A website can look slightly different across browsers because browsers may interpret certain HTML, CSS and JavaScript features differently. Differences in browser versions, fonts, screen sizes and device settings can also affect how a page is displayed.
1. Check the browser versions
Make sure you are testing current versions of the major browsers your visitors use.
An issue that appears in one browser may be caused by an older browser version rather than the website itself.
2. Check your CSS
Different browsers can handle unsupported or inconsistently implemented CSS features differently.
Review the CSS affecting the element that looks incorrect. Check whether the properties you are using are supported by the browsers you need to support.
3. Check fonts
If a particular font is unavailable or fails to load, the browser may use a fallback font. This can change text width, spacing and page layout.
Make sure your chosen web fonts are loading correctly and that appropriate fallback fonts are defined.
4. Check JavaScript and interactive features
Menus, forms, sliders and other interactive elements can behave differently if their JavaScript depends on browser-specific behaviour or unsupported features.
Use browser developer tools to identify JavaScript errors and check whether the affected feature relies on unsupported functionality.
5. Test responsive layouts
A difference between browsers may actually be caused by different screen sizes, zoom settings or device configurations.
Test the page at consistent viewport sizes and check both desktop and mobile layouts.
6. Use browser developer tools
When you find a difference, inspect the affected element using the browser’s developer tools.
Check:
- Applied CSS rules
- Computed styles
- Console errors
- Loaded fonts
- Network requests
- Unsupported or overridden properties
This can help identify the specific cause instead of changing the design randomly.
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