# Project information
site_name: JSON for Modern C++
site_author: Niels Lohmann
site_url: https://json.nlohmann.me/

# Repository
repo_name: nlohmann/json
repo_url: https://github.com/nlohmann/json
edit_uri: edit/develop/docs/mkdocs/docs

# Copyright
copyright: Copyright &copy; 2013-2026 Niels Lohmann

# Configuration
theme:
  name: material
  language: en
  palette:
    - media: '(prefers-color-scheme: light)'
      scheme: default
      primary: indigo
      accent: indigo
      toggle:
        icon: material/brightness-7
        name: Switch to dark mode
    - media: '(prefers-color-scheme: dark)'
      scheme: slate
      primary: indigo
      accent: indigo
      toggle:
        icon: material/brightness-4
        name: Switch to light mode
  icon:
    repo: fontawesome/brands/github
  font:
    text: Roboto
    code: JetBrains Mono
  features:
    - navigation.instant
    - navigation.tracking
    - navigation.tabs
    - navigation.indexes
    - navigation.top
    - content.tabs.link
    - content.action.edit
    - content.action.view

nav:
  - Home:
      - index.md
      - home/license.md
      - "FAQ": home/faq.md
      - home/exceptions.md
      - home/releases.md
      - home/design_goals.md
      - home/architecture.md
      - home/customers.md
      - home/sponsors.md
  - Features:
      - features/index.md
      - features/arbitrary_types.md
      - Binary Formats:
          - features/binary_formats/index.md
          - features/binary_formats/bjdata.md
          - features/binary_formats/bson.md
          - features/binary_formats/cbor.md
          - features/binary_formats/messagepack.md
          - features/binary_formats/ubjson.md
      - features/binary_values.md
      - features/comments.md
      - features/conversions.md
      - features/creating_values.md
      - Element Access:
          - features/element_access/index.md
          - features/element_access/unchecked_access.md
          - features/element_access/checked_access.md
          - features/element_access/default_value.md
      - features/iterators.md
      - features/merge_patch.md
      - features/json_patch.md
      - features/json_pointer.md
      - features/modifying_values.md
      - features/modules.md
      - 'nlohmann Namespace': features/namespace.md
      - features/object_order.md
      - Parsing:
          - features/parsing/index.md
          - features/parsing/json_lines.md
          - features/parsing/parse_exceptions.md
          - features/parsing/parser_callbacks.md
          - features/parsing/sax_interface.md
      - features/assertions.md
      - features/serialization.md
      - features/enum_conversion.md
      - features/macros.md
      - features/trailing_commas.md
      - Types:
          - features/types/index.md
          - features/types/number_handling.md
  - Integration:
      - integration/index.md
      - integration/migration_guide.md
      - integration/cmake.md
      - integration/package_managers.md
      - integration/pkg-config.md
  - API Documentation:
      - basic_json:
          - 'Overview': api/basic_json/index.md
          - '(Constructor)': api/basic_json/basic_json.md
          - '(Destructor)': api/basic_json/~basic_json.md
          - 'accept': api/basic_json/accept.md
          - 'array': api/basic_json/array.md
          - 'array_t': api/basic_json/array_t.md
          - 'at': api/basic_json/at.md
          - 'back': api/basic_json/back.md
          - 'begin': api/basic_json/begin.md
          - 'binary': api/basic_json/binary.md
          - 'binary_t': api/basic_json/binary_t.md
          - 'boolean_t': api/basic_json/boolean_t.md
          - 'cbegin': api/basic_json/cbegin.md
          - 'cbor_tag_handler_t': api/basic_json/cbor_tag_handler_t.md
          - 'cend': api/basic_json/cend.md
          - 'clear': api/basic_json/clear.md
          - 'contains': api/basic_json/contains.md
          - 'count': api/basic_json/count.md
          - 'crbegin': api/basic_json/crbegin.md
          - 'crend': api/basic_json/crend.md
          - 'default_object_comparator_t': api/basic_json/default_object_comparator_t.md
          - 'diff': api/basic_json/diff.md
          - 'dump': api/basic_json/dump.md
          - 'emplace': api/basic_json/emplace.md
          - 'emplace_back': api/basic_json/emplace_back.md
          - 'empty': api/basic_json/empty.md
          - 'end': api/basic_json/end.md
          - 'end_pos': api/basic_json/end_pos.md
          - 'erase': api/basic_json/erase.md
          - 'error_handler_t': api/basic_json/error_handler_t.md
          - 'exception': api/basic_json/exception.md
          - 'find': api/basic_json/find.md
          - 'flatten': api/basic_json/flatten.md
          - 'format_as': api/basic_json/format_as.md
          - 'from_bjdata': api/basic_json/from_bjdata.md
          - 'from_bson': api/basic_json/from_bson.md
          - 'from_cbor': api/basic_json/from_cbor.md
          - 'from_msgpack': api/basic_json/from_msgpack.md
          - 'from_ubjson': api/basic_json/from_ubjson.md
          - 'front': api/basic_json/front.md
          - 'get': api/basic_json/get.md
          - 'get_allocator': api/basic_json/get_allocator.md
          - 'get_binary': api/basic_json/get_binary.md
          - 'get_ptr': api/basic_json/get_ptr.md
          - 'get_ref': api/basic_json/get_ref.md
          - 'get_to': api/basic_json/get_to.md
          - 'std::formatter&lt;basic_json&gt;': api/basic_json/std_formatter.md
          - 'std::hash&lt;basic_json&gt;': api/basic_json/std_hash.md
          - 'input_format_t': api/basic_json/input_format_t.md
          - 'insert': api/basic_json/insert.md
          - 'invalid_iterator': api/basic_json/invalid_iterator.md
          - 'is_array': api/basic_json/is_array.md
          - 'is_binary': api/basic_json/is_binary.md
          - 'is_boolean': api/basic_json/is_boolean.md
          - 'is_discarded': api/basic_json/is_discarded.md
          - 'is_null': api/basic_json/is_null.md
          - 'is_number': api/basic_json/is_number.md
          - 'is_number_float': api/basic_json/is_number_float.md
          - 'is_number_integer': api/basic_json/is_number_integer.md
          - 'is_number_unsigned': api/basic_json/is_number_unsigned.md
          - 'is_object': api/basic_json/is_object.md
          - 'is_primitive': api/basic_json/is_primitive.md
          - 'is_string': api/basic_json/is_string.md
          - 'is_structured': api/basic_json/is_structured.md
          - 'items': api/basic_json/items.md
          - 'json_base_class_t': api/basic_json/json_base_class_t.md
          - 'json_serializer': api/basic_json/json_serializer.md
          - 'max_size': api/basic_json/max_size.md
          - 'meta': api/basic_json/meta.md
          - 'merge_patch': api/basic_json/merge_patch.md
          - 'number_float_t': api/basic_json/number_float_t.md
          - 'number_integer_t': api/basic_json/number_integer_t.md
          - 'number_unsigned_t': api/basic_json/number_unsigned_t.md
          - 'object': api/basic_json/object.md
          - 'object_comparator_t': api/basic_json/object_comparator_t.md
          - 'object_t': api/basic_json/object_t.md
          - 'operator ValueType': api/basic_json/operator_ValueType.md
          - 'operator value_t': api/basic_json/operator_value_t.md
          - 'operator[]': api/basic_json/operator[].md
          - 'operator=': api/basic_json/operator=.md
          - 'operator+=': api/basic_json/operator+=.md
          - 'operator==': api/basic_json/operator_eq.md
          - 'operator!=': api/basic_json/operator_ne.md
          - 'operator<': api/basic_json/operator_lt.md
          - 'operator>': api/basic_json/operator_gt.md
          - 'operator<=': api/basic_json/operator_le.md
          - 'operator>=': api/basic_json/operator_ge.md
          - 'operator<=>': api/basic_json/operator_spaceship.md
          - 'out_of_range': api/basic_json/out_of_range.md
          - 'other_error': api/basic_json/other_error.md
          - 'parse': api/basic_json/parse.md
          - 'parse_error': api/basic_json/parse_error.md
          - 'parse_event_t': api/basic_json/parse_event_t.md
          - 'parser_callback_t': api/basic_json/parser_callback_t.md
          - 'patch': api/basic_json/patch.md
          - 'patch_inplace': api/basic_json/patch_inplace.md
          - 'push_back': api/basic_json/push_back.md
          - 'rbegin': api/basic_json/rbegin.md
          - 'rend': api/basic_json/rend.md
          - 'sax_parse': api/basic_json/sax_parse.md
          - 'size': api/basic_json/size.md
          - 'start_pos': api/basic_json/start_pos.md
          - 'string_t': api/basic_json/string_t.md
          - 'swap': api/basic_json/swap.md
          - 'std::swap&lt;basic_json&gt;': api/basic_json/std_swap.md
          - 'to_bjdata': api/basic_json/to_bjdata.md
          - 'to_bson': api/basic_json/to_bson.md
          - 'to_cbor': api/basic_json/to_cbor.md
          - 'to_msgpack': api/basic_json/to_msgpack.md
          - 'to_string': api/basic_json/to_string.md
          - 'to_ubjson': api/basic_json/to_ubjson.md
          - 'type': api/basic_json/type.md
          - 'type_error': api/basic_json/type_error.md
          - 'type_name': api/basic_json/type_name.md
          - 'unflatten': api/basic_json/unflatten.md
          - 'update': api/basic_json/update.md
          - 'value': api/basic_json/value.md
          - 'value_t': api/basic_json/value_t.md
      - byte_container_with_subtype:
          - 'Overview': api/byte_container_with_subtype/index.md
          - '(constructor)': api/byte_container_with_subtype/byte_container_with_subtype.md
          - 'clear_subtype': api/byte_container_with_subtype/clear_subtype.md
          - 'has_subtype': api/byte_container_with_subtype/has_subtype.md
          - 'set_subtype': api/byte_container_with_subtype/set_subtype.md
          - 'subtype': api/byte_container_with_subtype/subtype.md
      - adl_serializer:
          - 'Overview': api/adl_serializer/index.md
          - 'from_json': api/adl_serializer/from_json.md
          - 'to_json': api/adl_serializer/to_json.md
      - 'json': api/json.md
      - json_pointer:
          - 'Overview': api/json_pointer/index.md
          - '(Constructor)': api/json_pointer/json_pointer.md
          - 'back': api/json_pointer/back.md
          - 'empty': api/json_pointer/empty.md
          - 'front': api/json_pointer/front.md
          - 'operator string_t': api/json_pointer/operator_string_t.md
          - 'operator==': api/json_pointer/operator_eq.md
          - 'operator!=': api/json_pointer/operator_ne.md
          - 'operator/': api/json_pointer/operator_slash.md
          - 'operator/=': api/json_pointer/operator_slasheq.md
          - 'parent_pointer': api/json_pointer/parent_pointer.md
          - 'pop_back': api/json_pointer/pop_back.md
          - 'pop_front': api/json_pointer/pop_front.md
          - 'push_back': api/json_pointer/push_back.md
          - 'push_front': api/json_pointer/push_front.md
          - 'string_t': api/json_pointer/string_t.md
          - 'to_string': api/json_pointer/to_string.md
      - json_sax:
          - 'Overview': api/json_sax/index.md
          - 'binary': api/json_sax/binary.md
          - 'boolean': api/json_sax/boolean.md
          - 'end_array': api/json_sax/end_array.md
          - 'end_object': api/json_sax/end_object.md
          - 'key': api/json_sax/key.md
          - 'null': api/json_sax/null.md
          - 'number_float': api/json_sax/number_float.md
          - 'number_integer': api/json_sax/number_integer.md
          - 'number_unsigned': api/json_sax/number_unsigned.md
          - 'parse_error': api/json_sax/parse_error.md
          - 'start_array': api/json_sax/start_array.md
          - 'start_object': api/json_sax/start_object.md
          - 'string': api/json_sax/string.md
      - 'operator<<(basic_json), operator<<(json_pointer)': api/operator_ltlt.md
      - 'operator>>(basic_json)': api/operator_gtgt.md
      - 'operator""_json': api/operator_literal_json.md
      - 'operator""_json_pointer': api/operator_literal_json_pointer.md
      - 'ordered_json': api/ordered_json.md
      - 'ordered_map': api/ordered_map.md
      - macros:
          - 'Overview': api/macros/index.md
          - 'JSON_ASSERT': api/macros/json_assert.md
          - 'JSON_BRACE_INIT_COPY_SEMANTICS': api/macros/json_brace_init_copy_semantics.md
          - 'JSON_CATCH_USER, JSON_THROW_USER, JSON_TRY_USER': api/macros/json_throw_user.md
          - 'JSON_DIAGNOSTICS': api/macros/json_diagnostics.md
          - 'JSON_DIAGNOSTIC_POSITIONS': api/macros/json_diagnostic_positions.md
          - 'JSON_DISABLE_ENUM_SERIALIZATION': api/macros/json_disable_enum_serialization.md
          - 'JSON_HAS_CPP_11, JSON_HAS_CPP_14, JSON_HAS_CPP_17, JSON_HAS_CPP_20': api/macros/json_has_cpp_11.md
          - 'JSON_HAS_EXPERIMENTAL_FILESYSTEM, JSON_HAS_FILESYSTEM': api/macros/json_has_filesystem.md
          - 'JSON_HAS_RANGES': api/macros/json_has_ranges.md
          - 'JSON_HAS_STATIC_RTTI': api/macros/json_has_static_rtti.md
          - 'JSON_HAS_STD_FORMAT': api/macros/json_has_std_format.md
          - 'JSON_HAS_THREE_WAY_COMPARISON': api/macros/json_has_three_way_comparison.md
          - 'JSON_NOEXCEPTION': api/macros/json_noexception.md
          - 'JSON_NO_IO': api/macros/json_no_io.md
          - 'JSON_SKIP_LIBRARY_VERSION_CHECK': api/macros/json_skip_library_version_check.md
          - 'JSON_SKIP_UNSUPPORTED_COMPILER_CHECK': api/macros/json_skip_unsupported_compiler_check.md
          - 'JSON_USE_GLOBAL_UDLS': api/macros/json_use_global_udls.md
          - 'JSON_USE_IMPLICIT_CONVERSIONS': api/macros/json_use_implicit_conversions.md
          - 'JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON': api/macros/json_use_legacy_discarded_value_comparison.md
          - 'NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE': api/macros/nlohmann_define_derived_type.md
          - 'NLOHMANN_DEFINE_TYPE_INTRUSIVE, NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE': api/macros/nlohmann_define_type_intrusive.md
          - 'NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE': api/macros/nlohmann_define_type_non_intrusive.md
          - 'NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_WITH_DEFAULT_WITH_NAMES, NLOHMANN_DEFINE_DERIVED_TYPE_NON_INTRUSIVE_ONLY_SERIALIZE_WITH_NAMES': api/macros/nlohmann_define_type_with_names.md
          - 'NLOHMANN_JSON_NAMESPACE': api/macros/nlohmann_json_namespace.md
          - 'NLOHMANN_JSON_NAMESPACE_BEGIN, NLOHMANN_JSON_NAMESPACE_END': api/macros/nlohmann_json_namespace_begin.md
          - 'NLOHMANN_JSON_NAMESPACE_NO_VERSION': api/macros/nlohmann_json_namespace_no_version.md
          - 'NLOHMANN_JSON_SERIALIZE_ENUM': api/macros/nlohmann_json_serialize_enum.md
          - 'NLOHMANN_JSON_SERIALIZE_ENUM_STRICT': api/macros/nlohmann_json_serialize_enum_strict.md
          - 'NLOHMANN_JSON_VERSION_MAJOR, NLOHMANN_JSON_VERSION_MINOR, NLOHMANN_JSON_VERSION_PATCH': api/macros/nlohmann_json_version_major.md
  - Community:
      - community/index.md
      - "Code of Conduct": community/code_of_conduct.md
      - community/contribution_guidelines.md
      - community/quality_assurance.md
      - community/governance.md
      - community/security_policy.md

# Extras
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      link: https://www.xing.com/profile/Niels_Lohmann
    - icon: fontawesome/brands/paypal
      link: https://www.paypal.me/nlohmann
  generator: false

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        JSON for Modern C++ is a C++11 header-only library implementing a JSON
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