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  • Governance

    • 0.1 Documented Policy
    • 0.2 Essential Tracking and Ads
  • UX / Design

    • 1.2 Rich Content
    • 1.3 Use of Images
    • 1.4 Awareness
    • 1.5 Data Transfer and Emissions
    • 1.6 Carbon Aware Design
    • 1.7 Colour Scheme
    • 1.8 User Retention
  • Images

    • 2.1 File Formats
    • 2.2 Image Optimisation
    • 2.3 Image Resolution
    • 2.4 Browser Cropping
  • Video

    • 3.1 Autoplay
    • 3.2 Script Loading
    • 3.3 Streaming Resolution
  • Content

    • 4.1 Content Audit
    • 4.2 Digital First
    • 4.3 Easy Access
    • 4.4 Descriptive Headings
  • Fonts

    • 5.1 Font Variations
    • 5.2 File Formats
    • 5.3 Clean Files
    • 5.4 System Fonts
  • Web Development

    • 6.1 Lazy Loading Images
    • 6.3 Modular Design
    • 6.4 Minification
    • 6.5 Templates
    • 6.6 Asset Loading
    • 6.7 Analytics
    • 6.8 Data Minimisation
    • 6.9 Stylesheet
    • 6.10 Text Compression
    • 6.11 Carbon Aware Development
  • Development Operations

    • 7.1 Bad Robots
    • 7.2 Dev Environments
    • 7.3 Dataset
    • 7.4 Site Architecture
    • 7.5 Caching
    • 7.6 Pipeline Code
    • 7.8 Green Hosting

5.3 Clean Files

All unnecessary characters are removed from font files.

Easy to implement
2
Low impact score

Introduction:

Font files can be further reduced in size by allowing it to only include the characters that you require. 

E.g. removing other language glyphs or flourishes if the design does not require them. 

Resource: CSS Tricks

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