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npm · #423 most downloaded on npm
TypeScript-first schema declaration and validation library with static type inference
Last release 13 days ago
13 Sep 2026
Ships unpredictably
gaps range from 8 days to 3 months
Nearly every release is documented
notes for 57 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
7 years old
1011 releases · first in 2020
One column per quarter.
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5b5b129315fbc94a3b0d6244185eaeefcbe438d1 4.2.1
https://github.com/standard-schema/standard-schema/pull/134
https://github.com/standard-schema/standard-schema/pull/134
z.fromJSONSchema()const jsonSchema = {
type: "object",
properties: {
name: { type: "string" },
age: { type: "number" }
},
required: ["name"]
};
const schema = z.fromJSONSchema(jsonSchema);
z.xor()const schema = z.xor(
z.object({ type: "user", name: z.string() }),
z.object({ type: "admin", role: z.string() })
);
// Exactly one of the schemas must match
z.looseRecord()const schema = z.looseRecord(z.string(), z.number());
// Allows additional properties beyond those defined
z.undefined() (#5504).toJSONSchema() method (#5477)z.fromJSONSchema(), z.looseRecord(), z.xor() (#5534)Nothing published for this version
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