.htaccess Validator — Apache Rule Checker
Lint Apache .htaccess files for syntax errors, unclosed block tags, and common misconfigurations. Detects RewriteRule issues, invalid status codes, deprecated access directives, and unclosed IfModule blocks. Free and runs entirely in your browser.
How to Use .htaccess Validator — Apache Rule Checker
How to Use .htaccess Validator
Step 1: Paste Your .htaccess Content
Copy the full content of your .htaccess file and paste it into the input field. You can also load one of the built-in examples.
Step 2: Click Validate .htaccess
The tool checks:
- Unclosed block tags —
<IfModule>,<Files>,<FilesMatch>,<Directory>, etc. must be properly closed - RewriteEngine missing — RewriteRule and RewriteCond require
RewriteEngine Onto take effect - Invalid status codes — ErrorDocument must use a valid 4xx or 5xx HTTP code; Redirect codes must be 301, 302, 303, 307, or 308
- Deprecated directives —
Order,Allow, andDenyare deprecated in Apache 2.4+ in favour ofRequire - RewriteRule flag codes — validates [R=xxx] redirect codes in rule flags
- Unknown directives — flags unrecognised directive names that may be typos
Step 3: Review Results
Stats grid — line count, directive count, block sections, rewrite rules, redirects, and headers at a glance.
Errors — issues that will cause rules to fail or Apache to reject the file.
Warnings — non-breaking issues like deprecated directives or unusual patterns.
Block Sections — all detected <IfModule>, <Files>, and other container blocks with their arguments.
Rewrite Rules & Conditions — all RewriteRule and RewriteCond lines for review.
Tips
- Always place
RewriteEngine Onbefore anyRewriteRuleorRewriteConddirective - Every opening
<IfModule>must have a matching</IfModule>on its own line - Test
.htaccesschanges on a staging server — a syntax error can take down your entire site - Use
php_valueandphp_flagonly if PHP runs as an Apache module (not FPM or CGI) - Avoid
Order/Allow/Denyin Apache 2.4+ — useRequire all deniedorRequire all grantedinstead
Frequently Asked Questions
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