Paste your apache2.conf, httpd.conf, or virtual host snippet and instantly validate syntax, detect unknown directives, unclosed containers, and unbalanced quotes — right in your browser.
# VirtualHost example <VirtualHost *:80> ServerName example.com DocumentRoot /var/www/html ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined <Directory /var/www/html> Options -Indexes +FollowSymLinks AllowOverride All Require all granted </Directory> </VirtualHost>
A complete client-side Apache configuration validator with deep directive knowledge, instant feedback, and zero data exposure.
Detects unclosed container blocks, mismatched closing tags, missing angle brackets, and unbalanced quotes with line-accurate reporting.
Recognizes core, mod_rewrite, mod_ssl, mod_proxy, mod_auth, mod_headers, mod_ssl, mod_security and many more out of the box.
Toggle Live Validate and watch errors appear as you type — perfect for learning Apache configuration syntax quickly.
Your configuration never leaves your browser. Safe to validate internal virtual hosts, rewrite rules, and SSL configs.
Load ready-to-use examples: HTTP vhost, SSL vhost, password-protected directory, URL rewrites, and an intentionally broken demo.
Upload .conf files directly from disk, copy results to clipboard, and filter issues by severity for fast triage.
Validate any Apache configuration in four simple steps — no installs, no logins, no servers.
Copy your apache2.conf, httpd.conf, virtual host, or any config snippet into the editor, or load a sample template.
Or keep Live Validate on for instant analysis. The parser tokenizes each line and tracks container block nesting.
Browse errors, warnings, and info messages with exact line numbers, severity badges, and human-readable explanations.
Apply fixes, re-validate until clean, then deploy with confidence. Filter results to focus on what matters most.
What is an Apache Config Tester and why should you use one? Apache Config Tester is a free, browser-based utility that lets you verify Apache config files without ever touching a terminal. Every Apache HTTP Server installation relies on a set of plain-text directives stored in the Apache conf file. These directives control virtual hosts, modules, security rules, redirects, SSL certificates, logging behavior, and performance tuning. A single typo, missing angle bracket, or misplaced argument can prevent Apache from starting, often with a cryptic error that takes hours to trace. By choosing to test Apache config online before deployment, you catch syntax errors, unclosed container blocks, unknown directives, and unbalanced quotes in seconds.
Wondering about the Apache conf file location? On Debian and Ubuntu systems, the primary configuration lives at /etc/apache2/apache2.conf, with virtual hosts typically stored in /etc/apache2/sites-available/. On CentOS, RHEL, and Fedora, the main file is /etc/httpd/conf/httpd.conf, while additional configurations are loaded from /etc/httpd/conf.d/. After editing any of these files, administrators traditionally run apachectl configtest or apache2ctl -t on the server. Our Apache Config Tester brings that same validation power into your browser, so you can audit configuration snippets before pushing them to production.
How to verify Apache config with our tool? Simply paste your configuration block into the editor above, click Validate, and review the structured report. Each result includes the line number, severity, and a plain-English explanation of what is wrong. The validator recognizes standard directives such as ServerName, DocumentRoot, Listen, Directory, VirtualHost, IfModule, RewriteRule, Require, SSLEngine, ProxyPass, and many more. It also flags mismatched closing tags, unclosed containers, and unknown directives that usually indicate a missing LoadModule line.
Here is a quick Apache configuration example. A minimal virtual host looks like this:
<VirtualHost *:80>
ServerName example.com
DocumentRoot /var/www/html
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
Paste this snippet into the tester and it will confirm there are no syntax errors. Try removing the closing </VirtualHost> tag to see how the validator detects the unclosed block. Whether you are a DevOps engineer, system administrator, or self-taught developer, our Apache Config Tester removes guesswork from configuration management and keeps your web server running smoothly. Test Apache config files anytime, anywhere — completely free and entirely private.
apachectl configtest./etc/apache2/apache2.conf. On CentOS, RHEL, and Fedora it is at /etc/httpd/conf/httpd.conf. Virtual hosts are typically stored in sites-available (Debian) or conf.d (RHEL family).apachectl configtest or apache2ctl -t on the server. The command performs a syntax check and reports errors with line numbers. Our online tester offers the same convenience from any browser, with no SSH access required.Require, RequireAll, RequireAny, IfModule, IfVersion, mod_rewrite, mod_ssl, mod_proxy, mod_security, and many more. It also flags unknown directives that usually indicate a missing LoadModule line.Browse our complete collection of developer, DevOps, and SEO testing utilities — all free, all browser-based, all privacy-first.