ArchGen

Web Application Architecture Template

A ready-to-use web application architecture diagram template covering auth, APIs, data, and observability. Also works as a block diagram or system diagram for web apps.

Generate system diagrams, system block diagrams, and software architecture diagrams from text.

Preview
Template: Web AppStyle: Dark
Use this template
Web Application System Architecture (Auth + APIs + Data + Observability) has 4 layers: Edge & Client, API & Core Services, Data & Messaging, Platform & Observability.

Style gallery

Pick a style and jump straight into generation.

Clean
Best for product docs and software architecture diagrams.
DocsSpecs
Use Clean
Classic
Enterprise reviews and system architecture diagram templates.
EnterpriseReview
Use Classic
Dark
Low-light presentations and technical briefings.
DecksBriefing
Use Dark
Hand
Workshop whiteboarding and early-stage discovery.
WorkshopIdeation
Use Hand
Blueprint
Blueprint-style architecture reviews.
BlueprintReview
Use Blueprint
Brutal
Bold internal narratives and strategic alignment.
StrategyBold
Use Brutal
Soft
Storytelling decks and stakeholder updates.
StoryStakeholders
Use Soft
Glass
Pitch-ready visuals for demos and sales.
PitchDemo
Use Glass
Terminal
Infra, ops, and observability handoffs.
OpsInfra
Use Terminal
Corp
Formal stakeholder updates and compliance decks.
FormalCompliance
Use Corp

What you get

  • Layered architecture blocks with clear responsibilities.
  • Ready-to-edit module names and duty lists.
  • Key flows to explain system behavior quickly.
  • A block diagram of a web application architecture for quick overviews.
  • All supported styles in a single template page.
  • Shareable links for team reviews and feedback.
  • Instant export to high-resolution PNG.

How to use this template

  1. Pick a style from the gallery above.
  2. Generate your diagram and edit titles or modules.
  3. Export a PNG or share the diagram link.

Default structure

This architecture diagram template uses default layers: Edge & Client, API & Core Services, Data & Messaging, Platform & Observability.

Who it's for

  • SaaS product teams
  • Startup founders and technical PMs
  • Solution architects and engineers

Who it's not for

  • Hardware-only systems without web layers
  • Highly regulated core banking systems

Best for

  • SaaS MVP planning
  • Internal platforms and tooling
  • Investor or stakeholder architecture decks

Key layers

Show 4 layersClick to expand
  • Edge & Client: Modules include Web Client, CDN & WAF, Auth & Identity.
  • API & Core Services: Modules include API Gateway, User Service, Content Service, Search Service.
  • Data & Messaging: Modules include Transactional Database, Cache Layer, Event Bus, Object Storage.
  • Platform & Observability: Modules include CI/CD Pipeline, Monitoring & Logging, Security & Compliance.

Module responsibilities

Show 14 itemsClick to expand
  • Edge & Client / Web Client: Render UI; Call APIs securely; Handle client navigation
  • Edge & Client / CDN & WAF: Reduce latency; Block malicious traffic; Shield origin
  • Edge & Client / Auth & Identity: Authenticate users; Issue JWTs; Manage sessions
  • API & Core Services / API Gateway: Enforce policies; Route traffic; Aggregate endpoints
  • API & Core Services / User Service: Manage identities; Authorize requests; Emit user events
  • API & Core Services / Content Service: Serve content; Validate payloads; Publish updates
  • API & Core Services / Search Service: Build indexes; Serve search results; Track query analytics
  • Data & Messaging / Transactional Database: Guarantee ACID writes; Support OLTP queries; Maintain backups
  • Data & Messaging / Cache Layer: Reduce latency; Protect databases; Store ephemeral data
  • Data & Messaging / Event Bus: Decouple services; Buffer spikes; Guarantee delivery
  • Data & Messaging / Object Storage: Store blobs; Serve assets; Archive data
  • Platform & Observability / CI/CD Pipeline: Automate releases; Scan artifacts; Promote to prod
  • Platform & Observability / Monitoring & Logging: Track SLOs; Detect incidents; Enable debugging
  • Platform & Observability / Security & Compliance: Protect credentials; Enforce least privilege; Track access trails

Key flows

Show 3 flowsClick to expand
  • Login flow: a user hits the CDN/WAF, completes OAuth2/OIDC authentication, receives JWTs, and the API Gateway validates tokens before calling the User Service and PostgreSQL.
  • Content flow: the UI uploads media to S3 via signed URLs, Content Service writes metadata to PostgreSQL, emits events to Kafka, and the Search Service indexes updates in Elasticsearch for fast discovery.
  • Operational flow: CI/CD ships new containers through ArgoCD, while OpenTelemetry traces and logs stream to Datadog/Grafana for SLO tracking and alerting.

Template prompt

System architecture diagram for a modern web application. Users access a React/Next.js UI through a CDN with TLS termination and WAF protection. Authentication uses OAuth2/OIDC with MFA and JWT access tokens. Requests flow through an API gateway to core services (User, Content, Search) running in containers with autoscaling. Data storage includes PostgreSQL for transactions, Redis for session and cache, Elasticsearch for search, and S3 for media uploads. Use Kafka for async jobs and event-driven updates. Add CI/CD with GitHub Actions and ArgoCD, plus monitoring with OpenTelemetry, Datadog, and centralized logging. Highlight RBAC, rate limiting, and audit trails.

Recommended tweaks

  • Add background jobs and a scheduler
  • Insert a queue for async workflows
  • Introduce feature flags and A/B testing
  • Add analytics warehouse and BI layer
  • Swap auth to SSO or enterprise IAM
  • Annotate it as a software/system architecture diagram for stakeholders.

FAQ

  • Is this good for MVPs?
    Yes. Start with fewer modules and expand as you scale.
  • Can I use this for multi-tenant SaaS?
    Yes. Add tenant isolation at the data layer and tenant-aware auth.
  • Monolith or microservices?
    Either. Group modules into one service or split by domain.
  • Does this cover compliance and audit needs?
    Add audit logging, data retention, and policy controls in the security layer.
  • Can I deploy this on-prem or in hybrid cloud?
    Yes. Swap the infra modules to match your hosting environment.
  • How do I handle multi-region deployments?
    Add global traffic management, data replication, and regional failover.
  • Which style should I pick?
    Use Clean or Classic for docs, Glass for decks, Terminal for ops.
  • Can I start small and scale later?
    Yes. Keep the layer boundaries and scale each module as demand grows.