Documentation · head to head
MkDocs vs Preact
MkDocs
Documentation
Static site generator for project documentation in Markdown
- From
- Free
- Rated
- -
Preact
Web Development
3kB alternative to React with the same modern API
- From
- Free
- Rated
- -
The short version
- Each has a real cost: MkDocs no built-in versioning, which Docusaurus provides and documentation teams eventually need; Preact compatibility through preact/compat is good but not total, and some React libraries break in ways that are hard to diagnose
- They diverge on capability: MkDocs covers Plain Markdown, Preact covers 3kB runtime.
- Prices and features above were last checked on 29 August 2026.
Where they differ
Only the attributes on which MkDocs and Preact actually diverge.
Identical on both: starting price (Free), pricing model (Open source, no licence fee), free tier (Yes), user rating (Not yet rated).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in MkDocs
- Plain Markdown
- Single YAML config
- Material theme
- Live preview
Only in Preact
- 3kB runtime
- preact/compat
- Same modern API
- Fast rendering
What people use each for
The jobs each tool is most often brought in to do.
MkDocs
- Project documentation for teams that would rather not run a JavaScript toolchainnot Preact
- Python projects keeping docs beside the codenot Preact
- Documentation that must build fast in CI on every commitnot Preact
Preact
- Embedded widgets that load inside someone else’s page and must stay smallnot MkDocs
- Marketing and content sites where JavaScript payload affects Core Web Vitalsnot MkDocs
- Applications targeting low-bandwidth or low-powered devicesnot MkDocs
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
MkDocs
- No built-in versioning, which Docusaurus provides and documentation teams eventually need
- Extending past the theme means writing Python plugins
- Markdown only, so embedding interactive components is not the model
Preact
- Compatibility through preact/compat is good but not total, and some React libraries break in ways that are hard to diagnose
- Behavioural differences from React exist in edge cases, particularly around event handling
- A much smaller community, so unusual problems have fewer existing answers than React
Pricing, plan by plan
MkDocs
Free- MkDocsFree
- Full functionality
- Commercial use permitted
- Community support
Preact
Free- PreactFree
- Full library
- Commercial use permitted
- No usage limits
Which should you pick?
Choose MkDocs if
- You need plain markdown.
- You want to start without paying.
- You work on Web, Linux, macOS, Windows.
- You also want single yaml config.
Choose Preact if
- You need 3kb runtime.
- You want to start without paying.
- You also want preact/compat.
Questions people ask
- Is MkDocs or Preact better?
- Neither clearly leads. MkDocs starts at Free and Preact at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, MkDocs or Preact?
- MkDocs starts at Free and Preact at Free.
- Does MkDocs or Preact run on more platforms?
- MkDocs runs on Web, Linux, macOS, Windows. Preact runs on Web.
- Can I use MkDocs for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is MkDocs best used for?
- MkDocs is most often used for project documentation for teams that would rather not run a javascript toolchain, python projects keeping docs beside the code, documentation that must build fast in ci on every commit. Of those, project documentation for teams that would rather not run a javascript toolchain and python projects keeping docs beside the code are not what Preact is typically brought in for.
- What can MkDocs do that Preact cannot?
- MkDocs covers Plain Markdown, Single YAML config, Material theme, Live preview. Preact covers 3kB runtime, preact/compat, Same modern API, Fast rendering.
Answered from the vendors’ own pages
MkDocs: Is MkDocs free?
Yes, open source under the BSD licence. The Material theme has a free version and a paid Insiders edition.
Preact: Is Preact free?
Yes, open source under the MIT licence.
MkDocs: MkDocs or Docusaurus?
MkDocs is simpler and faster to adopt, especially for Python teams. Docusaurus offers versioning, internationalisation and React components, which matter once documentation grows.
Preact: Can I use React libraries with Preact?
Most, through the preact/compat layer. Compatibility is good but not complete, so libraries relying on React internals can break.
MkDocs: Does MkDocs support versioned docs?
Not natively. Plugins such as mike add it, where Docusaurus includes versioning in core.
Preact: Why choose Preact over React?
Bundle size, almost always. If payload is not a binding constraint, React’s ecosystem is usually the better trade.
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- Preact vs TanStack Start
- Preact vs Alpine.js
- Preact vs Astro
- Preact vs Carrd