Zod is a TypeScript-first schema declaration and validation library. It allows developers to define data shapes with a concise, readable syntax, automatically generating TypeScript types from these schemas. Zod validates data at runtime, catching inconsistencies and providing detailed error messages. This enables robust data validation for APIs, forms, and any application handling external inputs. Its focus on type safety reduces runtime errors and improves code maintainability, making it a valuable tool for ensuring data integrity in TypeScript projects.
Zod's release frequency shows peaks in 2020 and 2021, with a resurgence in 2025. Initial releases were frequent, reaching version 1.11. In 2021, version 3.0 emerged, followed by many minor updates. 2022 and 2023 saw fewer releases. 2025 had very high release activity, bringing versions from 3.24 to 4.1.5 in only 8 months.
Zod's npm package downloads exhibited strong growth from March 2024 to August 2025, peaking at over 172 million. Starting in March 2024 with 23 million downloads, a steady increase was observed. September 2025 data is incomplete, showing a significant drop, but no conclusion can be made.
