What Is ETags?
ETags (Entity Tags) are HTTP response headers used for web caching and conditional requests. An ETag is a unique identifier assigned by the server to a specific version of a resource. When the resource changes, the ETag changes, allowing browsers and CDNs to validate cached content without re-downloading it.
What Are ETags?
ETags (Entity Tags) are HTTP response headers used for web caching and conditional requests. An ETag is a unique identifier assigned by the server to a specific version of a resource. When the resource changes, the ETag changes, allowing browsers and CDNs to validate cached content without re-downloading it.
How ETags Work
In practice, etags is implemented using standard web technologies. Most modern approaches work across all browsers and require no special server configuration. The key is understanding the underlying principle before applying it to your projects.
Best Practices for ETags
When working with etags, follow established best practices: test across browsers and devices, measure the performance impact, and ensure accessibility for all users. Document your implementation for future reference.
ETags & Canvas Builder
Canvas Builder generates standard HTML, CSS, and Bootstrap 5 output that supports all modern ETags implementations. Pages built with Canvas Builder can leverage ETags without any additional configuration.
Try Canvas Builder →