v0.1.0 Alpha

Hyperion
Browser

From-scratch web browser | 11 Phases Complete

Built from scratch with C++23 and Rust. Hyperion implements modern web standards including HTTPS, ES2023 JavaScript, DOM, CSS Grid/Flexbox, Canvas 2D, and more. All 11 roadmap phases functionally complete.

Download v0.1.0 View Docs

Compatibility

Phases Complete

Languages

hyperion://welcome

1// Hyperion v0.1.0 Alpha
2const browser = new Hyperion();
3
4// HTTPS + TLS 1.3
5await fetch("https://");
6
7// ES2023 JavaScript
8const data = await res.json();
9
10// Storage APIs
11localStorage.setItem("key", data);
12
13// Canvas 2D Rendering
14ctx.fillRect(0, 0, 100, 100);

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Current Status

~65% Web Compatibility

Hyperion can load static sites, handle HTTPS requests, execute JavaScript, and render basic layouts. Targeting 99% compatibility.

Next Goal: 99% Compatibility (See PLANS.md)

Completed Features

11 Phases Complete

All roadmap phases (1-11) are functionally complete. From HTTPS foundation to extension support.

HTTPS & TLS

SChannel TLS 1.2/1.3 integration with certificate chain validation. Secure HTTPS connections.

Complete Windows SChannel

JavaScript APIs

fetch(), Promise, async/await, XMLHttpRequest, WebSocket, JSON. Full ES2023 support.

Complete HyperionJS VM

Storage & State

localStorage, sessionStorage, Cookie management, IndexedDB, Cache API.

Complete File-based + Memory

DOM & Events

EventTarget API, mouse events, keyboard events, form handling, DOM mutations.

Complete C++ DOM Engine

Media & Graphics

PNG, JPEG, WebP decoders in Rust. Canvas 2D API, video/audio elements.

Complete Rust + Direct2D

CSS Engine

CSS Grid, Flexbox, CSS Variables, @keyframes animations, transitions, media queries.

Complete Rust CSS Parser

Performance

Basic JIT hints, lazy loading for images, worker threads skeleton, SIMD image ops.

Complete Optimization Layer

Security

CSP parser, CORS enforcement, XSS filtering, sandbox hooks, secure contexts.

Complete Windows Job Objects

DevTools & Extensions

DevTools server, DOM inspector, network monitor, extension manager, Manifest V3.

Complete Chrome API Stubs

Architecture

Project Structure

Modular architecture with dedicated engines for each major function.

1 engine/ - Core Browser Engine (C++)

hre/ public headers. Implementation: net/ (HTTPS, WebSocket), script/ (JS VM bindings), dom/ (DOM), css/ (CSS engine), storage/ (localStorage, IndexedDB), security/ (CSP, CORS), devtools/ (DevTools server), extensions/ (Extension manager).

2 HyperionJS/ - JavaScript Engine

hjs/ headers. Implementation: lexer/ (Tokenizer), parser/ (Parser), vm/ (Bytecode interpreter), runtime/ (Built-ins: Promise, JSON, console).

3 Rust Image Decoders

hyperion_png/ (PNG decoder), hyperion_jpeg/ (JPEG decoder). High-performance image decoding with Rust's memory safety.

4 browser/ - UI Layer (Win32)

Main window, tab management. ui/ directory contains HTML/CSS DevTools interface.

5 Technologies Used

C++23 (core), Rust (image decoders), Windows SChannel (TLS), Direct2D/DirectWrite (Canvas), WASAPI (Audio).

Tech Stack

Six Languages

Each language chosen for its strengths where it excels most.

C++23

Core Engine

Rust

Image Decoders

C

Performance-Critical

Assembly

Optimizations

Python

Build Scripts

SChannel

TLS/SSL

Direct2D

Graphics

WASAPI

Audio

By the Numbers

Project Stats