OnUML Pricing 2026
Complete pricing guide for OnUML — plans, costs, and free options.
💰 OnUML Pricing Overview
OnUML uses a freemium pricing model. Free tier available with optional paid upgrades. Current pricing: Usable free with no registration on a limited basis; registered users can claim 5 credits daily. Paid tier figures are not published as static text on the site — the pricing table renders client-side — so no per-tier prices are recorded here rather than guessed.. OnUML is a popular design & ui/ux tool known for ai diagram workspace for mermaid, plantuml, and draw.io with one-click repair for broken syntax. You can get started with OnUML for free and upgrade to a paid plan as your needs grow.
🔍 Compare Before You Buy
Comparing OnUML to similar tools helps you make the best choice for your budget and needs:
Lucidchart
FreemiumIntelligent diagramming for flowcharts, org charts & ERDs — 70M users
Free plan + paid from $9/month
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OnUML Plans & Pricing
Plan
* Pricing information is based on publicly available data and may not reflect current promotions, annual discounts, or regional pricing. Visit the official OnUML website for the latest pricing.
Is OnUML Free?
OnUML offers a free tier that lets you try the platform without any payment. The free plan typically includes core features with usage limits. For power users, paid plans unlock additional features, higher limits, and priority support.
Is OnUML Worth It?
OnUML is a freemium design & ui/ux tool that offers 6 key features including Generates Mermaid, PlantUML, and Draw.io diagrams from text or an image, Real-time render alongside an editable code view, Draw.io canvas editing with drag, drop, connect, resize, and built-in shapes. OnUML is a browser workspace that generates and edits diagrams across three formats that usually live in three separate tools: Mermaid, PlantUML, and Draw.io. You supply text or an image as the source and AI drafts the diagram, then you refine it either through further prompts or by editing the underlying code, with the render updating in real time so code and picture stay in view together. The format split is treated as a deliberate choice rather than a detail — Mermaid for lightweight documentation-driven diagrams, PlantUML for formal UML and technical modelling, and Draw.io flows for visual architecture and whiteboard-style planning with drag, drop, connect, and resize on the canvas and a rich built-in shape library. Two things push it past being a thin wrapper. First, it supports a proper mind-map diagram type built for structured thinking rather than relying on the cramped mind-map syntax inside PlantUML or Mermaid, and mind-map nodes can be added and moved directly on the page without going back to code. Second, there is one-click AI repair for broken diagram code: paste PlantUML or Mermaid that fails to render and it fixes the syntax so you can continue instead of hand-debugging. Everything exports from the same workspace, and the tool is usable free with no registration.
✅ OnUML is a good choice if you need:
- •Generates Mermaid, PlantUML, and Draw.io diagrams from text or an image
- •Real-time render alongside an editable code view
- •Draw.io canvas editing with drag, drop, connect, resize, and built-in shapes
- •Dedicated mind-map diagram type with direct on-page node editing
- •One-click AI repair for broken PlantUML or Mermaid syntax
💡 Value Assessment
With a free tier available, OnUML is an easy recommendation for anyone looking to try design & ui/ux tools without financial commitment. The paid plans offer good value for power users who need the additional features and higher usage limits.
OnUML Key Features
OnUML comes packed with features that make it a strong contender in the design & ui/ux space. Here's what you get:
Powered by advanced AI models, OnUML delivers intelligent image generation capabilities.
Available in the free plan with limits — Real-time render alongside an editable code view helps you work more efficiently with OnUML.
Connect with your existing tools and services for a unified workflow.
Available in the free plan with limits — Dedicated mind-map diagram type with direct on-page node editing helps you work more efficiently with OnUML.
Powered by advanced AI models, OnUML delivers intelligent content generation capabilities.
Powered by advanced AI models, OnUML delivers intelligent content generation capabilities.
OnUML Alternatives & Their Pricing
Considering alternatives to OnUML? Here's how competing tools compare on pricing:
Lucidchart
FreemiumIntelligent diagramming for flowcharts, org charts & ERDs — 70M users
Pricing: Free (3 documents, 60 shapes). Individual $9/mo, Team $10/user/mo, Enterprise custom
Ready to try OnUML?
Visit the official website for the latest pricing and to get started.
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Get a Sponsored Badge →Frequently Asked Questions
Is OnUML free to use?
Yes, OnUML offers a free tier that you can use without paying. Paid plans starting at Usable free with no registration on a limited basis; registered users can claim 5 credits daily. Paid tier figures are not published as static text on the site — the pricing table renders client-side — so no per-tier prices are recorded here rather than guessed. unlock additional features and higher usage limits.
How much does OnUML cost in 2026?
As of 2026, OnUML pricing is: Usable free with no registration on a limited basis; registered users can claim 5 credits daily. Paid tier figures are not published as static text on the site — the pricing table renders client-side — so no per-tier prices are recorded here rather than guessed.. Pricing may vary based on billing cycle (monthly vs annual) and region. Visit the official OnUML website for the most current pricing.
What is the cheapest OnUML plan?
The cheapest option is the free tier. If you need premium features, the most affordable paid plan is Plan at Usable free with no registration on a limited basis; registered users can claim 5 credits daily. Paid tier figures are not published as static text on the site — the pricing table renders client-side — so no per-tier prices are recorded here rather than guessed..
What are the best alternatives to OnUML?
Popular alternatives to OnUML include Lucidchart. Each offers different features and pricing structures. Compare them on AISO Tools to find the best fit for your needs and budget.
Is OnUML worth the price?
OnUML is well-regarded in the design space, offering features like Generates Mermaid, PlantUML, and Draw.io diagrams from text or an image, Real-time render alongside an editable code view, Draw.io canvas editing with drag, drop, connect, resize, and built-in shapes. Whether it's worth the investment depends on your specific needs, usage volume, and budget. The free tier lets you try it before committing to a paid plan.
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