Hako

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hako is an Open Source & Models tool that provides an embeddable, lightweight, and secure JavaScript engine. It compiles to WebAssembly for high-performance execution.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is hako?

Hako is an embeddable JavaScript engine built on a fork of QuickJS, designed for secure, lightweight, and high-performance execution. It compiles JavaScript to WebAssembly, allowing it to run within a memory-safe WASM sandbox with configurable resource limits. Hako supports modern JavaScript features including ES2023+, Phase 4 TC39 proposals, top-level await, and built-in TypeScript type stripping. The engine compiles into a single hako.wasm reactor module, approximately 800KB, making it highly portable and suitable for embedding in various applications. It leverages WASM-JIT to optimize performance, making it an ideal solution for developers needing a robust and efficient JavaScript runtime in WebAssembly environments.

Best used for

Ideal for developers who need to embed a secure and high-performance JavaScript engine into their applications, compile JavaScript to WebAssembly, and execute modern JavaScript within a memory-safe sandbox. Especially valuable for projects requiring lightweight runtimes and optimized performance via WASM-JIT.

Common actions

embed javascript engine

compile javascript to webassembly

execute secure javascript

optimize javascript performance

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Capabilities

Key features

Embeddable JavaScript engine
Compiles to WebAssembly
Secure WASM sandbox
High-performance WASM-JIT
ES2023+ JavaScript support
TypeScript type stripping
Lightweight (~800KB .wasm)

Target Audience

developer

Integrations

Not yet documented

Pricing & Plans

Open Source

Free

FAQs

What JavaScript features does Hako support?

Hako supports modern JavaScript, including ES2023+, Phase 4 TC39 proposals, and top-level await. It also features built-in TypeScript type stripping, making it compatible with contemporary JavaScript development practices.

How does Hako ensure security and performance?

Hako executes JavaScript within a memory-safe WebAssembly sandbox, allowing for configurable resource limits to enhance security. For performance, it utilizes WASM-JIT (WebAssembly Just-In-Time compilation) to maximize execution speed.

What is the size of the Hako engine?

The Hako engine compiles into a single hako.wasm reactor module, which is approximately 800KB in size. This lightweight footprint makes it highly suitable for embedding in various applications where size is a consideration.

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