Scan themes and plugins for potential header issues such as whitespace before/after PHP tags or direct output before headers.
As of April 2026, Safe Headers Scanner is a WordPress debug plugin with 0 active installations and a 0/5 rating0. It has been downloaded 179 times in total. Requires WordPress 5.0+ and PHP false+. Available on WordPress.org since 2025. Top alternative: WP Crontrol.
Safe Headers Scanner helps WordPress administrators identify common issues that may cause header-related problems.
The plugin scans installed themes and plugins for:
* Unnecessary whitespace before <?php tags
* Extra whitespace after closing ?> tags
* Direct output (e.g., echo, print) before headers are sent
Results are displayed in a clear report, so you can review and fix potential issues easily.
| WordPress | 5.0+ requiredTested up to 6.8.5 |
| PHP | false+ required |
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