diff --git a/modules/juce_core/juce_core.cpp b/modules/juce_core/juce_core.cpp
index 0c9b604f24..fd1a760425 100644
--- a/modules/juce_core/juce_core.cpp
+++ b/modules/juce_core/juce_core.cpp
@@ -72,6 +72,16 @@
   #include <netinet/in.h>
  #endif
 
+ #if JUCE_WASM
+  #include <stdio.h>
+  #include <sys/types.h>
+  #include <sys/socket.h>
+  #include <errno.h>
+  #include <unistd.h>
+  #include <netinet/in.h>
+  #include <sys/stat.h>
+ #endif
+
  #if JUCE_LINUX
   #include <stdio.h>
   #include <langinfo.h>
@@ -92,7 +102,7 @@
  #include <net/if.h>
  #include <sys/ioctl.h>
 
- #if ! JUCE_ANDROID
+ #if ! (JUCE_ANDROID || JUCE_WASM)
   #include <execinfo.h>
  #endif
 #endif
@@ -230,14 +240,20 @@
  #include "native/juce_android_Threads.cpp"
  #include "native/juce_android_RuntimePermissions.cpp"
 
+#elif JUCE_WASM
+ #include "native/juce_wasm_SystemStats.cpp"
+
 #endif
 
-#include "threads/juce_ChildProcess.cpp"
 #include "threads/juce_HighResolutionTimer.cpp"
 #include "threads/juce_WaitableEvent.cpp"
 #include "network/juce_URL.cpp"
-#include "network/juce_WebInputStream.cpp"
-#include "streams/juce_URLInputSource.cpp"
+
+#if ! JUCE_WASM
+ #include "threads/juce_ChildProcess.cpp"
+ #include "network/juce_WebInputStream.cpp"
+ #include "streams/juce_URLInputSource.cpp"
+#endif
 
 //==============================================================================
 #if JUCE_UNIT_TESTS
diff --git a/modules/juce_core/native/juce_posix_IPAddress.h b/modules/juce_core/native/juce_posix_IPAddress.h
index 41c83cd374..797174619d 100644
--- a/modules/juce_core/native/juce_posix_IPAddress.h
+++ b/modules/juce_core/native/juce_posix_IPAddress.h
@@ -25,6 +25,18 @@ namespace juce
 
 namespace
 {
+    struct InterfaceInfo
+    {
+        IPAddress interfaceAddress, broadcastAddress;
+    };
+
+    inline bool operator== (const InterfaceInfo& lhs, const InterfaceInfo& rhs)
+    {
+        return lhs.interfaceAddress == rhs.interfaceAddress
+            && lhs.broadcastAddress == rhs.broadcastAddress;
+    }
+
+   #if ! JUCE_WASM
     static IPAddress makeAddress (const sockaddr_in6* addr_in)
     {
         if (addr_in == nullptr)
@@ -54,17 +66,6 @@ namespace
         return IPAddress (ntohl (addr_in->sin_addr.s_addr));
     }
 
-    struct InterfaceInfo
-    {
-        IPAddress interfaceAddress, broadcastAddress;
-    };
-
-    bool operator== (const InterfaceInfo& lhs, const InterfaceInfo& rhs)
-    {
-        return lhs.interfaceAddress == rhs.interfaceAddress
-            && lhs.broadcastAddress == rhs.broadcastAddress;
-    }
-
     bool populateInterfaceInfo (struct ifaddrs* ifa, InterfaceInfo& interfaceInfo)
     {
         if (ifa->ifa_addr != nullptr)
@@ -91,10 +92,15 @@ namespace
 
         return false;
     }
+   #endif
 
     Array<InterfaceInfo> getAllInterfaceInfo()
     {
         Array<InterfaceInfo> interfaces;
+
+       #if JUCE_WASM
+        // TODO
+       #else
         struct ifaddrs* ifaddr = nullptr;
 
         if (getifaddrs (&ifaddr) != -1)
@@ -109,6 +115,7 @@ namespace
 
             freeifaddrs (ifaddr);
         }
+       #endif
 
         return interfaces;
     }
diff --git a/modules/juce_core/native/juce_posix_NamedPipe.cpp b/modules/juce_core/native/juce_posix_NamedPipe.cpp
index e48ad25691..8b14f16d3a 100644
--- a/modules/juce_core/native/juce_posix_NamedPipe.cpp
+++ b/modules/juce_core/native/juce_posix_NamedPipe.cpp
@@ -23,6 +23,8 @@
 namespace juce
 {
 
+#if ! JUCE_WASM
+
 class NamedPipe::Pimpl
 {
 public:
@@ -241,4 +243,6 @@ int NamedPipe::write (const void* sourceBuffer, int numBytesToWrite, int timeOut
     return pimpl != nullptr ? pimpl->write (static_cast<const char*> (sourceBuffer), numBytesToWrite, timeOutMilliseconds) : -1;
 }
 
+#endif
+
 } // namespace juce
diff --git a/modules/juce_core/native/juce_posix_SharedCode.h b/modules/juce_core/native/juce_posix_SharedCode.h
index 5b76af7f6d..082a5697a6 100644
--- a/modules/juce_core/native/juce_posix_SharedCode.h
+++ b/modules/juce_core/native/juce_posix_SharedCode.h
@@ -130,16 +130,20 @@ bool File::setAsCurrentWorkingDirectory() const
     return chdir (getFullPathName().toUTF8()) == 0;
 }
 
-#if JUCE_ANDROID
- using juce_sigactionflags_type = unsigned long;
-#else
- using juce_sigactionflags_type = int;
-#endif
-
 //==============================================================================
 // The unix siginterrupt function is deprecated - this does the same job.
 int juce_siginterrupt (int sig, int flag)
 {
+   #if JUCE_WASM
+    ignoreUnused (sig, flag);
+    return 0;
+   #else
+    #if JUCE_ANDROID
+     using juce_sigactionflags_type = unsigned long;
+    #else
+     using juce_sigactionflags_type = int;
+    #endif
+
     struct ::sigaction act;
     (void) ::sigaction (sig, nullptr, &act);
 
@@ -149,6 +153,7 @@ int juce_siginterrupt (int sig, int flag)
         act.sa_flags |= static_cast<juce_sigactionflags_type> (SA_RESTART);
 
     return ::sigaction (sig, &act, nullptr);
+   #endif
 }
 
 //==============================================================================
@@ -168,6 +173,7 @@ namespace
                  && JUCE_STAT (fileName.toUTF8(), &info) == 0;
     }
 
+   #if ! JUCE_WASM
     // if this file doesn't exist, find a parent of it that does..
     bool juce_doStatFS (File f, struct statfs& result)
     {
@@ -205,6 +211,7 @@ namespace
         if (isReadOnly != nullptr)
             *isReadOnly = access (path.toUTF8(), W_OK) != 0;
     }
+   #endif
 
     Result getResultForErrno()
     {
@@ -329,6 +336,7 @@ void File::getFileTimesInternal (int64& modificationTime, int64& accessTime, int
 
 bool File::setFileTimesInternal (int64 modificationTime, int64 accessTime, int64 /*creationTime*/) const
 {
+   #if ! JUCE_WASM
     juce_statStruct info;
 
     if ((modificationTime != 0 || accessTime != 0) && juce_stat (fullPath, info))
@@ -360,6 +368,7 @@ bool File::setFileTimesInternal (int64 modificationTime, int64 accessTime, int64
         return utime (fullPath.toUTF8(), &times) == 0;
        #endif
     }
+   #endif
 
     return false;
 }
@@ -533,6 +542,7 @@ String SystemStats::getEnvironmentVariable (const String& name, const String& de
 }
 
 //==============================================================================
+#if ! JUCE_WASM
 void MemoryMappedFile::openInternal (const File& file, AccessMode mode, bool exclusive)
 {
     jassert (mode == readOnly || mode == readWrite);
@@ -659,6 +669,8 @@ int File::getVolumeSerialNumber() const
     return 0;
 }
 
+#endif
+
 //==============================================================================
 #if ! JUCE_IOS
 void juce_runSystemCommand (const String&);
@@ -1010,6 +1022,7 @@ void JUCE_CALLTYPE Thread::setCurrentThreadAffinityMask (uint32 affinityMask)
 }
 
 //==============================================================================
+#if ! JUCE_WASM
 bool DynamicLibrary::open (const String& name)
 {
     close();
@@ -1031,7 +1044,6 @@ void* DynamicLibrary::getFunction (const String& functionName) noexcept
     return handle != nullptr ? dlsym (handle, functionName.toUTF8()) : nullptr;
 }
 
-
 //==============================================================================
 #if JUCE_LINUX || JUCE_ANDROID
 static String readPosixConfigFileValue (const char* file, const char* key)
@@ -1221,6 +1233,8 @@ bool ChildProcess::start (const StringArray& args, int streamFlags)
     return activeProcess != nullptr;
 }
 
+#endif
+
 //==============================================================================
 struct HighResolutionTimer::Pimpl
 {
diff --git a/modules/juce_core/native/juce_wasm_SystemStats.cpp b/modules/juce_core/native/juce_wasm_SystemStats.cpp
new file mode 100644
index 0000000000..118f9d812a
--- /dev/null
+++ b/modules/juce_core/native/juce_wasm_SystemStats.cpp
@@ -0,0 +1,87 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2020 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   The code included in this file is provided under the terms of the ISC license
+   http://www.isc.org/downloads/software-support-policy/isc-license. Permission
+   To use, copy, modify, and/or distribute this software for any purpose with or
+   without fee is hereby granted provided that the above copyright notice and
+   this permission notice appear in all copies.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+void Logger::outputDebugString (const String& text)
+{
+    std::cerr << text << std::endl;
+}
+
+//==============================================================================
+SystemStats::OperatingSystemType SystemStats::getOperatingSystemType()  { return WASM; }
+String SystemStats::getOperatingSystemName()    { return "WASM"; }
+bool SystemStats::isOperatingSystem64Bit()      { return true; }
+String SystemStats::getDeviceDescription()      { return "Web-browser"; }
+String SystemStats::getDeviceManufacturer()     { return {}; }
+String SystemStats::getCpuVendor()              { return {}; }
+String SystemStats::getCpuModel()               { return {}; }
+int SystemStats::getCpuSpeedInMegahertz()       { return 0; }
+int SystemStats::getMemorySizeInMegabytes()     { return 0; }
+int SystemStats::getPageSize()                  { return 0; }
+String SystemStats::getLogonName()              { return {}; }
+String SystemStats::getFullUserName()           { return {}; }
+String SystemStats::getComputerName()           { return {}; }
+String SystemStats::getUserLanguage()           { return {}; }
+String SystemStats::getUserRegion()             { return {}; }
+String SystemStats::getDisplayLanguage()        { return {}; }
+
+//==============================================================================
+void CPUInformation::initialise() noexcept
+{
+    numLogicalCPUs = 1;
+    numPhysicalCPUs = 1;
+}
+
+//==============================================================================
+uint32 juce_millisecondsSinceStartup() noexcept
+{
+    return static_cast<uint32> (emscripten_get_now());
+}
+
+int64 Time::getHighResolutionTicks() noexcept
+{
+    return static_cast<int64> (emscripten_get_now() * 1000.0);
+}
+
+int64 Time::getHighResolutionTicksPerSecond() noexcept
+{
+    return 1000000;  // (microseconds)
+}
+
+double Time::getMillisecondCounterHiRes() noexcept
+{
+    return emscripten_get_now();
+}
+
+bool Time::setSystemTimeToThisTime() const
+{
+    return false;
+}
+
+JUCE_API bool JUCE_CALLTYPE juce_isRunningUnderDebugger() noexcept
+{
+    return false;
+}
+
+} // namespace juce
diff --git a/modules/juce_core/network/juce_NamedPipe.cpp b/modules/juce_core/network/juce_NamedPipe.cpp
index c39ac66d6e..a4a26ecfc7 100644
--- a/modules/juce_core/network/juce_NamedPipe.cpp
+++ b/modules/juce_core/network/juce_NamedPipe.cpp
@@ -23,6 +23,8 @@
 namespace juce
 {
 
+#if ! JUCE_WASM
+
 NamedPipe::NamedPipe() {}
 
 NamedPipe::~NamedPipe()
@@ -265,6 +267,7 @@ private:
 
 static NamedPipeTests namedPipeTests;
 
+#endif
 #endif
 
 } // namespace juce
diff --git a/modules/juce_core/network/juce_Socket.cpp b/modules/juce_core/network/juce_Socket.cpp
index 64168aa721..a43cb141db 100644
--- a/modules/juce_core/network/juce_Socket.cpp
+++ b/modules/juce_core/network/juce_Socket.cpp
@@ -23,6 +23,8 @@
 namespace juce
 {
 
+#if ! JUCE_WASM
+
 JUCE_BEGIN_IGNORE_WARNINGS_MSVC (4127 4389 4018)
 
 #ifndef AI_NUMERICSERV  // (missing in older Mac SDKs)
@@ -857,6 +859,7 @@ struct SocketTests : public UnitTest
 
 static SocketTests socketTests;
 
+#endif
 #endif
 
 } // namespace juce
diff --git a/modules/juce_core/system/juce_SystemStats.cpp b/modules/juce_core/system/juce_SystemStats.cpp
index 847127162f..813a23b298 100644
--- a/modules/juce_core/system/juce_SystemStats.cpp
+++ b/modules/juce_core/system/juce_SystemStats.cpp
@@ -138,7 +138,7 @@ String SystemStats::getStackBacktrace()
 {
     String result;
 
-   #if JUCE_ANDROID || JUCE_MINGW
+   #if JUCE_ANDROID || JUCE_MINGW || JUCE_WASM
     jassertfalse; // sorry, not implemented yet!
 
    #elif JUCE_WINDOWS
@@ -187,6 +187,8 @@ String SystemStats::getStackBacktrace()
 }
 
 //==============================================================================
+#if ! JUCE_WASM
+
 static SystemStats::CrashHandlerFunction globalCrashHandler = nullptr;
 
 #if JUCE_WINDOWS
@@ -223,6 +225,8 @@ void SystemStats::setApplicationCrashHandler (CrashHandlerFunction handler)
    #endif
 }
 
+#endif
+
 bool SystemStats::isRunningInAppExtensionSandbox() noexcept
 {
    #if JUCE_MAC || JUCE_IOS
diff --git a/modules/juce_core/system/juce_SystemStats.h b/modules/juce_core/system/juce_SystemStats.h
index 5e4d2b1074..d42a185c3e 100644
--- a/modules/juce_core/system/juce_SystemStats.h
+++ b/modules/juce_core/system/juce_SystemStats.h
@@ -51,6 +51,7 @@ public:
         Linux           = 0x0400,
         Android         = 0x0800,
         iOS             = 0x1000,
+        WASM            = 0x2000,
 
         MacOSX_10_7     = MacOSX | 7,
         MacOSX_10_8     = MacOSX | 8,
diff --git a/modules/juce_core/system/juce_TargetPlatform.h b/modules/juce_core/system/juce_TargetPlatform.h
index d0530b48cf..5b4d293bb6 100644
--- a/modules/juce_core/system/juce_TargetPlatform.h
+++ b/modules/juce_core/system/juce_TargetPlatform.h
@@ -65,7 +65,7 @@
 #elif defined (__FreeBSD__) || (__OpenBSD__)
   #define       JUCE_BSD 1
 #elif defined (LINUX) || defined (__linux__)
-  #define     JUCE_LINUX 1
+  #define       JUCE_LINUX 1
 #elif defined (__APPLE_CPP__) || defined (__APPLE_CC__)
   #define CF_EXCLUDE_CSTD_HEADERS 1
   #include <TargetConditionals.h> // (needed to find out what platform we're using)
@@ -78,6 +78,8 @@
   #else
     #define     JUCE_MAC 1
   #endif
+#elif defined (__wasm__)
+  #define       JUCE_WASM 1
 #else
   #error "Unknown platform!"
 #endif
diff --git a/modules/juce_graphics/image_formats/juce_PNGLoader.cpp b/modules/juce_graphics/image_formats/juce_PNGLoader.cpp
index 79418fb84d..210632bf86 100644
--- a/modules/juce_graphics/image_formats/juce_PNGLoader.cpp
+++ b/modules/juce_graphics/image_formats/juce_PNGLoader.cpp
@@ -73,6 +73,10 @@ namespace pnglibNamespace
   #define PNG_ARM_NEON_SUPPORTED
  #endif
 
+ #ifndef Byte
+  using Byte = uint8_t;
+ #endif
+
   #define PNG_16BIT_SUPPORTED
   #define PNG_ALIGNED_MEMORY_SUPPORTED
   #define PNG_BENIGN_ERRORS_SUPPORTED