How to use: CORS Headers for Apache
CORS Headers for Apache is a free online Web Tools tool that generate Apache mod_headers CORS configuration with OPTIONS preflight rewriting instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Use CORS Headers for Apache now →
Description
Generate Apache mod_headers CORS configuration with OPTIONS preflight rewriting.
- Web Tools
- Because everything is computed client-side, CORS Headers for Apache is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using CORS Headers for Apache takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Examples
Emits mod_headers directives plus the OPTIONS preflight rewrite rule.
Output (generated live by the tool just now)
<IfModule mod_headers.c>
Header always set Access-Control-Allow-Origin "https://app.example.com"
Header always set Access-Control-Allow-Methods "GET,POST,PUT,PATCH,DELETE,OPTIONS"
Header always set Access-Control-Allow-Headers "Content-Type,Authorization,X-Requested-With"
Header always set Access-Control-Expose-Headers "Content-Length,X-Request-Id"
Header always set Access-Control-Max-Age "86400"
</IfModule>
# Preflight
RewriteEngine On
RewriteCond %{REQUEST_METHOD} OPTIONS
RewriteRule ^(.*)$ $1 [R=204,L]
Notes
• Preflight is cached for 86400s, so browsers skip the OPTIONS round trip during that window.
• CORS protects browsers, not your server — it is not an authentication mechanism. Enforce authorisation server-side too.
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where CORS Headers for Apache helps:
- Generate Apache mod_headers CORS configuration with OPTIONS preflight rewriting.
Parameters
This tool has no options — it works on the input alone.
FAQ
What is CORS Headers for Apache?
CORS Headers for Apache generate Apache mod_headers CORS configuration with OPTIONS preflight rewriting. It runs entirely in your browser, so your data stays private.
Is CORS Headers for Apache free to use?
Yes. CORS Headers for Apache is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.