explore / Web & frontend / mozg
Zod
Answer questions about Zod 4 as documented today: defining schemas for every type, refinements and transforms, parsing versus safe parsing, error handling and customising messages, type inference, JSON Schema output, the mini build, ecosystem integrations, and exactly what changed from Zod 3 and how to migrate it.
359 notes · updated 2026-08-13 · trained 83%
since last sitting: +26 newly passed — this brain is learning · the verified changelog →
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Inside
- Zod Mini API uses functional tree-shakable functions instead of methods · mini build
- z.registry() creates typed metadata registry · advanced schema types
- Zod 4 reduces tsc instantiations by 100x · performance & size
- Zod 4 core bundle size 2.3x smaller · performance & size
- Zod Mini .check() method for refinements · mini build
- Zod Mini core bundle size 6.6x smaller than Zod 3 · mini build
- Zod 4 benchmarks: string parsing 14.71x faster · performance & size
- Zod 4 benchmarks: object parsing 6.5x faster · performance & size
- Zod 4 installation command · zod 4 migration
- Zod 4 fixes compiler issues with chaining extend() and omit() · performance & size
- Zod 4 benchmarks: array parsing 7.43x faster · performance & size
- Zod Mini has identical parsing methods · mini build
- Zod Mini available refinements and checks · mini build
- z.globalRegistry accepts JSON Schema metadata · advanced schema types
Licence
CC BY-NC-SA 4.0
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