Apache Config Validator
Validate your Apache configuration files online for free. Our validator checks syntax, container directives (VirtualHost, Directory, Location), SSL/TLS settings, rewrite rules, deprecated directives, security hardening, access control, proxy configuration, and common misconfigurations with detailed error messages and line numbers. Perfect for web server administration, DevOps, and deployment pipelines.
Checks against Apache HTTP Server 2.4 syntax and its core, mod_ssl and mod_rewrite rules. Other directives are not checked.
Why Use Our Apache Config Validator?
Instant Validation
Our tool to validate Apache config analyzes your content instantly in your browser. Validate Apache files of any size with zero wait time - get detailed error reports with line numbers in milliseconds.
Secure & Private Processing
Your data never leaves your browser when you use our Apache validator online tool. Everything is processed locally using JavaScript, ensuring complete privacy and security for sensitive configuration data.
No File Size Limits
Validate large Apache files without restrictions. Our free Apache Config Validator handles any size input - from small configs to massive files with thousands of entries.
100% Free Forever
Use our Apache Config Validator completely free with no limitations. No signup required, no hidden fees, no premium tiers - just unlimited, free validation whenever you need it. The best free Apache validator online available.
Common Use Cases for Apache Config Validator
VirtualHost Validation
Validate VirtualHost containers for address:port format, required ServerName, DocumentRoot paths, SSL certificate/key pairs, and proper container nesting. Detect mismatched or unclosed container tags.
SSL/TLS Configuration
Check SSLProtocol for insecure versions (SSLv2, SSLv3, TLSv1, TLSv1.1), verify SSLEngine on blocks have certificate and key file directives, and recommend modern TLS-only configurations for secure HTTPS.
Rewrite Rules & Redirects
Validate RewriteRule patterns, substitutions, and flags. Check Redirect status codes, verify RewriteEngine is enabled, and detect deprecated rewrite logging directives (RewriteLog, RewriteLogLevel).
Security Hardening
Detect ServerSignature/ServerTokens exposing server info, Indexes option enabling directory listing, TraceEnable allowing HTTP TRACE, ProxyRequests forward proxying, AllowOverride All risks, and deprecated access control (Order/Allow/Deny).
Directive Validation
Check Options, AllowOverride, LogLevel, and Listen directive values. Validate ErrorDocument status codes, Timeout values, KeepAlive settings, Header actions, and ProxyPass URL schemes with clear error messages.
Migration & Deprecation
Identify Apache 2.2 deprecated directives (Order, Allow, Deny, Satisfy, RewriteLog) and recommend Apache 2.4+ replacements (Require, LogLevel). Ensure your config is compatible with modern Apache versions.
Understanding Apache Validation
What is Apache Validation?
Apache validation is the process of checking Apache HTTP Server Configuration files (.conf) for syntax errors, structural issues, invalid values, duplicate keys, and specification compliance - helping you catch problems before deployment. Apache is widely used for configuring the Apache HTTP Server with virtual hosts, directory access controls, URL rewrite rules, SSL/TLS certificates, proxy settings, module loading, authentication, logging, caching, and security directives for flexible and powerful web serving. Our free Apache validator online tool checks your content instantly in your browser. Whether you need to validate Apache config for web server administration, virtual host setup, .htaccess configuration, reverse proxy setup, URL rewriting, SSL/TLS termination, access control, load balancing, CGI/PHP configuration, and security hardening, our tool finds errors accurately and privately.
How Our Apache config validator Works
- Input Your Apache Content: Paste your Apache content directly into the text area or upload a
.conffile from your device. Our Apache validator online tool accepts any Apache input. - Instant Browser-Based Validation: Click the "Validate Apache" button. Our tool analyzes your content entirely in your browser - no data is sent to any server, ensuring complete privacy.
- Review Detailed Error Reports: View a comprehensive list of errors with line numbers, descriptions, and severity levels. Fix issues with pinpoint accuracy using our clear error messages.
What Gets Validated
- Syntax Correctness: Checks for proper syntax including balanced brackets, correct string quoting, valid escape sequences, and proper key-value pair formatting.
- Data Types: Validates integers, floats, booleans, strings, datetimes, arrays, and inline tables conform to the Apache specification.
- Structural Integrity: Detects duplicate keys, conflicting table definitions, invalid table headers, and malformed sections.
- Line-by-Line Reporting: Every error includes its exact line number and a clear description, making it easy to find and fix issues in your Apache files.
Privacy, Security & Availability
Our Apache validator online runs 100% client-side in your browser using JavaScript - your Apache content is never uploaded to any server, stored in a database, or transmitted anywhere. This makes it safe to validate sensitive configuration files, API keys, and internal infrastructure definitions. The tool is completely free with no signup, no usage limits, and no premium tier. Use it as many times as you need for any project - personal, commercial, or enterprise - at no cost.
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Frequently Asked Questions - Apache config validator
An Apache config validator is a tool that checks your httpd.conf or .htaccess files for syntax errors, unclosed container tags, invalid directives, SSL/TLS misconfigurations, deprecated Apache 2.2 directives, and security vulnerabilities. Our Apache validator online tool processes everything in your browser giving you instant feedback with line numbers and detailed descriptions.
Our Apache config validator detects unclosed/mismatched container tags (VirtualHost, Directory, Location, etc.), missing Listen directives, VirtualHost blocks without ServerName, SSL blocks missing certificates, insecure SSLProtocol settings, deprecated directives (Order, Allow, Deny, Satisfy, RewriteLog), invalid Options and AllowOverride values, ServerTokens/ServerSignature exposure, directory listing risks, ProxyRequests forward proxy warnings, invalid RewriteRule flags, Header action errors, and other security and structural issues.
Absolutely! Your data is completely secure. All validation happens directly in your browser using JavaScript so no data is ever uploaded to any server. Your Apache configuration content never leaves your device.
Yes! The validator checks SSLProtocol for deprecated and insecure versions (SSLv2, SSLv3, TLSv1, TLSv1.1), verifies that SSLEngine on blocks have both SSLCertificateFile and SSLCertificateKeyFile directives, and recommends using only TLSv1.2 and TLSv1.3 for modern security.
Yes! The validator identifies deprecated Apache 2.2 access control directives (Order, Allow, Deny, Satisfy) and recommends the Apache 2.4+ Require directive. It also flags deprecated RewriteLog and RewriteLogLevel directives that should be replaced with LogLevel rewrite:trace in modern Apache.
Yes, you can paste .htaccess content and the validator will check directive syntax, RewriteRule arguments and flags, Options and AllowOverride values, and Header actions.
Yes, our Apache config validator is 100% free with absolutely no hidden costs or limitations. There is no signup required, no premium tier, no usage limits, and no file size restrictions. Use it unlimited times for any project.
Yes! The validator checks VirtualHost address:port format, required ServerName directives, DocumentRoot paths, Directory/Location container nesting, proper container tag matching, and common configuration patterns inside these containers.