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Developer Tools · head to head

Prettier vs Swagger UI

Prettier logo

Prettier

Developer Tools

Opinionated code formatter

From
Free
Rated
-
Full reviewWebsite
Swagger UI logo

Swagger UI

Developer Tools

Interactive API documentation generated from OpenAPI specs

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Prettier inflexible style rules that cannot be customized significantly, forcing teams to accept opinionated defaults; Swagger UI only as good as the specification: a thin OpenAPI file produces thin documentation
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Prettier and Swagger UI actually diverge.

Attributes where Prettier and Swagger UI differ
AttributePrettierSwagger UI
Pricing modelfreeOpen source, no licence fee
PlatformsCLI, Editor Plugins, Build ToolsWeb, Self-hosted, Docker
Founded2016Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Developer Tools).

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 Prettier

Nothing recorded that Swagger UI does not also cover.

Only in Swagger UI

  • OpenAPI rendering
  • Try it out
  • Schema display
  • Self-hostable

What people use each for

The jobs each tool is most often brought in to do.

Prettier

  • Automatically formatting TypeScript files to project style standardsnot Swagger UI
  • Enforcing consistent HTML indentation across component filesnot Swagger UI
  • Removing style-related comments from pull request reviewsnot Swagger UI
  • Formatting GraphQL queries with consistent indentationnot Swagger UI

Swagger UI

  • Publishing API documentation that stays in step with the specificationnot Prettier
  • Letting developers try endpoints before writing any client codenot Prettier
  • Internal API discovery across teamsnot Prettier

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Prettier

  • Inflexible style rules that cannot be customized significantly, forcing teams to accept opinionated defaults
  • Developers must format entire files rather than selective line ranges in some contexts
  • Limited language support compared to some alternatives, though it covers major languages

Swagger UI

  • Only as good as the specification: a thin OpenAPI file produces thin documentation
  • Default presentation is dated compared with modern documentation tools
  • Large specifications render slowly and become hard to navigate
  • Try it out against production needs care with authentication and CORS, and is often disabled as a result

Pricing, plan by plan

Prettier

Free

No published plan breakdown. See the Prettier review.

Swagger UI

Free
  • Swagger UIFree
    • Full functionality
    • Commercial use permitted
    • Community support

Which should you pick?

Choose Prettier if

  • You want to start without paying.
  • You work on CLI, Editor Plugins, Build Tools.
Prettier review

Choose Swagger UI if

  • You need openapi rendering.
  • You want to start without paying.
  • You work on Web, Self-hosted, Docker.
  • You also want try it out.
Swagger UI review

Questions people ask

Is Prettier or Swagger UI better?
Neither clearly leads. Prettier starts at Free and Swagger UI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Prettier or Swagger UI?
Prettier starts at Free and Swagger UI at Free.
Does Prettier or Swagger UI run on more platforms?
Prettier runs on CLI, Editor Plugins, Build Tools. Swagger UI runs on Web, Self-hosted, Docker.
Can I use Prettier for free?
Both have a free tier, so you can try either at no cost before committing.
What is Prettier best used for?
Prettier is most often used for automatically formatting typescript files to project style standards, enforcing consistent html indentation across component files, removing style-related comments from pull request reviews, formatting graphql queries with consistent indentation. Of those, automatically formatting typescript files to project style standards and enforcing consistent html indentation across component files are not what Swagger UI is typically brought in for.
What can Prettier do that Swagger UI cannot?
Swagger UI covers OpenAPI rendering, Try it out, Schema display, Self-hostable.

Answered from the vendors’ own pages

Prettier: Is Prettier free and open source?

Yes, Prettier is completely free and open source, available as an npm package with no licensing costs or subscriptions.

Source
Swagger UI: Is Swagger UI free?

Yes, open source under the Apache 2.0 licence. SmartBear sells commercial SwaggerHub separately.

Prettier: Can Prettier be integrated with ESLint?

Yes, Prettier integrates with ESLint by disabling ESLint formatting rules via eslint-config-prettier, allowing both tools to work together with Prettier handling formatting and ESLint handling code quality.

Source
Swagger UI: What is the difference between Swagger and OpenAPI?

OpenAPI is the specification format; Swagger is the toolset around it, including Swagger UI. The specification was renamed from Swagger to OpenAPI in 2016.

Prettier: Does Prettier support configuration customization?

Prettier is intentionally opinionated with limited configuration options to enforce consistency. You can create a .prettierrc file for basic customization, but Prettier does not support extensive rule customization like ESLint.

Source
Swagger UI: Can Swagger UI make real API calls?

Yes, through its try-it-out control, though authentication and CORS configuration often mean it is disabled for production APIs.

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