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prettier · typescript · jsx · live · client-side

Format TSX with Prettier

Prettier's typescript parser handles React TSX — props, generics, JSX attributes, conditional types, the lot. Runs locally.

TSX Formatter
Input
165 B
3 lines
Output
0 B
1 lines
Status
loading
parser…
Ratio
0.00×
out/in
input · tsx
output · formatted tsx
Loading parser…
Quick Start

How to format TSX

Prettier's typescript parser understands TS-with-JSX. Generics, satisfies clauses, conditional types, and JSX expressions are all reformatted with one pass.

  1. 01

    Paste TSX

    React component, hook, util — TS or TSX file.

    Parsing runs through Prettier’s standalone bundle (or the language-specific equivalent) loaded lazily — no parser ships until the tool is opened.

    tsxPrettierASTstandalonelazy
    input · sourceraw · AST
    const A=()=><div/>
    loaded · parsedAST · ready
  2. 02

    Tune options

    Tab, width, semi, and single-quote control the standard Prettier knobs.

    Indent width, tab style, and print-width re-format through a memoised pass — switching 2 → 4 spaces never re-parses, only re-prints.

    optsindentprint-widthmemoisedlive
    opts · optionsprettier · live
    tab=2 width=80
    options applied · livelive
  3. 03

    JSX reflows

    JSX attributes wrap when they exceed print width; long expressions split across lines.

    The formatter is deterministic and idempotent: running it twice produces byte-identical output, which keeps diffs and git noise to a minimum.

    liveidempotentdeterministicdiff-cleanstable
    out · formattedpretty · ready
    <A
  x={1}
/>
    formatted · liveidempotent
  4. 04

    Copy or save

    Output goes to clipboard or a .tsx file. Source stays in your browser.

    Download writes a Blob with the language-appropriate extension; copy uses navigator.clipboard.writeText so the output preserves all whitespace exactly.

    exportclipboardbloblanguage MIMEclient-side
    ok · copiedready · done
    ✓ Copied
    shipped · ready to shipsuccess
Pro tips

Formatting tips that keep diffs sane

Pick one config and pin it

Inconsistent formatting causes diff churn. Commit .prettierrc / .editorconfig and enforce in CI.

Format on save

Editor integration is faster feedback than a pre-commit hook. Use both for belt-and-braces.

Idempotency matters

Running the formatter twice should produce identical output. Test this on a representative file.

Match the language community

Default to community conventions: 2 spaces for JS/CSS, 4 for Python, tabs for Go. Fights over indent are a productivity tax.

Print-width drives wrapping

80, 100, and 120 are the common targets. Wider lines parse fast but review slower side-by-side.

Don&rsquo;t mix formatters and linters

Prettier handles whitespace; ESLint handles correctness. Disable overlapping rules to avoid fight-club configs.

Related toolsJSX FormatterTypeScript FormatterJavaScript FormatterVue SFC FormatterSvelte FormatterSort Imports
Use Cases

When to format TSX

React components, hooks, code review.

Component cleanup

Tidy a long component before opening a PR. Idempotent: running the formatter twice produces byte-identical output, which is the foundation of a clean CI gate. Pair with a pre-commit hook so PRs arrive already formatted, focusing review on logic.

idempotent

Hook tests

Standardise hooks pasted from a test runner. Pairs with EditorConfig + .prettierrc for end-to-end consistency. Whitespace-only changes vanish so reviewers see real diffs, and git blame stays honest about who wrote what.

CI-ready

Code review

Whitespace-only diff noise disappears with canonical form. Output respects your indent width, tab style, and print-width — settings carry over for repeat runs. Switching 2-space to 4-space costs nothing in CPU but standardises an entire codebase.

diff-clean

Docs snippets

Format TSX examples for an API guide. Format-on-save is the fastest feedback loop; CI is the safety net. Together they make inconsistent indentation a thing of the past and free up review cycles for genuine concerns.

PR-friendly

Quick fix

Re-indent a snippet from a tutorial or playground. Whitespace-only changes don't trigger downstream content-hash invalidations, so CDN cache keys and CI cache layers stay warm. Real changes get all the rebuild budget.

review-ready

Cross-project

Match a team's printWidth before submitting. Pairs with linters (ESLint, Stylelint, pylint) that catch what formatting alone can't — bugs, unused imports, dead code. Each tool stays in its lane, and the codebase stays clean.

deterministic
FAQ

Frequently asked questions

No — use Sort Imports for that. Prettier explicitly does not reorder imports.
Prettier doesn't care which library renders the JSX — Solid, Preact, Vue JSX all format identically.
Yes — Prettier's typescript parser handles every TS construct including template literal types.
No. Types and casts are preserved verbatim — only whitespace changes.
No — Prettier runs locally in your browser tab.
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