See which blocks load which CSS/JS assets on a page and estimate their weight.
| Author: | devmarvs (profile at wordpress.org) |
| WordPress version required: | 6.0 |
| WordPress version tested: | 6.9 |
| Plugin version: | 0.1.0 |
| Added to WordPress repository: | 20-01-2026 |
| Last updated: | 20-01-2026 |
| Rating, %: | 0 |
| Rated by: | 0 |
| Plugin URI: | |
| Total downloads: | 145 |
 Click to start download |
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Block Weight Inspector adds a sidebar panel in the block editor that maps blocks in the current post/page to the CSS and JS assets they register. It estimates local asset sizes, highlights top offenders, and exports a JSON report. It can also generate a suggested conditional-loading snippet to help you dequeue assets when a block is not present.
It also adds a Tools -> Block Weight Inspector screen for auditing existing posts without opening the editor.
Note: The inspector preserves block comment delimiters when analyzing content so parse_blocks() remains accurate after sanitization.
Key features:
- Block -> asset mapping using registered block metadata.
- Estimated size for local assets.
- Top offenders summary and full asset list.
- JSON export for sharing or auditing.
- Suggested conditional-loading rules (review before use).
FAQ
ChangeLog