Hashrock Works

Chord progression study tool for learning music theory

An interactive chord progression study tool that helps musicians learn and practice music theory. Explore different chord progressions and understand harmonic relationships.

Browser-based SVG path editor for vector graphics

A full-featured SVG path editor that runs entirely in the browser. Create, edit, and manipulate vector paths with precision. Perfect for designers and developers working with SVG graphics.

FM synthesis drum machine in your browser

An FM synthesis-based drum machine that creates electronic drum sounds using frequency modulation. Experiment with sound design and create unique percussion patterns directly in your browser.

Quick digital drawing pad for rapid sketching

A rapid drawing pad for quick sketches and visual brainstorming. No setup required - just open and start drawing. Perfect for capturing ideas quickly.

Privacy-focused video converter - no server upload required

A video converting tool that processes files entirely in your browser. Your videos never leave your device, ensuring complete privacy. Convert between formats without uploading to any server.

Minimal pixel art editor for retro-style graphics

A minimal pixel art editor for creating retro-style graphics and sprites. Simple, focused interface for pixel-perfect artwork directly in the browser.

Text-based mindmap editor using simple textarea

A mindmap editor built on a simple textarea interface. Create hierarchical mind maps using plain text with indentation. Lightweight and distraction-free.

Image reference organizer for artists and designers

An image reference tool for drawing, designing, and creative work. Organize and display reference images in a clean interface while you work on your projects.

Test your webcam and microphone in seconds

A simple utility to quickly check if your webcam and microphone are working properly. No installation needed - test your devices directly in the browser before important meetings.

Event planning and hosting assistant tool

An event planning and hosting assistant (イベント開催くん). Helps organize and manage events with useful utilities for event coordinators.

Convert Markdown to Scrapbox (Cosense) format online

An online converter that transforms Markdown documents into Scrapbox (Cosense) format. Essential tool for Scrapbox users who want to migrate or convert content from Markdown sources.

Simple time tracking and display utility

A time tracking and display utility (時間くん - 'Jikan-kun' means 'Time buddy' in Japanese). A simple tool for monitoring and managing time.