Write feed rules like you talk.
Wire them like blocks.
RuleGen turns a plain-English sentence into operators you can snap together on a lab bench — drag, wire, and simulate against your feed before you ever touch the admin.
Six operations. One plain sentence.
Every Merchant Center rule is built from a small, predictable vocabulary. Each one is a block on the bench above — hover here to see it act on a real value.
See the whole feed change at once.
Paste a rule, watch every product title rewrite in place. Filter to problems only when a rollout is on the line.
| Product | Before → After (title) | Status |
|---|
When a rule misbehaves, the lab explains why.
Not "something went wrong." A concrete diagnosis, the evidence, and a fix you can retest in place.
THEN prepend "Nike" to title
Your condition can never be true, so the operation never runs. Every title that lacks "Nike" stays untouched — and the ones that have it don't need the change.
You're requiring the title to already contain the brand you're trying to add. The rule is self-canceling.
| Brand | Title | Result |
|---|---|---|
| Nike | Nike Air Max 95 | cond false |
| Nike | Nike Revival Tee | cond false |
| Nike | Trail Runner X | no brand → skip |
Pick your workbench.
No seats-to-buy theater. One solo tier, one serious-seller tier, one for people who run feeds for a living.
- 50 rule compilations / mo
- Single-product simulation
- Copy-paste rule export
- Community diagnostics
- Unlimited compilations
- Full-feed simulation (1,284 rows)
- Guided diagnostics & fixes
- Bulk rule export
- Everything in Pro
- Multiple brand workspaces
- Rule version history
- API & shared templates
Go from sentence to shipped rule.
Guides, worked examples, and the full reference — every page links straight back to the bench.
How RuleGen works
The three-step workflow and the six operations you can wire together on the bench.
Read the guide →ExamplesReal-world rules
Brand prepends, name normalization, dead-value cleanup, conditional appends — with Before/After.
See examples →PricingPlans & limits
One free tier, one one-time Pro, one for agencies. No seats-to-buy theater.
View pricing →ReferenceAttribute Rules, fully
The complete guide to Merchant Center attribute rules and how to model them.
Open reference →ReferenceTest rules in seconds
Why local simulation beats the 10–20 minute official test loop.
Read more →ReferencePrepend, explained
When a prepend rule fires, when it doesn't, and which row it reads from.
Open article →Private by architecture, not by promise.
RuleGen compiles and simulates in your browser. There is no account to log into and nothing of yours to store — so there is nothing to leak.