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Customizing with CSS Editor: A Complete Guide to Squarespace Styling
The CSS Editor in Squarespace allows you to customize your site's appearance beyond built-in options through custom CSS code. This tool is primarily for modifying fonts, colors, and backgrounds.
Using the CSS Editor:
- Open the custom CSS panel
- Click "Open in a new window" for a larger view (optional)
- Add your code
- Click Save to publish changes
Note: The syntax checker will flag any code that may not work correctly across browsers. Line numbers help navigate your code, and syntax errors appear in red at the bottom.
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Error message with yellow arrow
Custom Files Feature:
- Click "Custom Files" or "Manage Custom Files"
- Upload images or fonts by clicking "Add Images or Fonts" or drag-and-drop
- Supported formats:
- Images: .jpg, .png, .gif
- Fonts: .ttf, .otf, .woff
- Note: .svg files are not supported
Using Custom Files in Code:
- Place cursor where you want the file URL
- Click the file from Custom Files
- URL automatically pastes into your code

Yellow arrow indicating a JPG file
Important Considerations:
- Custom CSS doesn't transfer between templates in version 7.0
- When changing SSL settings, update file URLs accordingly (http/https)
- Limit CSS modifications to fonts, colors, and backgrounds to maintain site stability
- For complex customizations, consider Premium and Enterprise plans
Remember to check the syntax and test your changes before publishing to ensure everything works as intended.
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