STM32 Web Interface Renders Differently Across Browsers

[johnackerman]

Hi,

I’m working on an STM32-based device that hosts a simple web UI for configuration via an embedded HTTP server.

The interface loads correctly in Chrome, but in Firefox, Safari, and some mobile browsers pages either render incorrectly or fail to load. The MCU shows no runtime errors, and files appear to be served correctly.

I’ve verified MIME types, disabled browser caching, and reduced HTML/CSS/JS to isolate the issue, but browser behavior still differs.

Has anyone experienced browser compatibility issues with STM32-hosted web interfaces?
Any advice on HTTP headers, buffer sizes, or embedded web UI best practices would be helpful.

Thanks,
John

[Andrew Neil]

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@johnackerman wrote:

Has anyone experienced browser compatibility issues with STM32-hosted web interfaces?

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It's not specific to STM32 - browser compatibility issues are a common issue across all platforms!

Try something like "html checking tools" in your favourite internet search engine or AI tool; eg,

https://www.google.com/search?q=html+checking+tools

which suggests that "html validation" may also be a good search...