000000..09ddf458
--- /dev/null
+++ b/src/util/SelfCheck.hpp
@@ -0,0 +1,8 @@
+#pragma once
+
+namespace chatterino::selfcheck {
+
+/// Checks if WEBPs can be loaded
+void checkWebp();
+
+}  // namespace chatterino::selfcheck