The Chinese Zodiac Compatibility tool checks two animals you already know against exactly two sourced rules—the four San He trines and the six Liu Chong oppositions—with no account, no email, no payment, and no personal data collection. The browser lives entirely in the current page, so the pair you select never leaves your device, and the result is computed from a fixed reference table rather than from any kind of compatibility score. Because the tool never asks for a name, birth date, gender, location, or relationship history, it is a clean fit for readers who simply want to look up whether the animals behind a friendship, family tie, or partnership belong to the same traditional trine, sit across from each other as a Liu Chong opposition, or fall outside both rules. Both selectors use the canonical 12-position cycle in the order Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, and Pig, which mirrors the interface of the related Chinese Zodiac Calculator so readers can move between year lookup and relationship lookup without re-learning the labels. Every classification is symmetric: swapping the first and second animal changes the display order but never the sourced outcome.
Why a Free, No-Sign-Up Compatibility Check Matters
Most readers searching for a Chinese zodiac compatibility check are not looking for a subscription product or a personality quiz. They want a quick lookup: pick the two animals already on the table, read the result, and move on. The Chinese Zodiac Compatibility browser is built around that exact expectation. The page never displays a paywall, a registration modal, a "create your free account" prompt, or a request for any personal identifier. There is no upload step, no network call to a compatibility server, no cookie banner tied to a marketing list, and no local storage write. The two selectors are native form controls with a 44-pixel minimum tap height, and the classification runs in the page as soon as both selections are valid.
This matters because compatibility browsers that ask for personal data tend to fold a folk classification into a score, a prediction, or a sales funnel. A score turns a two-rule reference table into a single number that suggests a quantitative answer where the source traditions disagree. A prediction turns a cultural category into a forecast that the same sources do not support. A signup turns a one-look reference into an account that follows the reader elsewhere. The two-rule browser avoids all three by design. The selectors hold their values only in React page state, the visible limitation statement is right on the page, and the page does not pretend that year-animal matching is a scientific measurement or a substitute for a complete BaZi/Four Pillars analysis.
How to Compare Two Animals in Three Steps
- Open the Chinese Zodiac Compatibility page and locate the two selectors. They appear in the canonical order Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, and Pig, the same 12-position cycle used by the year-lookup tool.
- Pick the first animal from the left selector and the second animal from the right selector. The browser does not ask for a birth year, a Gregorian date, a name, a gender, or any other detail. Direct selection keeps the relationship table separate from calendar conversion and avoids guessing across the Lunar New Year boundary.
- Read the label that appears between the two profiles—Traditional trine (San He), Direct opposition (Liu Chong), or Not classified by this limited two-rule model—and use the Swap control if you want to confirm the classification is symmetric. Swapping the two animals changes their display order but never the sourced outcome.
Each profile panel also shows the selected animal's full three-member trine group and its single direct opposite, so the classification can be checked against the reference data without trusting an unexplained badge. If you are new to the two-rule model, the beginners' walkthrough introduces the same labels with examples drawn from the canonical cycle.
The Two Sourced Rules Behind Every Result
The browser classifies a pair using exactly two reference tables drawn from the cited cultural sources, including the Hong Kong Observatory's overview of the 12-year animal cycle and the National Folk Museum of Korea's guide to zodiac harmony. The tables are stored as literal fixtures, not derived from any other rule.
| San He trine | Three animals in the group |
|---|---|
| First trine | Rat, Dragon, Monkey |
| Second trine | Ox, Snake, Rooster |
| Third trine | Tiger, Horse, Dog |
| Fourth trine | Rabbit, Goat, Pig |
Any two distinct animals inside one of those four groups receive the label Traditional trine (San He). Across all four groups there are exactly 12 unordered trine pairs, and a sign paired with itself is not treated as a two-sign trine pair.
| Liu Chong opposition | Direct pair |
|---|---|
| First opposition | Rat and Horse |
| Second opposition | Ox and Goat |
| Third opposition | Tiger and Monkey |
| Fourth opposition | Rabbit and Rooster |
| Fifth opposition | Dragon and Dog |
| Sixth opposition | Snake and Pig |
Each of the six pairs above receives the label Direct opposition (Liu Chong). Each animal therefore has exactly one opposite in this narrow model, and the six opposition pairs never overlap the 12 trine pairs. Sources document different named conflict traditions, so the browser does not merge them into one false universal table.
What "Not Classified by This Limited Model" Really Means
Out of the 66 unordered pairs formed by 12 animals, 12 are trine pairs and 6 are opposition pairs, leaving 48 pairs that the browser labels Not classified by this limited two-rule model. The phrase is intentional. It does not mean neutral, compatible, incompatible, safe, ideal, or doomed. It only means the pair is neither inside one of the four sourced San He trines nor one of the six Liu Chong oppositions.
Broader traditions may also consider Six Harmonies, harms, punishments, Five Elements, or relationships among the year, month, day, and hour branches. Full Four Pillars practice can read year, month, day, and hour together with element cycles, which the two-rule browser does not attempt. English source labels also vary—the interface uses Rat, Ox, and Goat, while cited sources may use Mouse, Cow, Sheep, or Ram for the same cycle positions—so the tool normalizes only the declared source aliases and does not silently treat Cat, Boar, or other regional substitutions as equivalent.
If a reader wants to walk through every one of those 48 pairs for a single anchor animal, the 48 unclassified pairs guide lines them up pair by pair against the same two rules.
What the Browser Does Not Collect, Ask, or Predict
Because the article keyword calls out free no sign up, it is worth being explicit about what the browser does not do. It does not request a name, birth date, gender, location, relationship history, account, upload, network service, cookie, or local storage write. It does not turn a folk classification into a percentage. It does not rank people. It does not predict whether a friendship, family relationship, or partnership will succeed. The visible limitation statement on the page says that year-animal matching is not a scientific measurement and should not guide consequential relationship decisions or substitute for a complete BaZi/Four Pillars analysis.
The tool also does not infer an animal from a Gregorian year. Direct selection is a deliberate choice: it keeps the relationship table separate from calendar conversion and avoids the Lunar New Year boundary issue that affects year lookup. Readers who need to map a supported year to an animal should use the related Chinese Zodiac Calculator instead, which keeps the boundary warning visible. Readers who want to walk every pair for a single animal can use one of the per-anchor guides, and readers who want a beginner's framing of the same two rules can start with the two-rules walkthrough already linked above.
A Clearer Picture of the Tool's Boundaries
| Aspect | What the browser does | What the browser does not do |
|---|---|---|
| Inputs | Two animal selections from the canonical 12-position cycle | No birth year, Gregorian date, name, gender, or location |
| Reference rules | Four San He trines and six Liu Chong oppositions, stored as literal fixtures | No derived score, no merged conflict traditions, no element inference |
| Output | Trine, opposition, or unclassified label, plus each animal's full group and opposite | No percentage, no rank, no prediction, no compatibility verdict |
| Data handling | Selections stay in React page state only | No account, cookie, local storage, upload, or network service |
| Scope of cycle | Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, Pig | No silent acceptance of Cat, Boar, or other regional substitutions |
Read together, the two reference tables and the limits above describe the entire surface area of the tool. The two-rule browser is a transparent reference for two named cultural rules, not an objective compatibility test, and the free, no-sign-up framing is a direct consequence of that scope.