Model the high-level design
Draw clients, API gateways, load balancers, services, databases, caches, queues and CDNs to explain the architecture end to end.
Diagrámalo
Turn complex ideas into system design.
My diagramming tool follows the classic system design framework: clarify requirements and scope the problem, propose a high-level design, deep dive into the critical components, and wrap up with trade-offs. Place clients, API gateways, load balancers, web and app servers, caches, SQL or NoSQL databases with replication and sharding, CDNs, and message queues to reason about scalability, availability, and consistency before writing a single line of code.
Category
Design · Diagramming
Surface
Web app
Audience
Eng · Arch · PM
01 / LOGO
SAFE AREA 1x
DIAGRAMALO
- PRIMARY
WAITLIST / PRO
Notify me when
Pro is ready.
Leave your email and I’ll let you know when the paid version of Diagrámalo is available.
CloudPro accessNo spam
It will be a cloud version with database-backed diagram saving, generation using artificial intelligence, and per-provider cost estimation (AWS, Azure, GCP, Vercel and more) with a written explanation of the design.
We’ll email you when Pro opens access. No weekly email blasts.
If it does not arrive in a few minutes, check spam or promotions.
§ 08 / POSITIONING
What does it do?
Designed to think through system design: requirements, estimates, APIs, data, scale, failures and trade-offs.
Map requirements to components
Turn functional and non-functional requirements into endpoints, data models, capacity, latency, availability and consistency.
Communicate technical trade-offs
Make decisions visible: cache vs database, SQL vs NoSQL, sync vs async, and strong vs eventual consistency.
Find bottlenecks
Spot single points of failure, read/write hotspots, fan-out, storage limits, saturated queues and critical paths.
Prepare interviews and reviews
Structure the explanation like a system design interview: scope, estimates, initial design, deep dives and evolution.
Pricing
§ 09 / PLANS
Free describes what you can already do on the web today. Pro will be the cloud version for more advanced workflows.
FREE / WEB
Free
The current web app already works as a free editor for practicing system design interviews, turning ideas into system design diagrams and exporting clear visuals.
Always free
$0
What’s included
- Web canvas for structuring system design answers: scope, requirements, APIs, data, services, scale and failure points.
- Ready-to-use components for system design diagrams: client, DNS, CDN, load balancer, API Gateway, services, database, cache, queues and storage.
- Layers, colors, icons, grid and PNG export by layer to separate views: high-level design, data flow, scalability and deep dives.
- Local autosave, restore on return, mobile controls and Spanish/English UI for practicing and explaining designs quickly.
Limitations
- Runs as a web version inside the browser.
- Saved work depends on the browser's local storage.
- Limited to 3 layers in the free version.
PRO / CLOUD
Pro
The cloud version that includes everything in Free, custom icon libraries, database-backed saving, AI generation, and per-provider cost estimation.
Cloud
Coming soon
What’s included
- Everything in the Free version, plus custom icon libraries for AWS, Azure, Vercel and other providers.
- Diagram export in PNG and JSON to save, share, or keep editing.
- Advanced layers as the main differentiator to separate high-level design, data flow, and technical details.
- Cloud database to save your diagrams and recover them from your account.
- Diagram generation using artificial intelligence from system descriptions, with a written explanation of the resulting design.
- Cost estimation for your design by provider (AWS, Azure, GCP, Vercel and more) with a breakdown that explains both the diagram and the costs.
Limitations
- Requires an internet connection.
- Requires an account to save diagrams in the cloud.
- AI features may have usage limits.