# Zero-auth architecture tools that turn search traffic into real product discovery.

Every tool is browser-first, deterministic, and tied to a real Architecto workflow. Use them standalone, export the result, then jump into the matching product module when you need the full operating surface.

## Public tools

- **Tool categories:** 20
- **Auth required:** None
- **Output formats:** Copy, share, export

## Planning and reliability

### 4 tools in planning and reliability

Planning and reliability tools that connect directly to Architecto workflows.

**CIDR / Subnet Calculator**  
Model VPCs, landing zones, and segmented networks with a deterministic subnet calculator built for architects and platform teams.  
[CIDR Subnet Calculator](/content/en/free-tools/cidr-subnet-calculator/index.html)

**RTO / RPO Calculator**  
Estimate recovery time and recovery point objectives with transparent assumptions your engineering and business teams can review together.  
[RTO RPO Calculator](/content/en/free-tools/rto-rpo-calculator/index.html)

**SLO / Error Budget Calculator**  
Work out monthly, quarterly, and annual error budgets for critical services and tie them back to release, incident, and support policies.  
[SLO Error Budget Calculator](/content/en/free-tools/slo-error-budget-calculator/index.html)

**Architecture Review Checklist Builder**  
Build repeatable review packets for cloud architectures, migrations, data systems, and internal platforms without relying on static spreadsheets.  
[Architecture Review Checklist](/content/en/free-tools/architecture-review-checklist-builder/index.html)

## Cost and capacity

### 4 tools in cost and capacity

Cost and capacity tools that connect directly to Architecto workflows.

**AWS Cost Estimator Lite**  
Get fast directional cost estimates for common AWS architectures without waiting on procurement spreadsheets or full FinOps tooling.  
[AWS Cost Estimator](/content/en/free-tools/aws-cost-estimator-lite/index.html)

**Kubernetes Capacity Calculator**  
Plan worker capacity for Kubernetes workloads and turn pod requirements into node counts and utilization targets with clear assumptions.  
[Kubernetes Capacity Calculator](/content/en/free-tools/kubernetes-capacity-calculator/index.html)

**EKS Node Sizing Calculator**  
Estimate node group counts, pod density, and instance tradeoffs for EKS clusters with managed add-ons, multi-AZ layouts, and headroom.  
[EKS Node Sizing Calculator](/content/en/free-tools/eks-node-sizing-calculator/index.html)

**Database Capacity Planner**  
Estimate table growth, index amplification, backup retention, and IOPS needs before a production database becomes a fire drill.  
[Database Capacity Planner](/content/en/free-tools/database-capacity-planner/index.html)

## Schema and data

### 4 tools in schema and data

Schema and data tools that connect directly to Architecto workflows.

**SQL DDL to ER Diagram**  
Turn raw CREATE TABLE statements into an ER-style map with tables, relationships, field counts, and exportable Mermaid syntax.  
[SQL DDL to ER Diagram](/content/en/free-tools/sql-ddl-to-er-diagram/index.html)

**DBML to SQL Converter**  
Start with DBML and export SQL definitions your teams can review, version, and import into broader architecture workflows.  
[DBML to SQL Converter](/content/en/free-tools/dbml-to-sql-converter/index.html)

**JSON Schema to Table Diagram**  
Explore how nested JSON structures map into tables, repeated entities, and relationship candidates before you start physical database design.  
[JSON Schema to Table Diagram](/content/en/free-tools/json-schema-to-table-diagram/index.html)

**Schema Diff Checker**  
Detect adds, drops, and column modifications across DDL or DBML inputs so reviews focus on actual risk instead of guesswork.  
[Schema Diff Checker](/content/en/free-tools/schema-diff-checker/index.html)

## IaC and inventory

### 4 tools in IaC and inventory

IaC and inventory tools that connect directly to Architecto workflows.

**Terraform Module Visualizer**  
Map resources, providers, modules, and outputs from Terraform files into a readable dependency view for reviewers and platform engineers.  
[Terraform Module Visualizer](/content/en/free-tools/terraform-module-visualizer/index.html)

**Kubernetes YAML Visualizer**  
Read Deployments, Services, Ingresses, StatefulSets, and ConfigMaps as one system view instead of a folder full of YAML files.  
[Kubernetes YAML Visualizer](/content/en/free-tools/kubernetes-yaml-visualizer/index.html)

**Docker Compose Diagrammer**  
Quickly explain local platform topologies, integration stacks, and migration candidates by turning compose files into a visual dependency map.  
[Docker Compose Diagrammer](/content/en/free-tools/docker-compose-diagrammer/index.html)

**Tagging Policy Builder**  
Generate cloud tagging standards with required keys, ownership fields, environment rules, and implementation snippets for policy docs or IaC modules.  
[Tagging Policy Builder](/content/en/free-tools/tagging-policy-builder/index.html)

## Security and operations

### 4 tools in security and operations

Security and operations tools that connect directly to Architecto workflows.

**STRIDE Threat Checklist**  
Walk through spoofing, tampering, repudiation, information disclosure, denial of service, and elevation risks using a deterministic system model.  
[STRIDE Threat Checklist](/content/en/free-tools/stride-threat-checklist/index.html)

**Security Group Rule Visualizer**  
See inbound and outbound exposure patterns across security group rules before a review turns into line-by-line spreadsheet work.  
[Security Group Visualizer](/content/en/free-tools/security-group-rule-visualizer/index.html)

**Compliance Control Matrix Builder**  
Generate pragmatic control matrices for SOC 2, ISO 27001, PCI DSS, and internal governance programs using workload-specific assumptions.  
[Compliance Control Matrix](/content/en/free-tools/compliance-control-matrix-builder/index.html)

**Incident Runbook Template Builder**  
Build operational runbooks for web incidents, data issues, Kubernetes failures, or cloud access events with deterministic structure and export-ready Markdown.  
[Incident Runbook Template](/content/en/free-tools/incident-runbook-template-builder/index.html)