diff --git a/app/main/views/platform_admin.py b/app/main/views/platform_admin.py
index 1029bba3c..e40e33f15 100644
--- a/app/main/views/platform_admin.py
+++ b/app/main/views/platform_admin.py
@@ -253,20 +253,41 @@ def platform_admin_returned_letters():
 @login_required
 @user_is_platform_admin
 def platform_admin_letter_validation_preview():
+    return letter_validation_preview(from_platform_admin=True)
+
+
+@main.route("/services/<service_id>/letter-validation-preview", methods=["GET", "POST"])
+@login_required
+def service_letter_validation_preview(service_id):
+    return letter_validation_preview(from_platform_admin=False)
+
+
+def letter_validation_preview(from_platform_admin):
     message, pages, result = None, [], None
     form = PDFUploadForm()
 
+    view_location = 'views/platform-admin/letter-validation-preview.html' \
+        if from_platform_admin else'views/letter-validation-preview.html'
+
     if form.validate_on_submit():
         pdf_file = form.file.data
         virus_free = antivirus_client.scan(pdf_file)
 
         if not virus_free:
             return render_template(
-                'views/platform-admin/letter-validation-preview.html',
+                view_location,
                 form=form, message="Document didn't pass the virus scan", pages=pages, result=result
             ), 400
 
         try:
+            if len(pdf_file.read()) > (2 * 1024 * 1024):
+                return render_template(
+                    view_location,
+                    form=form,
+                    message="File must be less than 2MB",
+                    pages=pages, result=result
+                ), 400
+            pdf_file.seek(0)
             response = validate_letter(pdf_file)
             response.raise_for_status()
             if response.status_code == 200:
@@ -275,14 +296,14 @@ def platform_admin_letter_validation_preview():
             if error.response and error.response.status_code == 400:
                 message = "Something was wrong with the file you tried to upload. Please upload a valid PDF file."
                 return render_template(
-                    'views/platform-admin/letter-validation-preview.html',
+                    view_location,
                     form=form, message=message, pages=pages, result=result
                 ), 400
             else:
                 raise error
 
     return render_template(
-        'views/platform-admin/letter-validation-preview.html',
+        view_location,
         form=form, message=message, pages=pages, result=result
     )
 
diff --git a/app/navigation.py b/app/navigation.py
index 512c568f5..fd6f18711 100644
--- a/app/navigation.py
+++ b/app/navigation.py
@@ -233,6 +233,7 @@ class HeaderNavigation(Navigation):
         'service_edit_sms_sender',
         'service_email_reply_to',
         'service_letter_contact_details',
+        'service_letter_validation_preview',
         'service_name_change',
         'service_name_change_confirm',
         'service_preview_email_branding',
@@ -487,6 +488,7 @@ class MainNavigation(Navigation):
         'service_dashboard_updates',
         'service_delete_email_reply_to',
         'service_delete_sms_sender',
+        'service_letter_validation_preview',
         'service_switch_can_upload_document',
         'service_switch_live',
         'service_set_permission',
@@ -701,6 +703,7 @@ class CaseworkNavigation(Navigation):
         'service_edit_sms_sender',
         'service_email_reply_to',
         'service_letter_contact_details',
+        'service_letter_validation_preview',
         'service_name_change',
         'service_name_change_confirm',
         'service_preview_email_branding',
@@ -940,6 +943,7 @@ class OrgNavigation(Navigation):
         'service_edit_sms_sender',
         'service_email_reply_to',
         'service_letter_contact_details',
+        'service_letter_validation_preview',
         'service_name_change',
         'service_name_change_confirm',
         'service_preview_email_branding',
diff --git a/app/templates/views/letter-validation-preview.html b/app/templates/views/letter-validation-preview.html
new file mode 100644
index 000000000..dd9e50740
--- /dev/null
+++ b/app/templates/views/letter-validation-preview.html
@@ -0,0 +1,57 @@
+{% extends "withnav_template.html" %}
+{% from "components/banner.html" import banner %}
+{% from "components/textbox.html" import textbox %}
+{% from "components/file-upload.html" import file_upload %}
+{% from "components/page-footer.html" import page_footer %}
+
+{% from "components/form.html" import form_wrapper %}
+
+{% block service_page_title %}
+  Letter validation preview
+{% endblock %}
+
+{% block maincolumn_content %}
+
+<div class="grid-row">
+  <div class="column-whole">
+    {% if result %}
+      {{ banner(message, with_tick=True) }}
+    {% elif message %}
+      {{ banner(message, 'dangerous')}}
+    {% endif %}
+
+      <h1 class="heading-large">Letter validation preview</h1>
+    <div class="bottom-gutter">
+     {{ file_upload(
+          form.file,
+          action = url_for('main.service_letter_validation_preview', service_id=current_service.id),
+          button_text='Choose a file',
+      )}}
+    </div>
+      {%if not pages %}
+        <div>
+        <h1 class="heading-medium">Check your file meets the letter specification </h1>
+        <p>Your file must be:
+        <li>a PDF</li>
+        <li>no more than 10 pages long</li>
+        <li>less than 2 MB</li>
+        </p>
+        <p>The content of your letter mut appear inside the printable area.</p>
+        <p>
+        <a href="https://docs.notifications.service.gov.uk/documentation/images/notify-pdf-letter-spec-v2.3.pdf">
+            Download the letter specification</a> for more information.
+        </p>
+        </div>
+    {% endif%}
+  </div>
+  <div class="column-whole template-container" >
+
+    {% for page in pages %}
+    <div class="letter">
+      <img src="data:image/png;base64,{{ page }}">
+    </div>
+    {% endfor %}
+  </div>
+</div>
+
+{% endblock %}
diff --git a/tests/app/main/views/test_platform_admin.py b/tests/app/main/views/test_platform_admin.py
index 7fba52400..87a0f90b9 100644
--- a/tests/app/main/views/test_platform_admin.py
+++ b/tests/app/main/views/test_platform_admin.py
@@ -761,6 +761,36 @@ def test_platform_admin_submit_empty_returned_letters(mocker, client, platform_a
     assert "Can’t be empty" in response.get_data(as_text=True)
 
 
+def test_service_letter_validation_preview_renders_correctly(
+        client_request,
+        mock_has_no_jobs
+
+):
+    page = client_request.get('main.service_letter_validation_preview', service_id="service_1")
+
+    assert page.find('h1').text.strip() == "Letter validation preview"
+    assert page.find_all('input', class_='file-upload-field')
+
+
+def test_service_letter_validation_preview_returns_400_if_file_is_too_big(
+        client_request,
+        mock_has_no_jobs,
+        mocker
+
+):
+    with open('tests/test_pdf_files/big.pdf', 'rb') as file:
+        page = client_request.post('main.service_letter_validation_preview', service_id="service_1",
+                                   _data=dict(
+                                       pdf_file=file,
+                                   ),
+                                   content_type='multipart/form-data',
+                                   _follow_redirects=True)
+
+    assert page.find('h1').text.strip() == "Letter validation preview"
+    assert page.find_all('input', class_='file-upload-field')
+    page.find('span', class_='error-message').text.strip() == "File must be less than 2MB"
+
+
 def test_letter_validation_preview_renders_correctly(mocker, client, platform_admin_user):
     mock_get_user(mocker, user=platform_admin_user)
     client.login(platform_admin_user)
diff --git a/tests/test_pdf_files/big.pdf b/tests/test_pdf_files/big.pdf
new file mode 100644
index 000000000..b617f9a98
Binary files /dev/null and b/tests/test_pdf_files/big.pdf differ