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Hiero JavaScript SDK

The Hiero JavaScript SDK is an open-source JavaScript and TypeScript library for creating and updating on-ledger assets and interacting with smart contracts on Hedera and other Hiero networks. Developers add it to applications through a package manager or use its browser UMD build.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Hiero JavaScript SDK — OpenViST project profile in Developer Tools.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use the SDK when a JavaScript or TypeScript application needs to perform asset or smart-contract interactions on a Hedera or other Hiero network. The browser UMD build is an alternative to package-manager installation for browser use.

Who it is for

  • JavaScript and TypeScript developers building applications for Hedera or other Hiero networks
  • Contributors who want to build the SDK or run its integration tests locally

Documented uses

  • Create or update on-ledger assets from an application
  • Connect application logic to smart contracts on a Hedera or other Hiero network
  • Build and locally link SDK packages while developing the library
Before you choose

Requirements & limits

The SDK is publicly available as a package and repository under the Apache-2.0 license. The README lists npm, Yarn and pnpm installation options and a browser UMD build.

  • The library targets Hedera and other Hiero networks, rather than acting as a network or hosted application itself.
  • The repository uses pnpm workspaces and includes proto, cryptography and main SDK packages.
  • The README distinguishes React Native setup by SDK version; React Native Bare is listed as unsupported.
  • Solo-based local integration testing has separate platform and memory requirements from ordinary package use.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Install the SDK and prepare its examples

Add the SDK package to a JavaScript or TypeScript project and prepare the repository examples.

Before you start

  • Node.js and a JavaScript package manager such as npm, Yarn or pnpm
  • For the repository examples: Taskfile, Node.js (20 or later recommended), and pnpm

Steps

  1. Install the SDK with the command below, yarn add @hiero-ledger/sdk or pnpm add @hiero-ledger/sdk.

    Documented command
    npm install --save @hiero-ledger/sdk

  2. To prepare repository examples, run task build from the repository root.

  3. Install example dependencies with pnpm install in the examples directory.

Expected outcome

The package is added to the project; after the repository build and dependency installation, the examples are prepared to run.

Guide limitations

  • The guide prepares the examples but does not describe a specific network configuration or transaction.
  • Node.js 20 or later is recommended for building; Node.js 16 may work but is not officially tested.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
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Sources checked
10 October 2026
Original website title
hiero-ledger/hiero-sdk-js · Official homepage title · retained in its source language
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