Unable to Use Inline CSS in HTML Page Pushed via Confluence REST API (v2)

[Florent Lambrette]

Hi,

I'm currently pushing fully-formed HTML content to Confluence Cloud using the v2 REST API, specifically in the storage representation.

However, I’ve noticed that any <style> tags or inline CSS declarations (e.g., <div style="...">) are either stripped out or ignored when the page is rendered in Confluence. This happens even when the content is well-formed and valid HTML.

My use case is to generate and upload formatted tables or reports, and I need consistent visual formatting — especially for things like tooltips and font styling.

Is there any documented limitation or workaround for including inline CSS in pages created/updated via the REST API?

Thanks in advance for your help!

[Lucas Knorr · Accepted solution]

Hi @Florent Lambrette

You can’t use arbitrary CSS styling in Confluence. Instead, Confluence has its own set of markup and styling options. You can find the documentation here — it should be the same for both Cloud and Data Center. 
I’d recommend manually creating a test page that includes all the styling options available in your Confluence instance (including any formatting features added by 3rd-party apps) and reverse-engineer the format from there. You can always inspect the storage format of that page, which is also the format used when creating pages via the REST API.

[Florent Lambrette]

Thank you @Lucas Knorr  ! it helped me