Javascript Projects: 899+ Open-Source Web3 Examples

Browse 899+ open-source Javascript Web3 projects from ETHGlobal hackathons. Find production-ready code, learn from winning implementations, and discover inspiration for your next blockchain build.

JavaScript is a programming language that enables interactive web pages. It's an essential part of web applications and can be used on both the client-side and server-side.

Showing 899 projects built with javascript.

zkEnc

Witness encryption made practical: encrypt with statements, decrypt with proofs—using Circom.

TypeScriptJavaScriptRustNode.jsprivacy

ETHOnline 2025 • 2025

CircleSettle

AI-powered bill splitting with on-chain credit scoring. Split fairly, build trust, unlock loans.

SolidityTypeScriptJavaScriptNext.jsdefi

ETHOnline 2025 • 2025

Truth Swarm

Truth Swarm is a verification mechanism for consumer protections in the age of agentic ai

SolidityJavaScriptPythonRustgaming

ETHOnline 2025 • 2025

XMBL Tokens 4 Nodes

Creation and use of tokens through nodes on XMBL Cubes ( new L1 launching in Argentina 2025 )

JavaScriptRustdefinftinfrastructuresocial

ETHOnline 2025 • 2025

Travelsure

Travelsure: AI-powered flight insurance with instant on-chain payouts for delays & cancellations

SolidityJavaScriptNext.js

ETHOnline 2025 • 2025

DeBazaar

Trustless P2P marketplace for any digital goods with crypto escrow + arbitration

SolidityReactJavaScriptPythonPostgreSQLnftinfrastructuregamingprivacy

ETHOnline 2025 • 2025

CapiNet

Web3 social network. NFC pins turn real-world interactions into digital points & NFTs.

SolidityReactJavaScriptNode.jsnftinfrastructuregamingsocial

ETHOnline 2025 • 2025

DelegateX

Blockchain verifies hybrid crypto/equity trades to showcase portfolio quality.

SolidityReactTypeScriptJavaScriptRustdefinftinfrastructureprivacy

ETHOnline 2025 • 2025

ChainSage AI

AI-powered smart contract security analysis in 30 seconds. Free, multi-chain, open source.

TypeScriptJavaScriptRustNode.jsnftdaoinfrastructuresocialprivacy

ETHOnline 2025 • 2025

SynthX Protocol

AI-powered Chrome extension for instant blockchain analysis on Blockscout

JavaScriptnftinfrastructure

ETHOnline 2025 • 2025

Subscryption

Decentralized subscription service powered by PYUSD smart contracts.

SolidityReactJavaScriptNext.jsdefi

ETHOnline 2025 • 2025

Slasher

A skilled based nostalgic game, on-chain, we're users slice tokens and earn rewards.

SolidityReactJavaScriptNode.jsdefinftgaming

ETHOnline 2025 • 2025

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