diff --git a/src/compiler/api/GF/Compile/Export.hs b/src/compiler/api/GF/Compile/Export.hs
index 603244862..1b1b0be4f 100644
--- a/src/compiler/api/GF/Compile/Export.hs
+++ b/src/compiler/api/GF/Compile/Export.hs
@@ -34,6 +34,7 @@ exportPGF opts fmt pgf =
       FmtPGFPretty    -> multi "txt" (showPGF)
       FmtCanonicalGF  -> [] -- canon "gf" (render80 . abstract2canonical)
       FmtCanonicalJson-> []
+      FmtSourceJson   -> []
       FmtHaskell      -> multi "hs"  (grammar2haskell opts name)
       FmtJava         -> multi "java" (grammar2java opts name)
       FmtBNF          -> single "bnf"   bnfPrinter
diff --git a/src/compiler/api/GF/Compiler.hs b/src/compiler/api/GF/Compiler.hs
index 78ec1796e..d046063c8 100644
--- a/src/compiler/api/GF/Compiler.hs
+++ b/src/compiler/api/GF/Compiler.hs
@@ -72,6 +72,8 @@ compileSourceFiles opts fs =
          when (FmtCanonicalJson `elem` ofmts) $
            do (gr_canon,_) <- runCheck (grammar2canonical opts absname gr)
               writeExport (render absname ++ ".json", encode (grammar2json gr_canon))
+         when (FmtSourceJson `elem` ofmts) $
+           do writeExport (render absname ++ ".json", encode (grammar2json gr))
       where
         ofmts = flag optOutputFormats opts
 
diff --git a/src/compiler/api/GF/Infra/Option.hs b/src/compiler/api/GF/Infra/Option.hs
index 30e27720d..0f902f723 100644
--- a/src/compiler/api/GF/Infra/Option.hs
+++ b/src/compiler/api/GF/Infra/Option.hs
@@ -87,6 +87,7 @@ data Phase = Preproc | Convert | Compile | Link
 data OutputFormat = FmtPGFPretty
                   | FmtCanonicalGF
                   | FmtCanonicalJson
+                  | FmtSourceJson
                   | FmtJavaScript
                   | FmtJSON
                   | FmtPython
@@ -474,6 +475,7 @@ outputFormatsExpl =
     [(("pgf_pretty",   FmtPGFPretty),"human-readable pgf"),
      (("canonical_gf", FmtCanonicalGF),"Canonical GF source files"),
      (("canonical_json", FmtCanonicalJson),"Canonical JSON source files"),
+     (("source_json",  FmtSourceJson),"Source grammar as a JSON file"),
      (("json",         FmtJSON),"JSON (whole grammar)"),
      (("haskell",      FmtHaskell),"Haskell (abstract syntax)"),
      (("java",         FmtJava),"Java (abstract syntax)"),