Set up SourceTag with Instapage

Instapage’s landing page builder includes a form editor that supports hidden fields. You add one hidden field per SourceTag data point and set the field name to match.

What you need

• SourceTag installed on your Instapage landing page (added via Instapage’s JavaScript settings)
• An Instapage landing page with a form

Step 1: Add SourceTag to your Instapage page

1. In the Instapage page builder, go to Settings > JavaScript (or Custom Code)
2. In the Head section, paste your SourceTag script tag
3. Save

Step 2: Open the form in the Instapage editor

1. In the Instapage builder, click on your form element to select it
2. Click Edit Form Fields (or double-click the form)

Step 3: Add hidden fields

1. Click Add Field (the ”+” button)
2. Set the field type to Hidden
3. Set the Field Name to the SourceTag field name (e.g. st_fc_channel)
4. Leave the default value empty
5. Repeat for each field

Core fields (add these)

• st_fc_channel
• st_fc_detail_1
• st_fc_detail_2
• st_fc_detail_3
• st_fc_detail_4
• st_lc_channel
• st_lc_detail_1
• st_lc_detail_2
• st_lc_detail_3
• st_lc_detail_4
• st_fc_landing_page
• st_lc_landing_page

Optional extended fields

If you have enabled extended field groups in your SourceTag dashboard, also add:

• st_fc_click_id and st_lc_click_id (click IDs)
• st_visits (visit count)
• st_days_to_convert (days since first visit)
• st_device (device type)

See Captured Fields for the full list of available fields.

Step 4: Verify field names

Click on each hidden field and check the field name in the properties panel. The name must match the SourceTag field name exactly, including case and underscores.

Step 5: Publish and test

Publish your Instapage page. Visit it with UTM parameters:

?utm_source=test&utm_medium=cpc&utm_campaign=instapage-test

Submit the form. Check the lead in Instapage’s Analytics > Leads section. The hidden field values should appear alongside the visible field data.

Tips

• You can copy field names from the Fields page in your SourceTag dashboard (each name has a copy button).
• Instapage includes hidden field data in all integrations (webhooks, email notifications, CRM connections).
• If you are using Instapage’s built-in A/B testing, add the hidden fields to all page variations.
• Instapage also has its own UTM tracking. SourceTag’s hidden fields provide the full attribution picture (first-click, last-click, visit count, etc.) which goes further than basic UTM passthrough.