Runtime variables separate values that change from the HTML that rarely changes. A phone number, price label or announcement can be updated from the Dashboard without uploading the file again.
Use the exact variable syntax
Create a variable with a key that begins with pst5_, such as pst5_campaign_phone. Write that exact text directly in the HTML; braces are not needed.
<a href="tel:pst5_campaign_phone">pst5_campaign_phone</a>At render time every exact occurrence of the key is replaced with its value. Matching is literal, so check spelling and case when a value remains unchanged.
Publish step by step
- Create a key beginning with pst5_ in HTML Hosting Variables.
- Place the exact key in the HTML, attach the variable and test the rendered page.
Update it later
You can replace the uploaded file or GitHub source later. If the public page still shows an older version, use the page's Clean cache action and test again.
Important boundaries
Runtime variables are public page content, not secrets or server environment variables. Do not place passwords, tokens or private data in them.
Frequently asked questions
Do variable keys need braces?
Create a variable with a key that begins with pst5_, such as pst5_campaign_phone. Write that exact text directly in the HTML; braces are not needed.
Are all matching variable keys replaced?
At render time every exact occurrence of the key is replaced with its value. Matching is literal, so check spelling and case when a value remains unchanged.
Can I store secrets in a runtime variable?
Runtime variables are public page content, not secrets or server environment variables. Do not place passwords, tokens or private data in them.
Why is the old version still visible?
You can replace the uploaded file or GitHub source later. If the public page still shows an older version, use the page's Clean cache action and test again.
Continue through the HTML Hosting guides
These guides cover the same verified one-page hosting workflow from different angles.
- Read: How to Host an HTML Page Online with Posty5
- Read: How to Publish an HTML Page from GitHub
- Read: HTML Hosting Runtime Variables: Update Content Without Re-uploading
- Read: How to Host a Campaign Landing Page from One HTML File
- Read: Hosted HTML Page Not Showing? Causes and Fixes
- Read: HTML Hosting Form Submissions
