WebsiteDesignOutsource.com research
An Image Optimization Brief for Outsourced Web Teams
The decisions a team should record before preparing images for a production website.
Images affect performance, meaning, accessibility, and editorial quality. A useful brief identifies the purpose of each image before anyone chooses a file format or compression setting.
Record purpose and constraints
For each image, record role, subject, alternative text, crop behavior, maximum display size, source license, focal point, and fallback. Decorative images need a different treatment from informative images.
Validate in context
Check the largest and smallest layouts, slow loading, high-density displays, dark or light surfaces, and content management behavior. Confirm that the chosen asset is not merely small but still legible and meaningful.
Methodology
This note synthesizes web platform, accessibility, and performance documentation. It does not recommend a single universal format.
Key Stats
Key Takeaways
Sources
1. HTML images Image standard.
2. MDN responsive images Responsive guidance.
3. web.dev image performance Image lessons.
4. WCAG non-text content Alternative text.
5. Google image SEO Search guidance.
6. WebP Format documentation.
7. AVIF Format specification.
8. MDN lazy loading Loading behavior.
9. Creative Commons licenses Licensing reference.
10. W3C alt decision tree Alt-text decisions.
Further reading
Accessibility acceptance checklist
Related Research
Frequently asked questions
Should every image have alt text?
Every meaningful image needs an appropriate text alternative. Decorative images can use an empty alternative when implemented correctly.
Is the smallest file always best?
No. The right asset balances clarity, meaning, compatibility, and transfer cost.
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