Diagram Preview Tools for Developers

Generate Mermaid diagrams from a natural language prompt with AI.

Convert product notes, incidents, and architecture text into Mermaid diagrams.

Fix broken Mermaid syntax and improve diagram readability with AI.

Generate Mermaid architecture diagrams from product or system notes with AI.

Generate PlantUML diagrams from natural language with DeepSeek.

Generate editable diagrams.net / draw.io XML from architecture, CI/CD, and data flow prompts.

Generate Grafana dashboard JSON for Prometheus, Loki, Node Exporter, API, and Kubernetes monitoring.

Generate Prometheus alert rules YAML for APIs, infrastructure, Kubernetes, databases, and queues.

Generate Grafana dashboard YAML, Prometheus rules, Mermaid architecture, and a runbook checklist with AI.

Convert OpenAPI paths into a Mermaid sequence diagram locally.

Turn API status codes, failure conditions, retry rules, and recovery actions into a clear error flow diagram.

Postman Collection to Sequence Diagram: Convert Postman collection JSON into a readable API request sequence diagram.

HAR File to Sequence Diagram: Turn browser Network HAR exports into request sequence diagrams for debugging and documentation.

Preview HAR request timelines, status codes, slowest calls, and host breakdowns.

Convert PlantUML sequence, component, class, and activity diagrams into editable draw.io / diagrams.net XML.

Convert CREATE TABLE SQL into a Mermaid ER diagram.

Inspect JSON Schema properties, types, required fields, and composition groups.

Turn JSON Schema properties, required fields, enums, and formats into a form preview.

Run common JSONPath expressions against API responses and inspect matched values.

Run common jq-style filters against JSON and preview the filtered result.

Test XPath expressions against XML or HTML and inspect matched nodes.

Preview YAML path lookups for Kubernetes, Helm, GitHub Actions, and config files.

Inspect TOML sections, keys, and values from pyproject, Cargo, and app config files.

Visualize package.json dependencies, devDependencies, peerDependencies, and optionalDependencies.

Convert Mermaid diagrams to editable draw.io / diagrams.net XML from Markdown, README, or AI-generated source.

Convert Docker Compose services and dependencies into a readable architecture diagram.

Visualize Terraform resource blocks and references as a software architecture diagram.

CloudFormation Template Diagram: Visualize AWS CloudFormation resources and references from template YAML or JSON.

Inspect Kubernetes manifests as resource trees for deployments, services, ingress, labels, and namespaces.

Visualize Ingress, Service, Deployment, and Pod relationships from Kubernetes YAML.

Turn GitHub Actions YAML jobs, needs, and steps into a readable workflow diagram.

Generate a pipeline diagram from GitHub Actions, GitLab CI, or simple step lists.

C4 Model Diagram Generator: Generate C4-style system context, container, and component diagrams from simple text.

Turn regular expressions into simple railroad-style diagrams for documentation and code review.

Visualize cron fields, schedule intent, and documentation notes.

Decode JWT header, payload, signature, and claims into a readable diagram.

Visualize Dockerfile build stages and instructions as a step-by-step diagram.

Inspect Helm values.yaml as an expandable structure for chart review and documentation.

Visualize nginx server, location, proxy_pass, and upstream relationships.

Test Nginx location precedence for exact, prefix, ^~, and regex routing blocks.

Compare .env with .env.example and find missing, empty, or duplicate variables.

Parse HTTP response headers and review cache, CORS, content type, and security hints.

Preview HTML components, email snippets, and landing sections in a script-blocked sandbox.

Convert a webpage URL or pasted HTML into clean Markdown for docs, notes, AI prompts, and migration work.

Preview CSS linear, radial, conic, and repeating gradients with extracted color stops.

Compare two JSON payloads and inspect added, removed, and changed paths.

Preview Base64 image strings and data URLs with MIME type and size analysis.

Preview CSS box-shadow values on realistic cards and compare shadow layers.

Preview hex, rgb, hsl, and CSS variable palettes with adjacent contrast checks.

Parse cURL commands into method, URL, headers, query parameters, and request body preview.

Decode URL query strings, inspect UTM parameters, and review API query payloads.

Convert OpenTelemetry spans JSON into a Mermaid sequence diagram for request flow review.

Turn simple service call logs into a Mermaid sequence diagram.

Visualize GraphQL types, inputs, interfaces, fields, and relationships.

TypeScript Interface Visualizer: Visualize TypeScript interfaces, type aliases, fields, and references for API and SDK docs.

Zod Schema Visualizer: Visualize Zod object schemas, validators, and validation documentation structure.

Visualize protobuf messages, fields, and message references as a class diagram.

Convert AsyncAPI channels into producer, channel, and consumer event flow diagrams.

Convert DBML table definitions and refs into a Mermaid ER diagram.

Convert Prisma model blocks into an ER-style schema diagram.

Preview uncompressed diagrams.net / draw.io XML as SVG and export the rendered result.

Inspect XML documents as a readable tree for feeds, SVG snippets, configs, and integration payloads.

Preview CSV files as row and column trees for lightweight data inspection.

Paste SVG markup or a data URI, preview it safely, and export cleaned SVG.

Preview og:title, og:description, og:image, Twitter cards, and social share snippets.

Test robots.txt Allow and Disallow rules for a target URL.

Preview sitemap XML URLs, sitemap indexes, duplicates, lastmod, and hreflang alternates.

Preview D2 architecture diagrams and service maps in a focused workspace.

Open draw.io and diagrams.net XML files online before sharing or converting them.

Turn Markdown headings or indented text into a mind map workspace.

Visualize JSON as a readable object and array tree.

Visualize YAML documents as readable tree diagrams.