diff --git a/Gemfile b/Gemfile
index 191cc9a..5b6b4f9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -52,6 +52,9 @@ gem "bootsnap", require: false
 
 gem "dsfr-view-components"
 
+# Mon Devis Sans Oublis custom gems
+gem "pdf-reader"
+
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
   gem "debug", platforms: %i[mri mingw x64_mingw]
diff --git a/Gemfile.lock b/Gemfile.lock
index 62021dc..e8f53a6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    Ascii85 (2.0.1)
     actioncable (7.2.2)
       actionpack (= 7.2.2)
       activesupport (= 7.2.2)
@@ -74,6 +75,7 @@ GEM
       tzinfo (~> 2.0, >= 2.0.5)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
+    afm (0.2.2)
     ast (2.4.2)
     base64 (0.2.0)
     benchmark (0.3.0)
@@ -165,6 +167,7 @@ GEM
       guard (~> 2.1)
       guard-compat (~> 1.1)
       rspec (>= 2.99.0, < 4.0)
+    hashery (2.1.2)
     html-attributes-utils (1.0.2)
       activesupport (>= 6.1.4.4)
     i18n (1.14.6)
@@ -227,6 +230,12 @@ GEM
     parser (3.3.6.0)
       ast (~> 2.4.1)
       racc
+    pdf-reader (2.13.0)
+      Ascii85 (>= 1.0, < 3.0, != 2.0.0)
+      afm (~> 0.2.1)
+      hashery (~> 2.0)
+      ruby-rc4
+      ttfunk
     pg (1.5.9)
     pry (0.14.2)
       coderay (~> 1.1)
@@ -332,6 +341,7 @@ GEM
       rubocop (~> 1.61)
       rubocop-rspec (~> 3, >= 3.0.1)
     ruby-progressbar (1.13.0)
+    ruby-rc4 (0.1.5)
     securerandom (0.3.1)
     sentry-rails (5.21.0)
       railties (>= 5.0)
@@ -354,6 +364,8 @@ GEM
       ffi (~> 1.1)
     thor (1.3.2)
     timeout (0.4.2)
+    ttfunk (1.8.0)
+      bigdecimal (~> 3.1)
     turbo-rails (2.0.11)
       actionpack (>= 6.0.0)
       railties (>= 6.0.0)
@@ -397,6 +409,7 @@ DEPENDENCIES
   guard-rspec
   importmap-rails
   jbuilder
+  pdf-reader
   pg
   puma (~> 6.0)
   rails
diff --git a/app/controllers/quotes_controller.rb b/app/controllers/quotes_controller.rb
index 5fbe0b1..56170e6 100644
--- a/app/controllers/quotes_controller.rb
+++ b/app/controllers/quotes_controller.rb
@@ -3,13 +3,36 @@
 # Controller for the Quotes resource
 class QuotesController < ApplicationController
   def check
-    @quote_attributes ||= {
-      siret: nil
+    @quote_attributes = if params[:quote_file].present?
+                          file_to_attributes(params[:quote_file])
+                        else
+                          default_quote_attributes
+                        end
+    return unless @quote_attributes
+
+    quote_validation(@quote_attributes)
+  rescue QuoteReader::ReadError => e
+    @quote_errors = [e.message]
+  end
+
+  protected
+
+  def default_quote_attributes
+    {
+      quote_number: nil,
+      rge_number: nil,
+      siret_number: nil
     }
+  end
 
-    return unless @quote_attributes
+  def file_to_attributes(uploaded_file)
+    temp_file_path = uploaded_file.tempfile.path
+
+    QuoteReader.new(temp_file_path).read_attributes
+  end
 
-    quote_validation = QuoteValidator.new(@quote_attributes)
+  def quote_validation(quote_attributes)
+    quote_validation = QuoteValidator.new(quote_attributes)
     quote_validation.validate!
 
     @quote_valid = quote_validation.valid?
diff --git a/app/views/quotes/check.html.erb b/app/views/quotes/check.html.erb
index 30e7970..10462ef 100644
--- a/app/views/quotes/check.html.erb
+++ b/app/views/quotes/check.html.erb
@@ -3,7 +3,7 @@
 <h1>Fichier du Devis :</h1>
 <%= form_tag check_quotes_path, multipart: true do %>
   <%= file_field_tag :quote_file %>
-  <%= submit_tag "Check" %>
+  <%= submit_tag "Vérifier", class: "fr-btn fr-btn--primary fr-btn--lg" %>
 <% end %>
 
 <% if defined?(@quote_valid) %>
diff --git a/lib/quote_reader.rb b/lib/quote_reader.rb
new file mode 100644
index 0000000..4da8129
--- /dev/null
+++ b/lib/quote_reader.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require "pdf-reader"
+
+# Read Quote from PDF file to extract Quote attributes
+class QuoteReader
+  class ReadError < StandardError; end
+
+  attr_reader :filepath, :quote_text
+
+  def initialize(filepath)
+    @filepath = filepath
+  end
+
+  def read_attributes
+    @quote_text = extract_text_from_pdf(filepath)
+
+    {
+      quote_number: find_quote_number(quote_text),
+      rge_number: find_rge_number(quote_text),
+      siret_number: find_siret_number(quote_text),
+
+      full_text: quote_text
+    }
+  rescue PDF::Reader::MalformedPDFError, PDF::Reader::UnsupportedFeatureError,
+         StandardError
+    raise parse_error(error)
+  end
+
+  private
+
+  def parse_error(error)
+    error_message = case error
+                    when PDF::Reader::MalformedPDFError
+                      "Failed to parse PDF: The file may be corrupted."
+                    when PDF::Reader::UnsupportedFeatureError
+                      "Failed to parse PDF: An unsupported feature was used in the PDF."
+                    when StandardError
+                      "An error occurred: #{e.message}"
+                    end
+
+    ReadError.new(error_message)
+  end
+
+  def find_quote_number(text)
+    text[/DEVIS\s+N°\s*(\d+)/i, 1] if text
+  end
+
+  def find_rge_number(text)
+    text[/RGE\s+N°\s*(\d+)/i, 1] if text
+  end
+
+  def find_siret_number(text)
+    text[/SIRET\s*:\s*(\d{3}\s*\d{3}\s*\d{3}\s*\d{5})/i, 1]&.gsub(/\s/, "") if text
+  end
+
+  def extract_text_from_pdf(pdf_path)
+    reader = PDF::Reader.new(pdf_path)
+    text = reader.pages.map(&:text)
+
+    text.join("\n") # Join all pages text into a single string, separated by new lines
+  end
+end
diff --git a/lib/quote_validator.rb b/lib/quote_validator.rb
index 6822f5c..a00fb5b 100644
--- a/lib/quote_validator.rb
+++ b/lib/quote_validator.rb
@@ -14,7 +14,7 @@ def initialize(quote)
   def validate!
     @errors = []
 
-    @errors << "SIRET number is missing" if @quote[:siret].blank?
+    @errors << "SIRET number is missing" if @quote[:siret_number].blank?
 
     valid?
   end