Application-level security work (input validation, auth logic, dependency management) tends to get most of the attention, while response headers — a purely configuration-level layer of defense — often go unset by default on a lot of stacks, quietly leaving low-effort protections on the table.
A few headers cover a lot of ground
Content-Security-Policy restricts which sources scripts, styles and other resources can load from, which is one of the stronger available defenses against cross-site scripting. Strict-Transport-Security forces browsers to only connect over HTTPS going forward, closing the window for downgrade attacks. X-Frame-Options and the newer Cross-Origin-Opener-Policy both reduce clickjacking and cross-window attack surface.
These are set once, not per-request
Unlike application logic, these headers are typically configured once at the web server, reverse proxy or CDN level and then apply automatically to every response — which makes them a genuinely high-leverage, low-effort item to check off before a launch, since the work is a config change, not new code.
TeckForge's Security Headers Checker takes the raw response headers from your browser's Network tab (or a curl -I output) and reports which common security headers are present and what each one is protecting against — a quick pre-launch sanity check, done entirely offline on text you paste in yourself.
