diff --git a/cpdf.ml b/cpdf.ml
index 112d80d..615dc8b 100644
--- a/cpdf.ml
+++ b/cpdf.ml
@@ -833,8 +833,30 @@ let output_string_of_target pdf fastrefnums x =
         "\"" ^ Pdfwrite.string_of_pdf a ^ "\"" 
   | x -> "\"" ^ Pdfwrite.string_of_pdf x ^ "\""
 
+let json_of_target pdf fastrefnums x =
+  match Pdfdest.pdfobject_of_destination x with
+  | Pdf.Array (_::more) ->
+      let a =
+        Pdf.Array (Pdf.Integer (Pdfpage.pagenumber_of_target ~fastrefnums pdf x)::more)
+      in
+        Cpdfjson.json_of_object pdf (fun _ -> ()) false false a
+  | x -> Cpdfjson.json_of_object pdf (fun _ -> ()) false false x
+
+let output_json_marks ch calculate_page_number pdf fastrefnums marks =
+  let module J = Cpdfyojson.Safe in
+  let json_of_mark m =
+    `Assoc
+       [("level", `Int m.Pdfmarks.level);
+        ("text", `String m.Pdfmarks.text);
+        ("page", `Int (calculate_page_number m));
+        ("open", `Bool m.Pdfmarks.isopen);
+        ("target", json_of_target pdf fastrefnums m.Pdfmarks.target)]
+  in
+  let json = `List (map json_of_mark marks) in
+    J.pretty_to_channel ch json
+
 (* List the bookmarks, optionally deunicoding the text, in the given range to the given output *)
-let list_bookmarks encoding range pdf output =
+let list_bookmarks ~json encoding range pdf output =
   let process_stripped escaped =
     let b = Buffer.create 200 in
       iter
@@ -889,16 +911,19 @@ let list_bookmarks encoding range pdf output =
              * we add one. Pdfpage.pagenumber_of_target has been modified to support this.*)
             Pdfpage.pagenumber_of_target ~fastrefnums pdf mark.Pdfmarks.target
           in
-            iter
-              (function mark ->
-                 output.Pdfio.output_string
-                   (Printf.sprintf "%i \"%s\" %i%s %s\n"
-                     mark.Pdfmarks.level
-                     (process_string mark.Pdfmarks.text)
-                     (calculate_page_number mark)
-                     (if mark.Pdfmarks.isopen then " open" else "")
-                     (output_string_of_target pdf fastrefnums mark.Pdfmarks.target)))
-              inrange
+            if json then
+              output_json_marks stdout calculate_page_number pdf fastrefnums inrange
+            else
+              iter
+                (function mark ->
+                   output.Pdfio.output_string
+                     (Printf.sprintf "%i \"%s\" %i%s %s\n"
+                       mark.Pdfmarks.level
+                       (process_string mark.Pdfmarks.text)
+                       (calculate_page_number mark)
+                       (if mark.Pdfmarks.isopen then " open" else "")
+                       (output_string_of_target pdf fastrefnums mark.Pdfmarks.target)))
+                inrange
 
 (* o is the stamp, u is the main pdf page *)
 
diff --git a/cpdf.mli b/cpdf.mli
index 25a6473..09aabcc 100644
--- a/cpdf.mli
+++ b/cpdf.mli
@@ -101,7 +101,7 @@ val add_bookmarks : bool -> Pdfio.input -> Pdf.t -> Pdf.t
 
 (** [list_bookmarks encoding range pdf output] lists the bookmarks to the given
 output in the format specified in cpdfmanual.pdf *)
-val list_bookmarks : encoding -> int list -> Pdf.t -> Pdfio.output -> unit
+val list_bookmarks : json:bool -> encoding -> int list -> Pdf.t -> Pdfio.output -> unit
 
 (** {2 XML Metadata} *)
 
diff --git a/cpdfcommand.ml b/cpdfcommand.ml
index e5ce25d..e7a2ded 100644
--- a/cpdfcommand.ml
+++ b/cpdfcommand.ml
@@ -678,7 +678,7 @@ let reset_arguments () =
   args.impose_margin <- 0.;
   args.impose_spacing <- 0.;
   args.impose_linewidth <- 0.;
-  args.bookmarks_json <- true
+  args.bookmarks_json <- false
   (* Do not reset original_filename or cpdflin or was_encrypted or
    * was_decrypted_with_owner or recrypt or producer or creator or path_to_* or
    * gs_malformed or gs_quiet, since we want these to work across ANDs. Or
@@ -3448,7 +3448,7 @@ let go () =
       | (_, pagespec, _, _, _, _)::_, _ ->
         let pdf = get_single_pdf args.op true in
           let range = parse_pagespec_allow_empty pdf pagespec in
-            Cpdf.list_bookmarks args.encoding range pdf (Pdfio.output_of_channel stdout);
+            Cpdf.list_bookmarks args.bookmarks_json args.encoding range pdf (Pdfio.output_of_channel stdout);
             flush stdout
       | _ -> error "list-bookmarks: bad command line"
       end
diff --git a/cpdfjson.mli b/cpdfjson.mli
index 6abe8cb..51e309c 100644
--- a/cpdfjson.mli
+++ b/cpdfjson.mli
@@ -1,2 +1,3 @@
+val json_of_object : Pdf.t -> (int -> unit) -> bool -> bool -> Pdf.pdfobject -> Cpdfyojson.Safe.t
 val to_output : Pdfio.output -> parse_content:bool -> no_stream_data:bool -> decompress_streams:bool -> Pdf.t -> unit
 val of_input : Pdfio.input -> Pdf.t