v1.0.0 — Production Ready

Design IDL
Visually

The modern way to create DDS data models.
Drag-and-drop, real-time validation, production-ready IDL.

Download Free Try Online View Pricing

✓ 60+ validation rules

✓ Round-trip IDL

✓ IDL 4.2 compliant

HDDS Studio — MyProject.hddsgraph

Sensor

Status

Reading

[Demo GIF: drag-drop struct creation]

The Old Way vs The Studio Way

Stop hunting for syntax errors. See your data model clearly.

✗

BEFORE

module Sensors {
  struct Reading {
    @key
    long sensor_id;
    double value;
    // typo: timestap
    long timestap;
  };
};

⚠

Syntax error at compile time

Error discovered 10 minutes later...

✓

AFTER

Reading

🔑 sensor_id

• value

• timestamp ✓

✓

Valid IDL 4.2

Real-time validation as you design

Features

Everything you need to design, validate, and export IDL data models.

🎨

Visual Editing

Drag-and-drop structs, enums, unions, modules. See your data model at a glance.

🔍

Real-Time Validation

60+ IDL 4.2 compliance rules. Catch errors instantly, not at compile time.

📦

Import/Export IDL

Round-trip fidelity guaranteed. Import existing IDL, export production-ready code.

⚡

Auto-Layout

Pro

ELK algorithm positions 1000+ nodes in <3s. Perfect organization, zero effort.

↺

Undo/Redo

100-level history. Experiment freely, roll back anytime.

🌙

Dark Mode

Pro

Multiple themes including TRON-inspired dark mode. Easy on the eyes.

🛠

Code Generation

Pro

Generate Rust, C++, Python from your IDL. One-click scaffolding.

📊

Dependency Graph

Visualize type relationships at a glance. Understand complex models instantly.

💾

Project Files

Save/load .hddsgraph files. Version control friendly JSON format.

All IDL Types Supported

Full IDL 4.2 specification support. Every type, every annotation.

Struct

Data containers with typed fields

Union

Discriminated unions

Enum

Enumerated constants

Typedef

Type aliases

Sequence

Dynamic arrays

Array

Fixed-size arrays

Map

Key-value containers

Module

Namespaces

Constant

Compile-time values

+ Annotations

@key @topic @default @bit_bound @optional @external @nested @appendable @mutable @final +50 more...

Pricing

Start free, upgrade when you need more power.

Community

FREE

Perfect for learning and small projects

✓ 100 nodes max
✓ Import IDL
✓ Export IDL
✓ Real-time validation
✗ Auto-layout
✗ Code generation
✗ Multiple themes

Download

Pro

$99 /month

$990/year (save 17%)

For professional developers and teams

✓ Unlimited nodes
✓ Everything in Community
✓ Auto-layout (ELK)
✓ Code generation (Rust, C++, Python)
✓ All themes
✓ Project files
✓ Priority updates

Start Free Trial

Enterprise

Coming Soon

$499 /month

For organizations with advanced needs

✓ Everything in Pro
✓ Minimum 5 seats
✓ Priority support
✓ Custom branding
✓ SSO/LDAP integration
✓ On-premise deployment
✓ SLA guarantee

Join Waitlist

🎁 30-day Trial: All Pro features, no credit card required

Power-Ups

Extend Studio with industry templates and AI capabilities.

⚠ Coming in v1.3+

🏭

Industry Packs

$49/month

Pre-built IDL templates for your domain. Start with proven patterns.

● ROS2 Messages
● Defense (NGVA, STANAG)
● Medical (HL7 FHIR)
● Automotive (AUTOSAR)
● Space (CCSDS)

🤖

AI Power-Ups

$29/month

AI-assisted development for faster, smarter IDL design.

★

IDL Copilot

AI-assisted type design
★

Performance Oracle

Optimization suggestions
★

Migration Wizard

Upgrade legacy IDL

Professional Services

Expert support to accelerate your DDS projects.

Service	Price
White Glove Onboarding Hands-on setup and training for your team	$5,000
Type System Audit Expert review of your IDL architecture	$15,000
Compliance Package DO-178C, ISO 26262, or domain-specific compliance	$25,000
HDDS Certified Developer Individual certification exam	$299
Enterprise Training On-site training for up to 20 developers	$15,000

Contact Sales for Custom Packages

Stop writing IDL by hand.

Join thousands of developers who design data models visually.

Download Studio Start Free Trial

🐧

Linux



macOS

💻

Windows

Single binary, no dependencies. Runs offline.

Design IDL Visually