Zero-Knowledge Development Libraries

ZK-Kit is a set of libraries (algorithms, utility functions and data structures) that can be reused in different projects and zero-knowledge protocols.
Zero-Knowledge Development Libraries

Key Features

Everything you need to build robust, privacy-preserving applications.
Language-Specific Packages
Language-Specific Packages
Dedicated libraries for multiple programming languages, making it easy to build in your preferred environment.
Modular Design
Modular Design
Each package is independent and composable, so you can include only the parts relevant to your project.
Fully Documented
Fully Documented
Comprehensive documentation, usage examples, and test coverage, ensuring smooth development process.
Battle-Tested
Battle-Tested
Used in real-world ZK apps and protocols, ensuring stability and performance in production environments.
Community-Driven
Community-Driven
Built by and for developers, maintained openly with contributions from members teams and institutions across the ecosystem.

Supported Languages

Native implementations across popular languages and frameworks.
JavaScript
Web & Node.js applications
9 packages
Circom
Zero-Knowledge circuits
5 packages
Noir
Privacy-focused DSL
4 packages
Solidity
Smart contracts
4 packages
Rust
High-performance systems
3 packages

Featured Projects

Discover what the community is building with ZK-Kit
Javascript
Solidity
Circom
MACI
Minimal Anti-Collusion Infrastructure (MACI) is a private, on-chain, voting system.
Javascript
Solidity
Privacy Pools
Privacy Pools is a blockchain protocol that enables private asset transfers. Users can deposit funds publicly and partially withdraw them privately, provided they can prove membership in an approved set of addresses.
Javascript
Circom
Zupass
Software for storing and managing Proof-Carrying Data: any data whose well-formedness and validity are cryptographically verifiable.
Javascript
Solidity
Circom
Self Protocol
Prove your humanity seamlessly & privately.
Javascript
Circom
Solidity
Semaphore
A zero-knowledge protocol for anonymous proof of membership.
Javascript
Solidity
Circom
MACI
Minimal Anti-Collusion Infrastructure (MACI) is a private, on-chain, voting system.
Javascript
Solidity
Privacy Pools
Privacy Pools is a blockchain protocol that enables private asset transfers. Users can deposit funds publicly and partially withdraw them privately, provided they can prove membership in an approved set of addresses.
Javascript
Circom
Zupass
Software for storing and managing Proof-Carrying Data: any data whose well-formedness and validity are cryptographically verifiable.
Javascript
Solidity
Circom
Self Protocol
Prove your humanity seamlessly & privately.
Javascript
Circom
Solidity
Semaphore
A zero-knowledge protocol for anonymous proof of membership.
Javascript
Solidity
Circom
MACI
Minimal Anti-Collusion Infrastructure (MACI) is a private, on-chain, voting system.
Javascript
Solidity
Privacy Pools
Privacy Pools is a blockchain protocol that enables private asset transfers. Users can deposit funds publicly and partially withdraw them privately, provided they can prove membership in an approved set of addresses.
Javascript
Circom
Zupass
Software for storing and managing Proof-Carrying Data: any data whose well-formedness and validity are cryptographically verifiable.

Our Partners

Trusted by leading organizations building the future of privacy-preserving technology.
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Ethereum Foundation
Join the communityConnect with other contributors, get help, and stay updated on the latest developments.