diff --git a/include/qpdf/QPDFJob.hh b/include/qpdf/QPDFJob.hh
index b12c052a..c5cc70b9 100644
--- a/include/qpdf/QPDFJob.hh
+++ b/include/qpdf/QPDFJob.hh
@@ -586,135 +586,142 @@ class QPDFJob
         ~Members() = default;
 
       private:
+        // These default values are duplicated in help and docs.
+        static int constexpr DEFAULT_KEEP_FILES_OPEN_THRESHOLD = 200;
+        static int constexpr DEFAULT_OI_MIN_WIDTH = 128;
+        static int constexpr DEFAULT_OI_MIN_HEIGHT = 128;
+        static int constexpr DEFAULT_OI_MIN_AREA = 16384;
+        static int constexpr DEFAULT_II_MIN_BYTES = 1024;
+
         Members();
         Members(Members const&) = delete;
 
         std::shared_ptr<QPDFLogger> log;
-        std::string message_prefix;
-        bool warnings;
-        unsigned long encryption_status;
-        bool verbose;
+        std::string message_prefix{"qpdf"};
+        bool warnings{false};
+        unsigned long encryption_status{0};
+        bool verbose{false};
         std::shared_ptr<char> password;
-        bool linearize;
-        bool decrypt;
-        int split_pages;
-        bool progress;
-        std::function<void(int)> progress_handler;
-        bool suppress_warnings;
-        bool warnings_exit_zero;
-        bool copy_encryption;
+        bool linearize{false};
+        bool decrypt{false};
+        int split_pages{0};
+        bool progress{false};
+        std::function<void(int)> progress_handler{nullptr};
+        bool suppress_warnings{false};
+        bool warnings_exit_zero{false};
+        bool copy_encryption{false};
         std::string encryption_file;
         std::shared_ptr<char> encryption_file_password;
-        bool encrypt;
-        bool password_is_hex_key;
-        bool suppress_password_recovery;
-        password_mode_e password_mode;
-        bool allow_insecure;
-        bool allow_weak_crypto;
+        bool encrypt{false};
+        bool password_is_hex_key{false};
+        bool suppress_password_recovery{false};
+        password_mode_e password_mode{pm_auto};
+        bool allow_insecure{false};
+        bool allow_weak_crypto{false};
         std::string user_password;
         std::string owner_password;
-        int keylen;
-        bool r2_print;
-        bool r2_modify;
-        bool r2_extract;
-        bool r2_annotate;
-        bool r3_accessibility;
-        bool r3_extract;
-        bool r3_assemble;
-        bool r3_annotate_and_form;
-        bool r3_form_filling;
-        bool r3_modify_other;
-        qpdf_r3_print_e r3_print;
-        bool force_V4;
-        bool force_R5;
-        bool cleartext_metadata;
-        bool use_aes;
-        bool stream_data_set;
-        qpdf_stream_data_e stream_data_mode;
-        bool compress_streams;
-        bool compress_streams_set;
-        bool recompress_flate;
-        bool recompress_flate_set;
-        int compression_level;
-        qpdf_stream_decode_level_e decode_level;
-        bool decode_level_set;
-        bool normalize_set;
-        bool normalize;
-        bool suppress_recovery;
-        bool object_stream_set;
-        qpdf_object_stream_e object_stream_mode;
-        bool ignore_xref_streams;
-        bool qdf_mode;
-        bool preserve_unreferenced_objects;
-        remove_unref_e remove_unreferenced_page_resources;
-        bool keep_files_open;
-        bool keep_files_open_set;
-        size_t keep_files_open_threshold;
-        bool newline_before_endstream;
+        int keylen{0};
+        bool r2_print{true};
+        bool r2_modify{true};
+        bool r2_extract{true};
+        bool r2_annotate{true};
+        bool r3_accessibility{true};
+        bool r3_extract{true};
+        bool r3_assemble{true};
+        bool r3_annotate_and_form{true};
+        bool r3_form_filling{true};
+        bool r3_modify_other{true};
+        qpdf_r3_print_e r3_print{qpdf_r3p_full};
+        bool force_V4{false};
+        bool force_R5{false};
+        bool cleartext_metadata{false};
+        bool use_aes{false};
+        bool stream_data_set{false};
+        qpdf_stream_data_e stream_data_mode{qpdf_s_compress};
+        bool compress_streams{true};
+        bool compress_streams_set{false};
+        bool recompress_flate{false};
+        bool recompress_flate_set{false};
+        int compression_level{-1};
+        qpdf_stream_decode_level_e decode_level{qpdf_dl_generalized};
+        bool decode_level_set{false};
+        bool normalize_set{false};
+        bool normalize{false};
+        bool suppress_recovery{false};
+        bool object_stream_set{false};
+        qpdf_object_stream_e object_stream_mode{qpdf_o_preserve};
+        bool ignore_xref_streams{false};
+        bool qdf_mode{false};
+        bool preserve_unreferenced_objects{false};
+        remove_unref_e remove_unreferenced_page_resources{re_auto};
+        bool keep_files_open{true};
+        bool keep_files_open_set{false};
+        size_t keep_files_open_threshold{DEFAULT_KEEP_FILES_OPEN_THRESHOLD};
+        bool newline_before_endstream{false};
         std::string linearize_pass1;
-        bool coalesce_contents;
-        bool flatten_annotations;
-        int flatten_annotations_required;
-        int flatten_annotations_forbidden;
-        bool generate_appearances;
+        bool coalesce_contents{false};
+        bool flatten_annotations{false};
+        int flatten_annotations_required{0};
+        int flatten_annotations_forbidden{an_invisible | an_hidden};
+        bool generate_appearances{false};
         PDFVersion max_input_version;
         std::string min_version;
         std::string force_version;
-        bool show_npages;
-        bool deterministic_id;
-        bool static_id;
-        bool static_aes_iv;
-        bool suppress_original_object_id;
-        bool show_encryption;
-        bool show_encryption_key;
-        bool check_linearization;
-        bool show_linearization;
-        bool show_xref;
-        bool show_trailer;
-        int show_obj;
-        int show_gen;
-        bool show_raw_stream_data;
-        bool show_filtered_stream_data;
-        bool show_pages;
-        bool show_page_images;
-        size_t collate;
-        bool flatten_rotation;
-        bool list_attachments;
+        bool show_npages{false};
+        bool deterministic_id{false};
+        bool static_id{false};
+        bool static_aes_iv{false};
+        bool suppress_original_object_id{false};
+        bool show_encryption{false};
+        bool show_encryption_key{false};
+        bool check_linearization{false};
+        bool show_linearization{false};
+        bool show_xref{false};
+        bool show_trailer{false};
+        int show_obj{0};
+        int show_gen{0};
+        bool show_raw_stream_data{false};
+        bool show_filtered_stream_data{false};
+        bool show_pages{false};
+        bool show_page_images{false};
+        size_t collate{0};
+        bool flatten_rotation{false};
+        bool list_attachments{false};
         std::string attachment_to_show;
         std::list<std::string> attachments_to_remove;
         std::list<AddAttachment> attachments_to_add;
         std::list<CopyAttachmentFrom> attachments_to_copy;
-        int json_version;
+        int json_version{0};
         std::set<std::string> json_keys;
         std::set<std::string> json_objects;
-        qpdf_json_stream_data_e json_stream_data;
-        bool json_stream_data_set;
+        qpdf_json_stream_data_e json_stream_data{qpdf_sj_none};
+        bool json_stream_data_set{false};
         std::string json_stream_prefix;
-        bool test_json_schema;
-        bool check;
-        bool optimize_images;
-        bool externalize_inline_images;
-        bool keep_inline_images;
-        bool remove_page_labels;
-        size_t oi_min_width;
-        size_t oi_min_height;
-        size_t oi_min_area;
-        size_t ii_min_bytes;
-        UnderOverlay underlay;
-        UnderOverlay overlay;
-        UnderOverlay* under_overlay;
+        bool test_json_schema{false};
+        bool check{false};
+        bool optimize_images{false};
+        bool externalize_inline_images{false};
+        bool keep_inline_images{false};
+        bool remove_page_labels{false};
+        size_t oi_min_width{DEFAULT_OI_MIN_WIDTH};
+        size_t oi_min_height{DEFAULT_OI_MIN_HEIGHT};
+        size_t oi_min_area{DEFAULT_OI_MIN_AREA};
+        size_t ii_min_bytes{DEFAULT_II_MIN_BYTES};
+        UnderOverlay underlay{"underlay"};
+        UnderOverlay overlay{"overlay"};
+        UnderOverlay* under_overlay{nullptr};
         std::vector<PageSpec> page_specs;
         std::map<std::string, RotationSpec> rotations;
-        bool require_outfile;
-        bool replace_input;
-        bool check_is_encrypted;
-        bool check_requires_password;
+        bool require_outfile{true};
+        bool replace_input{false};
+        bool check_is_encrypted{false};
+        bool check_requires_password{false};
         std::shared_ptr<char> infilename;
         std::shared_ptr<char> outfilename;
-        bool json_input;
-        bool json_output;
+        bool json_input{false};
+        bool json_output{false};
         std::string update_from_json;
-        bool report_mem_usage;
+        bool report_mem_usage{false};
     };
     std::shared_ptr<Members> m;
 };
diff --git a/libqpdf/QPDFJob.cc b/libqpdf/QPDFJob.cc
index 01e4a22a..c46e1951 100644
--- a/libqpdf/QPDFJob.cc
+++ b/libqpdf/QPDFJob.cc
@@ -304,121 +304,8 @@ ProgressReporter::reportProgress(int percentage)
             << "%\n";
 }
 
-// These default values are duplicated in help and docs.
-static int constexpr DEFAULT_KEEP_FILES_OPEN_THRESHOLD = 200;
-static int constexpr DEFAULT_OI_MIN_WIDTH = 128;
-static int constexpr DEFAULT_OI_MIN_HEIGHT = 128;
-static int constexpr DEFAULT_OI_MIN_AREA = 16384;
-static int constexpr DEFAULT_II_MIN_BYTES = 1024;
-
 QPDFJob::Members::Members() :
-    log(QPDFLogger::defaultLogger()),
-    message_prefix("qpdf"),
-    warnings(false),
-    encryption_status(0),
-    verbose(false),
-    password(nullptr),
-    linearize(false),
-    decrypt(false),
-    split_pages(0),
-    progress(false),
-    progress_handler(nullptr),
-    suppress_warnings(false),
-    warnings_exit_zero(false),
-    copy_encryption(false),
-    encryption_file_password(nullptr),
-    encrypt(false),
-    password_is_hex_key(false),
-    suppress_password_recovery(false),
-    password_mode(pm_auto),
-    allow_insecure(false),
-    allow_weak_crypto(false),
-    keylen(0),
-    r2_print(true),
-    r2_modify(true),
-    r2_extract(true),
-    r2_annotate(true),
-    r3_accessibility(true),
-    r3_extract(true),
-    r3_assemble(true),
-    r3_annotate_and_form(true),
-    r3_form_filling(true),
-    r3_modify_other(true),
-    r3_print(qpdf_r3p_full),
-    force_V4(false),
-    force_R5(false),
-    cleartext_metadata(false),
-    use_aes(false),
-    stream_data_set(false),
-    stream_data_mode(qpdf_s_compress),
-    compress_streams(true),
-    compress_streams_set(false),
-    recompress_flate(false),
-    recompress_flate_set(false),
-    compression_level(-1),
-    decode_level(qpdf_dl_generalized),
-    decode_level_set(false),
-    normalize_set(false),
-    normalize(false),
-    suppress_recovery(false),
-    object_stream_set(false),
-    object_stream_mode(qpdf_o_preserve),
-    ignore_xref_streams(false),
-    qdf_mode(false),
-    preserve_unreferenced_objects(false),
-    remove_unreferenced_page_resources(re_auto),
-    keep_files_open(true),
-    keep_files_open_set(false),
-    keep_files_open_threshold(DEFAULT_KEEP_FILES_OPEN_THRESHOLD),
-    newline_before_endstream(false),
-    coalesce_contents(false),
-    flatten_annotations(false),
-    flatten_annotations_required(0),
-    flatten_annotations_forbidden(an_invisible | an_hidden),
-    generate_appearances(false),
-    show_npages(false),
-    deterministic_id(false),
-    static_id(false),
-    static_aes_iv(false),
-    suppress_original_object_id(false),
-    show_encryption(false),
-    show_encryption_key(false),
-    check_linearization(false),
-    show_linearization(false),
-    show_xref(false),
-    show_trailer(false),
-    show_obj(0),
-    show_gen(0),
-    show_raw_stream_data(false),
-    show_filtered_stream_data(false),
-    show_pages(false),
-    show_page_images(false),
-    collate(0),
-    flatten_rotation(false),
-    list_attachments(false),
-    json_version(0),
-    json_stream_data(qpdf_sj_none),
-    json_stream_data_set(false),
-    test_json_schema(false),
-    check(false),
-    optimize_images(false),
-    externalize_inline_images(false),
-    keep_inline_images(false),
-    remove_page_labels(false),
-    oi_min_width(DEFAULT_OI_MIN_WIDTH),
-    oi_min_height(DEFAULT_OI_MIN_HEIGHT),
-    oi_min_area(DEFAULT_OI_MIN_AREA),
-    ii_min_bytes(DEFAULT_II_MIN_BYTES),
-    underlay("underlay"),
-    overlay("overlay"),
-    under_overlay(nullptr),
-    require_outfile(true),
-    replace_input(false),
-    check_is_encrypted(false),
-    check_requires_password(false),
-    json_input(false),
-    json_output(false),
-    report_mem_usage(false)
+    log(QPDFLogger::defaultLogger())
 {
 }