diff --git a/app/assets/stylesheets/code_blocks.scss b/app/assets/stylesheets/code_blocks.scss
new file mode 100644
index 000000000..cfae3c2b5
--- /dev/null
+++ b/app/assets/stylesheets/code_blocks.scss
@@ -0,0 +1,13 @@
+@import "colors";
+
+.code-block {
+  background-color: $black;
+  color: $white;
+  border-radius: 3px;
+  padding: 2rem;
+  display: flex;
+  align-items: center;
+  font-weight: bold;
+  justify-content: center;
+  overflow: auto;
+}
diff --git a/app/assets/stylesheets/confirmations.scss b/app/assets/stylesheets/confirmations.scss
index 2936770e0..b028d4419 100644
--- a/app/assets/stylesheets/confirmations.scss
+++ b/app/assets/stylesheets/confirmations.scss
@@ -37,6 +37,7 @@
   }
 
   .confirmation-resend {
+
     p,
     label {
       margin-bottom: $default-padding;
diff --git a/app/controllers/prefill_descriptions_controller.rb b/app/controllers/prefill_descriptions_controller.rb
new file mode 100644
index 000000000..801a7753c
--- /dev/null
+++ b/app/controllers/prefill_descriptions_controller.rb
@@ -0,0 +1,32 @@
+class PrefillDescriptionsController < ApplicationController
+  before_action :retrieve_procedure
+  before_action :set_prefill_description
+
+  def edit
+  end
+
+  def update
+    @prefill_description.update(prefill_description_params)
+
+    respond_to do |format|
+      format.turbo_stream
+      format.html { render :edit }
+    end
+  end
+
+  private
+
+  def retrieve_procedure
+    @procedure = Procedure.publiees_ou_brouillons.opendata.find_by!(path: params[:path])
+  end
+
+  def set_prefill_description
+    @prefill_description = PrefillDescription.new(@procedure)
+  end
+
+  def prefill_description_params
+    params.require(:procedure).permit(selected_type_de_champ_ids: [])
+  rescue ActionController::ParameterMissing
+    { selected_type_de_champ_ids: [] }
+  end
+end
diff --git a/app/models/champ.rb b/app/models/champ.rb
index 5b9f0b4e6..1833f5cde 100644
--- a/app/models/champ.rb
+++ b/app/models/champ.rb
@@ -66,6 +66,7 @@ class Champ < ApplicationRecord
     :carte?,
     :stable_id,
     :mandatory?,
+    :prefillable?,
     to: :type_de_champ
 
   scope :updated_since?, -> (date) { where('champs.updated_at > ?', date) }
diff --git a/app/models/prefill_description.rb b/app/models/prefill_description.rb
new file mode 100644
index 000000000..255ad3adb
--- /dev/null
+++ b/app/models/prefill_description.rb
@@ -0,0 +1,46 @@
+class PrefillDescription < SimpleDelegator
+  include Rails.application.routes.url_helpers
+
+  MAX_PREFILL_LINK_LENGTH = 2000
+
+  attr_reader :selected_type_de_champ_ids
+
+  def initialize(procedure)
+    super(procedure)
+    @selected_type_de_champ_ids = []
+  end
+
+  def update(attributes)
+    @selected_type_de_champ_ids = attributes[:selected_type_de_champ_ids].presence || []
+  end
+
+  def types_de_champ
+    active_revision.types_de_champ_public
+  end
+
+  def include?(type_de_champ_id)
+    selected_type_de_champ_ids.include?(type_de_champ_id.to_s)
+  end
+
+  def link_too_long?
+    prefill_link.length > MAX_PREFILL_LINK_LENGTH
+  end
+
+  def prefill_link
+    @prefill_link ||= commencer_url({ path: path }.merge(prefilled_champs_for_link))
+  end
+
+  def prefilled_champs
+    @prefilled_champs ||= types_de_champ.where(id: selected_type_de_champ_ids)
+  end
+
+  private
+
+  def prefilled_champs_for_link
+    prefilled_champs.map { |type_de_champ| ["champ_#{type_de_champ.to_typed_id}", type_de_champ.libelle] }.to_h
+  end
+
+  def prefilled_champs_for_query
+    prefilled_champs.map { |type_de_champ| "\"champ_#{type_de_champ.to_typed_id}\": \"#{type_de_champ.libelle}\"" } .join(', ')
+  end
+end
diff --git a/app/models/prefill_params.rb b/app/models/prefill_params.rb
index 8e94828c8..d536deed5 100644
--- a/app/models/prefill_params.rb
+++ b/app/models/prefill_params.rb
@@ -31,16 +31,6 @@ class PrefillParams
   end
 
   class PrefillValue
-    AUTHORIZED_TYPES_DE_CHAMPS = [
-      TypeDeChamp.type_champs.fetch(:text),
-      TypeDeChamp.type_champs.fetch(:textarea),
-      TypeDeChamp.type_champs.fetch(:decimal_number),
-      TypeDeChamp.type_champs.fetch(:integer_number),
-      TypeDeChamp.type_champs.fetch(:email),
-      TypeDeChamp.type_champs.fetch(:phone),
-      TypeDeChamp.type_champs.fetch(:iban)
-    ]
-
     NEED_VALIDATION_TYPES_DE_CHAMPS = [
       TypeDeChamp.type_champs.fetch(:decimal_number),
       TypeDeChamp.type_champs.fetch(:integer_number)
@@ -54,7 +44,7 @@ class PrefillParams
     end
 
     def prefillable?
-      authorized? && valid?
+      champ.prefillable? && valid?
     end
 
     def to_h
@@ -66,10 +56,6 @@ class PrefillParams
 
     private
 
-    def authorized?
-      AUTHORIZED_TYPES_DE_CHAMPS.include?(champ.type_champ)
-    end
-
     def valid?
       return true unless NEED_VALIDATION_TYPES_DE_CHAMPS.include?(champ.type_champ)
 
diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index 708b6bf4d..ede8d11bc 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -204,15 +204,16 @@ class Procedure < ApplicationRecord
   has_one_attached :notice
   has_one_attached :deliberation
 
-  scope :brouillons,            -> { where(aasm_state: :brouillon) }
-  scope :publiees,              -> { where(aasm_state: :publiee) }
-  scope :closes,                -> { where(aasm_state: [:close, :depubliee]) }
-  scope :opendata,              -> { where(opendata: true) }
-  scope :publiees_ou_closes,    -> { where(aasm_state: [:publiee, :close, :depubliee]) }
-  scope :by_libelle,            -> { order(libelle: :asc) }
-  scope :created_during,        -> (range) { where(created_at: range) }
-  scope :cloned_from_library,   -> { where(cloned_from_library: true) }
-  scope :declarative,           -> { where.not(declarative_with_state: nil) }
+  scope :brouillons,             -> { where(aasm_state: :brouillon) }
+  scope :publiees,               -> { where(aasm_state: :publiee) }
+  scope :publiees_ou_brouillons, -> { publiees.or(brouillons) }
+  scope :closes,                 -> { where(aasm_state: [:close, :depubliee]) }
+  scope :opendata,               -> { where(opendata: true) }
+  scope :publiees_ou_closes,     -> { where(aasm_state: [:publiee, :close, :depubliee]) }
+  scope :by_libelle,             -> { order(libelle: :asc) }
+  scope :created_during,         -> (range) { where(created_at: range) }
+  scope :cloned_from_library,    -> { where(cloned_from_library: true) }
+  scope :declarative,            -> { where.not(declarative_with_state: nil) }
 
   scope :discarded_expired, -> do
     with_discarded
diff --git a/app/models/type_de_champ.rb b/app/models/type_de_champ.rb
index 6f5c1b478..774dd9e50 100644
--- a/app/models/type_de_champ.rb
+++ b/app/models/type_de_champ.rb
@@ -251,6 +251,18 @@ class TypeDeChamp < ApplicationRecord
     collapsible_explanation_enabled == "1"
   end
 
+  def prefillable?
+    type_champ.in?([
+      TypeDeChamp.type_champs.fetch(:text),
+      TypeDeChamp.type_champs.fetch(:textarea),
+      TypeDeChamp.type_champs.fetch(:decimal_number),
+      TypeDeChamp.type_champs.fetch(:integer_number),
+      TypeDeChamp.type_champs.fetch(:email),
+      TypeDeChamp.type_champs.fetch(:phone),
+      TypeDeChamp.type_champs.fetch(:iban)
+    ])
+  end
+
   def fillable?
     !non_fillable?
   end
diff --git a/app/views/prefill_descriptions/_prefill_link.html.haml b/app/views/prefill_descriptions/_prefill_link.html.haml
new file mode 100644
index 000000000..07a0f2811
--- /dev/null
+++ b/app/views/prefill_descriptions/_prefill_link.html.haml
@@ -0,0 +1,15 @@
+= turbo_frame_tag "#{dom_id(prefill_description)}_url" do
+  - theme = prefill_description.link_too_long? ? :warning : :success
+  - icon = prefill_description.link_too_long? ? "fr-icon-warning-fill" : "fr-icon-paint-fill"
+  - body = prefill_description.link_too_long? ? t("views.prefill_descriptions.edit.prefill_link_too_long") : t("views.prefill_descriptions.edit.prefill_link_info")
+
+  - if prefill_description.prefilled_champs.any?
+    = render Dsfr::CalloutComponent.new(title: t("views.prefill_descriptions.edit.prefill_link_title"), theme: theme, icon: icon) do |c|
+      - c.with_body do
+        = body
+        %pre
+          %code.code-block
+            = prefill_description.prefill_link
+      - unless prefill_description.link_too_long?
+        - c.with_bottom do
+          = render Dsfr::CopyButtonComponent.new(title: t("views.prefill_descriptions.edit.prefill_link_copy"), text: prefill_description.prefill_link)
diff --git a/app/views/prefill_descriptions/_types_de_champs.html.haml b/app/views/prefill_descriptions/_types_de_champs.html.haml
new file mode 100644
index 000000000..6c877878d
--- /dev/null
+++ b/app/views/prefill_descriptions/_types_de_champs.html.haml
@@ -0,0 +1,44 @@
+= turbo_frame_tag "#{dom_id(@prefill_description)}_types_de_champs" do
+  .card
+    .card-title
+      %span.icon.edit
+      = t("views.prefill_descriptions.edit.champs_title")
+
+    %table.table.hoverable
+      %thead
+        %tr
+          %th
+            = t("views.prefill_descriptions.edit.champ_id")
+          %th
+            = t("views.prefill_descriptions.edit.champ_type")
+          %th
+            = t("views.prefill_descriptions.edit.champ_libelle")
+          %th
+            = t("views.prefill_descriptions.edit.champ_description")
+          %th
+            = t("views.prefill_descriptions.edit.champ_prefill")
+
+      %tbody
+        - prefill_description.types_de_champ.each do |type_de_champ|
+          %tr
+            %td
+              = type_de_champ.to_typed_id
+            %td
+              = t("activerecord.attributes.type_de_champ.type_champs.#{type_de_champ.type_champ}")
+            %td
+              = type_de_champ.libelle
+            %td
+              = type_de_champ.description
+            %td.text-center
+              = form_for prefill_description, url: prefill_description_path(prefill_description.path), data: { turbo: true } do |f|
+                - if prefill_description.include?(type_de_champ.id)
+                  - (prefill_description.selected_type_de_champ_ids - [type_de_champ.id.to_s]).each do |id|
+                    = f.hidden_field :selected_type_de_champ_ids, value: id, multiple: true
+                  = f.submit t("views.prefill_descriptions.edit.champ_remove"), class: 'fr-btn fr-btn--secondary fr-btn--md'
+                - elsif type_de_champ.prefillable?
+                  - (prefill_description.selected_type_de_champ_ids + [type_de_champ.id.to_s]).each do |id|
+                    = f.hidden_field :selected_type_de_champ_ids, value: id, multiple: true
+                  = f.submit t("views.prefill_descriptions.edit.champ_add"), class: 'fr-btn fr-btn--md'
+                - else
+                  %button.fr-btn.fr-btn--secondary{ disabled: true }
+                    = t("views.prefill_descriptions.edit.champ_unavailable")
diff --git a/app/views/prefill_descriptions/edit.html.haml b/app/views/prefill_descriptions/edit.html.haml
new file mode 100644
index 000000000..48299b171
--- /dev/null
+++ b/app/views/prefill_descriptions/edit.html.haml
@@ -0,0 +1,19 @@
+- content_for(:title, @prefill_description.libelle)
+
+- content_for :footer do
+  = render partial: "root/footer"
+
+.container
+  .two-columns.procedure-context
+    .columns-container
+      .column.procedure-preview
+        = render partial: 'shared/procedure_description', locals: { procedure: @prefill_description }
+      .column.procedure-context-content
+        %p
+          = t("views.prefill_descriptions.edit.intro_html", libelle: @prefill_description.libelle)
+        %p
+          = t("views.prefill_descriptions.edit.info")
+
+  = render "types_de_champs", prefill_description: @prefill_description
+
+  = render "prefill_link", prefill_description: @prefill_description
diff --git a/app/views/prefill_descriptions/update.turbo_stream.haml b/app/views/prefill_descriptions/update.turbo_stream.haml
new file mode 100644
index 000000000..711bdeceb
--- /dev/null
+++ b/app/views/prefill_descriptions/update.turbo_stream.haml
@@ -0,0 +1,5 @@
+= turbo_stream.replace "#{dom_id(@prefill_description)}_types_de_champs" do
+  = render "types_de_champs", prefill_description: @prefill_description
+
+= turbo_stream.replace "#{dom_id(@prefill_description)}_url" do
+  = render "prefill_link", prefill_description: @prefill_description
diff --git a/config/locales/en.yml b/config/locales/en.yml
index a8968b54b..4d9bcc818 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -101,6 +101,23 @@ en:
         show_my_submitted_file: 'Show my submitted file'
         want_empty_pdf: "You prefer to submit a paper form? You can download an empty PDF file, and send it to the right administration : %{service} - %{adresse}"
         download_empty_pdf: 'Download an empty PDF file'
+    prefill_descriptions:
+      edit:
+        intro_html: "You'd like to allow your users to <strong>create a prefilled file</strong>, with data you already have, for the procedure « %{libelle} »."
+        info: Add the fields you want to prefill, thanks to the table below. Once it's over, copy the prefill link, replace the values and share the link.
+        champs_title: Fields
+        champ_id: ID
+        champ_type: Type
+        champ_libelle: Label
+        champ_description: Description
+        champ_prefill: Prefillable
+        champ_add: Add
+        champ_remove: Remove
+        champ_unavailable: Unavailable
+        prefill_link_title: Prefill link (GET)
+        prefill_link_info: Use the button to copy the link, then remplace the values with your data.
+        prefill_link_too_long: Warning, the prefill link is too long and may not work on all browsers.
+        prefill_link_copy: Copy prefill link
     registrations:
       new:
         title: "Create an account %{name}"
diff --git a/config/locales/fr.yml b/config/locales/fr.yml
index fe5867b28..1a30c82c6 100644
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -91,6 +91,23 @@ fr:
         show_my_submitted_file: 'Voir mon dossier déposé'
         want_empty_pdf: "Vous souhaitez effectuer une demande par papier ? Vous pouvez télécharger un dossier vide au format PDF, et l’envoyer à l’administration concernée : %{service} - %{adresse}"
         download_empty_pdf: 'Télécharger un dossier vide au format PDF'
+    prefill_descriptions:
+      edit:
+        intro_html: "Vous souhaitez permettre à vos usager·ères la <strong>création d'un dossier prérempli</strong>, à partir de données dont vous disposez déjà, pour la démarche « %{libelle} »."
+        info: Pour cela, ajoutez les champs que vous souhaitez préremplir, grâce au tableau ci-dessous. Lorsque vous avez terminé, il ne vous reste plus qu'à copier le lien de préremplissage, à remplacer les valeurs et à le partager.
+        champs_title: Champs de la démarche
+        champ_id: ID
+        champ_type: Type
+        champ_libelle: Libellé
+        champ_description: Description
+        champ_prefill: Préremplissable
+        champ_add: Ajouter
+        champ_remove: Retirer
+        champ_unavailable: Indisponible
+        prefill_link_title: Lien de préremplissage (GET)
+        prefill_link_info: Copiez le lien grâce au bouton ci-dessous et remplacez les valeurs par les données dont vous disposez.
+        prefill_link_too_long: Attention, ce lien de préremplissage est trop long et risque de ne pas fonctionner sur certains navigateurs.
+        prefill_link_copy: Copier le lien de préremplissage
     registrations:
       new:
         title: "Créez-vous un compte %{name}"
@@ -99,8 +116,6 @@ fr:
         wanna_say: 'Voulez-vous dire'
         password_label: "Mot de passe (%{min_length} caractères minimum)"
         password_placeholder: "%{min_length} caractères minimum"
-
-
     invites:
       dropdown:
         invite_to_edit: Inviter une personne à modifier ce dossier
diff --git a/config/routes.rb b/config/routes.rb
index bc7bc71b4..e762ae61b 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -189,6 +189,13 @@ Rails.application.routes.draw do
   post "webhooks/helpscout_support_dev", to: "webhook#helpscout_support_dev"
   match "webhooks/helpscout", to: lambda { |_| [204, {}, nil] }, via: :head
 
+  get '/preremplir/:path', to: 'prefill_descriptions#edit'
+  resources :procedures, only: [], param: :path do
+    member do
+      resource :prefill_description, only: :update
+    end
+  end
+
   #
   # Deprecated UI
   #
@@ -251,6 +258,12 @@ Rails.application.routes.draw do
     end
 
     resources :pays, only: :index
+
+    namespace :public do
+      namespace :v1 do
+        resources :dossiers, only: :create
+      end
+    end
   end
 
   #
diff --git a/spec/controllers/prefillings_controller_spec.rb b/spec/controllers/prefillings_controller_spec.rb
new file mode 100644
index 000000000..75e776a4e
--- /dev/null
+++ b/spec/controllers/prefillings_controller_spec.rb
@@ -0,0 +1,100 @@
+describe PrefillDescriptionsController, type: :controller do
+  describe '#edit' do
+    subject(:edit_request) do
+      get :edit, params: { path: procedure.path }
+    end
+
+    context 'when the procedure is found' do
+      context 'when the procedure is publiee' do
+        context 'when the procedure is opendata' do
+          let(:procedure) { create(:procedure, :published, opendata: true) }
+
+          it { expect(edit_request).to render_template(:edit) }
+        end
+
+        context 'when the procedure is not opendata' do
+          let(:procedure) { create(:procedure, :published, opendata: false) }
+
+          it { expect { edit_request }.to raise_error(ActiveRecord::RecordNotFound) }
+        end
+      end
+
+      context 'when the procedure is brouillon' do
+        context 'when the procedure is opendata' do
+          let(:procedure) { create(:procedure, :draft, opendata: true) }
+
+          it { expect(edit_request).to render_template(:edit) }
+        end
+
+        context 'when the procedure is not opendata' do
+          let(:procedure) { create(:procedure, :draft, opendata: false) }
+
+          it { expect { edit_request }.to raise_error(ActiveRecord::RecordNotFound) }
+        end
+      end
+
+      context 'when the procedure is not publiee and not brouillon' do
+        let(:procedure) { create(:procedure, :closed) }
+
+        it { expect { edit_request }.to raise_error(ActiveRecord::RecordNotFound) }
+      end
+    end
+
+    context 'when the procedure is not found' do
+      let(:procedure) { double(Procedure, path: "wrong path") }
+
+      it { expect { edit_request }.to raise_error(ActiveRecord::RecordNotFound) }
+    end
+  end
+
+  describe "#update" do
+    render_views
+
+    let(:procedure) { create(:procedure, :published, opendata: true) }
+    let(:type_de_champ) { create(:type_de_champ_text, procedure: procedure) }
+    let(:type_de_champ2) { create(:type_de_champ_text, procedure: procedure) }
+
+    subject(:update_request) do
+      patch :update, params: { path: procedure.path, procedure: params }, format: :turbo_stream
+    end
+
+    before { update_request }
+
+    context 'when adding a type_de_champ_id' do
+      let(:type_de_champ_to_add) { create(:type_de_champ_text, procedure: procedure) }
+      let(:params) { { selected_type_de_champ_ids: [type_de_champ.id, type_de_champ_to_add.id] } }
+
+      it { expect(response).to render_template(:update) }
+
+      it "includes the prefill URL" do
+        expect(response.body).to include(commencer_path(path: procedure.path))
+        expect(response.body).to include({ "champ_#{type_de_champ.to_typed_id}" => type_de_champ.libelle }.to_query)
+        expect(response.body).to include({ "champ_#{type_de_champ_to_add.to_typed_id}" => type_de_champ_to_add.libelle }.to_query)
+      end
+    end
+
+    context 'when removing a type_de_champ_id' do
+      let(:type_de_champ_to_remove) { type_de_champ2 }
+      let(:params) { { selected_type_de_champ_ids: [type_de_champ] } }
+
+      it { expect(response).to render_template(:update) }
+
+      it "includes the prefill URL" do
+        expect(response.body).to include(commencer_path(path: procedure.path))
+        expect(response.body).to include({ "champ_#{type_de_champ.to_typed_id}" => type_de_champ.libelle }.to_query)
+        expect(response.body).not_to include({ "champ_#{type_de_champ_to_remove.to_typed_id}" => type_de_champ_to_remove.libelle }.to_query)
+      end
+    end
+
+    context 'when removing the last type de champ' do
+      let(:type_de_champ_to_remove) { type_de_champ }
+      let(:params) { { selected_type_de_champ_ids: [] } }
+
+      it { expect(response).to render_template(:update) }
+
+      it "does not include the prefill URL" do
+        expect(response.body).not_to include(commencer_path(path: procedure.path))
+      end
+    end
+  end
+end
diff --git a/spec/factories/procedure.rb b/spec/factories/procedure.rb
index 380fa69ce..544029c75 100644
--- a/spec/factories/procedure.rb
+++ b/spec/factories/procedure.rb
@@ -279,6 +279,10 @@ FactoryBot.define do
       end
     end
 
+    trait :draft do
+      aasm_state { :brouillon }
+    end
+
     trait :published do
       aasm_state { :publiee }
       path { generate(:published_path) }
diff --git a/spec/models/prefill_description_spec.rb b/spec/models/prefill_description_spec.rb
new file mode 100644
index 000000000..630dc3290
--- /dev/null
+++ b/spec/models/prefill_description_spec.rb
@@ -0,0 +1,79 @@
+RSpec.describe PrefillDescription, type: :model do
+  include Rails.application.routes.url_helpers
+
+  describe '#update' do
+    let(:prefill_description) { described_class.new(build(:procedure)) }
+    let(:selected_type_de_champ_ids) { ["1", "2"] }
+    subject(:update) { prefill_description.update(attributes) }
+
+    context 'when selected_type_de_champ_ids are given' do
+      let(:attributes) { { selected_type_de_champ_ids: selected_type_de_champ_ids } }
+
+      it 'populate selected_type_de_champ_ids' do
+        expect { update }.to change { prefill_description.selected_type_de_champ_ids }.from([]).to(selected_type_de_champ_ids)
+      end
+    end
+  end
+
+  describe '#types_de_champ' do
+    let(:procedure) { create(:procedure) }
+    let(:type_de_champ) { create(:type_de_champ_text, procedure: procedure) }
+    let(:prefill_description) { described_class.new(procedure) }
+
+    it { expect(prefill_description.types_de_champ).to match([type_de_champ]) }
+  end
+
+  describe '#include?' do
+    let(:prefill_description) { described_class.new(build(:procedure)) }
+    let(:type_de_champ_id) { 1 }
+    subject(:included) { prefill_description.include?(type_de_champ_id) }
+
+    context 'when the id has been added to the prefill_description' do
+      before { prefill_description.update(selected_type_de_champ_ids: ["1"]) }
+
+      it { expect(included).to eq(true) }
+    end
+
+    context 'when the id has not be added to the prefill_description' do
+      it { expect(included).to eq(false) }
+    end
+  end
+
+  describe '#link_too_long?' do
+    let(:procedure) { create(:procedure) }
+    let(:prefill_description) { described_class.new(procedure) }
+
+    subject(:too_long) { prefill_description.link_too_long? }
+
+    before { prefill_description.update(selected_type_de_champ_ids: create_list(:type_de_champ_text, type_de_champs_count, procedure: procedure).map(&:id)) }
+
+    context 'when the prefill link is too long' do
+      let(:type_de_champs_count) { 60 }
+
+      it { expect(too_long).to eq(true) }
+    end
+
+    context 'when the prefill link is not too long' do
+      let(:type_de_champs_count) { 2 }
+
+      it { expect(too_long).to eq(false) }
+    end
+  end
+
+  describe '#prefill_link' do
+    let(:procedure) { create(:procedure) }
+    let(:type_de_champ) { create(:type_de_champ_text, procedure: procedure) }
+    let(:prefill_description) { described_class.new(procedure) }
+
+    before { prefill_description.update(selected_type_de_champ_ids: [type_de_champ.id]) }
+
+    it "builds the URL to create a new prefilled dossier" do
+      expect(prefill_description.prefill_link).to eq(
+        commencer_url(
+          path: procedure.path,
+          "champ_#{type_de_champ.to_typed_id}" => type_de_champ.libelle
+        )
+      )
+    end
+  end
+end
diff --git a/spec/models/type_de_champ_spec.rb b/spec/models/type_de_champ_spec.rb
index 2b96be0cb..9c57ce6d2 100644
--- a/spec/models/type_de_champ_spec.rb
+++ b/spec/models/type_de_champ_spec.rb
@@ -225,4 +225,51 @@ describe TypeDeChamp do
       expect(type_de_champ.condition).to eq(condition)
     end
   end
+
+  describe '#prefillable?' do
+    shared_examples 'a prefillable type de champ' do |factory|
+      it { expect(build(factory).prefillable?).to eq(true) }
+    end
+
+    shared_examples 'a non-prefillable type de champ' do |factory|
+      it { expect(build(factory).prefillable?).to eq(false) }
+    end
+
+    it_behaves_like "a prefillable type de champ", :type_de_champ_text
+    it_behaves_like "a prefillable type de champ", :type_de_champ_textarea
+    it_behaves_like "a prefillable type de champ", :type_de_champ_decimal_number
+    it_behaves_like "a prefillable type de champ", :type_de_champ_integer_number
+    it_behaves_like "a prefillable type de champ", :type_de_champ_email
+    it_behaves_like "a prefillable type de champ", :type_de_champ_phone
+    it_behaves_like "a prefillable type de champ", :type_de_champ_iban
+
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_number
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_communes
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_dossier_link
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_titre_identite
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_checkbox
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_civilite
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_yes_no
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_date
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_datetime
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_drop_down_list
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_multiple_drop_down_list
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_linked_drop_down_list
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_header_section
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_explication
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_piece_justificative
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_repetition
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_cnaf
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_dgfip
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_pole_emploi
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_mesri
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_carte
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_address
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_pays
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_regions
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_departements
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_siret
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_rna
+    it_behaves_like "a non-prefillable type de champ", :type_de_champ_annuaire_education
+  end
 end
diff --git a/spec/system/integrateurs/procedure_prefilling_spec.rb b/spec/system/integrateurs/procedure_prefilling_spec.rb
new file mode 100644
index 000000000..59cabefb3
--- /dev/null
+++ b/spec/system/integrateurs/procedure_prefilling_spec.rb
@@ -0,0 +1,21 @@
+describe 'As an integrator:', js: true do
+  let(:procedure) { create(:procedure, :published, opendata: true) }
+  let!(:type_de_champ) { create(:type_de_champ_text, procedure: procedure) }
+
+  before { visit "/preremplir/#{procedure.path}" }
+
+  scenario 'I can read the procedure prefilling (aka public champs)' do
+    expect(page).to have_content(type_de_champ.to_typed_id)
+    expect(page).to have_content(I18n.t("activerecord.attributes.type_de_champ.type_champs.#{type_de_champ.type_champ}"))
+    expect(page).to have_content(type_de_champ.libelle)
+    expect(page).to have_content(type_de_champ.description)
+  end
+
+  scenario 'I can select champs to prefill' do
+    click_on 'Ajouter'
+
+    prefill_description = PrefillDescription.new(procedure)
+    prefill_description.update(selected_type_de_champ_ids: [type_de_champ.id.to_s])
+    expect(page).to have_content(prefill_description.prefill_link)
+  end
+end