Block Weight Inspector

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).