Does this run the TypeScript type checker?

No. It parses and prints TypeScript or TSX. A syntactically accepted file may still have type errors, missing declarations, or unresolved imports.

Is the output JavaScript?

No. Type annotations remain. Compile or transpile through your normal project toolchain when you need executable JavaScript output.

When should I choose TSX instead of auto?

Choose TSX when the source contains JSX markup or angle brackets that could otherwise be interpreted differently. The explicit mode makes the parser choice reviewable.

Web engineering

TypeScript & TSX Formatter

Format TypeScript and TSX using the same parser family as modern editor workflows.

Online tools Pricing

Input0 characters

Result0 characters

Prefer a native workflow?

Keep TypeScript & TSX Formatter one shortcut away.

DevSexy for Mac puts the same private workflow in a focused desktop app, with global shortcuts and no browser tab to manage.

Global shortcutOffline-readyLocal processing

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One angle bracket · two grammars

Tell the parser whether JSX is invited.

In a .ts file, angle brackets can participate in type syntax. In a .tsx file, the same tokens may begin JSX. Choosing TS or TSX first prevents a formatter from guessing at the most important boundary.

<T>

.ts · TypeScript

const value = <User>input

Legacy angle-bracket assertion is legal TypeScript.

.tsx · TypeScript + JSX

const view = <UserCard />

Angle brackets open JSX; use input as User for assertions.

Type-syntax specimen rail

Formatting should understand the syntax it preserves.

SYNTAX 01

Type-only import

import type { User } from './types'

SYNTAX 02

satisfies

const theme = raw satisfies Theme

SYNTAX 03

Generic constraint

function pick<T extends Entity>(value: T)

SYNTAX 04

Mapped type

type Flags<T> = { [K in keyof T]?: boolean }

SYNTAX 05

Conditional type

type Id<T> = T extends Entity ? string : never

SYNTAX 06

TSX props

const Card = (props: CardProps) => <article />

Formatter evidence

Parse first. Reprint the same program shape.

Source

Tokens, comments, types, and JSX arrive as text.

TypeScript parser

The selected grammar builds an abstract syntax tree.

Prettier printer

Repository-style line breaks and spacing are chosen.

Formatted source

Types and comments remain source; nothing executes.

Four boundaries

A green format result is not a green build.

Type-check

Can these types actually compose?

Next: tsc --noEmit

Lint

Does code follow semantic and repository rules?

Next: ESLint

Transpile

What JavaScript should target browsers receive?

Next: tsc / bundler

Execute

What does the program do at runtime?

Next: Tests / runtime

Repository parity

One-off cleanup should lead back to the codebase.

Browser

Select TS or TSX and inspect the one-off result.

Editor

Use format-on-save with the repository Prettier config.

Commit

Review the formatting diff without semantic changes.

CI

Run prettier --check beside lint and type-check gates.

Run a reproducible example

Format type annotations and TSX markup with the appropriate parser mode.

Using an example replaces the current input, reference input, operation, and options. Public demonstration data only.

Format an interface and typed object

Select TypeScript explicitly and use two-space indentation.

Input

interface User{name:string}const user:User={name:"Ada"}

The interface and annotation remain TypeScript source.

interface User {
name: string;
const user: User

Format a typed JSX component

Select TSX so angle-bracket markup is read as JSX.

Input

const Badge=({name}:{name:string})=><span>{name}</span>

The output retains the typed props and span expression; no type checker has been run.

name: string
<span>{name}</span>

Continue with a related task

JavaScript Beautifier & Minifier

Format or compress JavaScript with parser-backed diagnostics.

HTML/SVG to JSX/TSX

Convert markup attributes and component structure for React codebases.

JSON Schema & OpenAPI Studio

Validate instances against JSON Schema and inspect OpenAPI 3.1 structure.

Repeat the task in DevSexy for Mac

Use the native app for repeated offline work and direct Option shortcuts.

Direct answer

What is TypeScript & TSX Formatter?

Format TypeScript or TSX online with Prettier’s parser, choose the syntax explicitly, and keep type-checking, linting, transpilation, and execution separate.

What can it do?

Format

How to use TypeScript & TSX Formatter

01
Prepare the input
Choose TypeScript or TSX explicitly for ambiguous angle-bracket syntax.
02
Choose the operation
Set indentation and wrap width, then Format.
03
Review the evidence
Run tsc and application tests in the project to check types, imports, and component behavior.

Frequently asked questions

Does this run the TypeScript type checker?: No. It parses and prints TypeScript or TSX. A syntactically accepted file may still have type errors, missing declarations, or unresolved imports.
Is the output JavaScript?: No. Type annotations remain. Compile or transpile through your normal project toolchain when you need executable JavaScript output.
When should I choose TSX instead of auto?: Choose TSX when the source contains JSX markup or angle brackets that could otherwise be interpreted differently. The explicit mode makes the parser choice reviewable.