Test, validate, and preview every change before it reaches your users — with dry-run execution, output validation, and side-by-side HTML comparison.
Every change in Ninja moves through a controlled lifecycle — from draft to live. You decide when it's ready. You see the result before anyone else does.
A dry run executes your rule with real logic and real data — but in complete isolation from production. Users see nothing. Your origin is not affected. The output is captured for inspection.
It's not a simulation of what might happen. It's exactly what will happen — without any consequences.
Ninja shows you a line-by-line diff between the original HTML and the modified output. Every change is highlighted — additions in green, removals in red. Nothing is hidden.
After a dry run, Ninja automatically validates the output against a set of checks — verifying that the modified HTML is complete, structurally correct, and matches expected values.
After validation, Ninja generates a private preview link that renders the exact modified output — accessible only to those you share it with. No public exposure, no live traffic impact.
Every rule exists in one of three modes. You move between them deliberately — with full control over what's active in production at any given moment.
Every execution is logged. Every change is tracked. You always know what ran, when it ran, what it changed, and what the result was — in production and in dry-run.
Dry-run a title or meta update, validate output length and structure, preview how it renders — before it goes live and gets indexed.
Preview a UI injection or layout change in a real browser before production. Share with your design team for sign-off via a private link.
Verify that a security header injection or script removal works correctly — without the risk of breaking anything in production.
Prepare and preview a promotional banner or CTA change for a campaign launch. Verify it on mobile. Approve before the campaign goes live.
Run automated validation checks on every rule change before it reaches production — no manual QA cycle needed for standard checks.
If something unexpected happens in production, deactivate the rule instantly. The site returns to its original state — no emergency deploy required.
| Dimension | Traditional Deploy | Ninja Controlled Execution |
|---|---|---|
| Deployment | Direct to production — no staging | Draft → Dry Run → Preview → Live |
| Preview | No preview before production | Private preview link before any user sees it |
| Testing | Test on production or separate environment | Dry run on real traffic — zero production impact |
| Validation | Manual checks after deploy | Automated HTML checks before activation |
| Visibility | Limited — hard to trace what changed | Full audit log — every execution tracked |
| Rollback | New deploy or revert commit | One click — instant, no deploy needed |
| Risk | Errors reach users before detection | Errors caught before production — every time |
Validation catches problems before they reach production — every time, automatically.
Preview and approval before every activation. No more surprises in production.
Dry runs complete in seconds. No environment setup, no deploy cycle, no waiting.
Every execution is deliberate. You decide what's live. You can reverse it instantly.
You don't just change the site. You control
every step before it reaches anyone.
Test every change with a dry run, validate the output, preview it privately — then go live with full confidence and instant rollback.