Axum Trailing Slash 404 Issue: Cause, SEO Impact, and NormalizePathLayer Solution

2025-05-24

A detailed analysis of the 404 error caused by trailing slashes in Axum URLs and its serious SEO impact (e.g., soft 404s, indexing issues). This article provides a solution using tower_http's NormalizePathLayer middleware to automatically remove trailing slashes, ensuring URL path consistency, preventing 404s, and improving website SEO performance.