Formatters
JSX Formatter
Paste JSX on the left, hit Run, copy stable indent so diffs stay small and reviews stay kind. No Node, no pip, no Docker for a five-minute job. That is the jsx formatter.
Drop a file on the left. Drafts stay in this browser. Shortcut: Ctrl or Cmd + Enter to run.
How this jsx formatter works
- Paste or drop a .jsx file into the input on the left.
- Flip options if you see them (comments, indent, case). Defaults are the safe ones.
- Hit Run, or Ctrl / Cmd + Enter. Leave “Process on server” off unless you mean it.
- Read the status line, then copy, download, or jump to a related tool.
What this jsx formatter is for
The file is already in front of you. You need to format it without opening a whole IDE profile. Paste, run, copy. Typical timing: every time a payload or query has to be read by a human — APIs, SQL, YAML, HTML emails.
You walk away with stable indent so diffs stay small and reviews stay kind.
What it will not pretend to be
This is not a linter. Format can hide problems that a validator would still catch. JSX tidy here is markup-leaning. For production React/Prettier configs, keep the repo formatter as source of truth.
By default nothing leaves the tab. Tick “Process on server” only if you want to compare results or use gzip numbers that match the server library.
A practical way to use it
Drop a .jsx file onto the input or paste. Flip options if they are there. Run. Read the status line. Copy or download. Drafts stay on this device so a refresh does not punish you.
When you are done, hop a related tool instead of starting over: minify and beautify toss the file back and forth, format and validate often share a parser, convert wants valid input first.
The small print that saves a round-trip
JSX tidy here is markup-leaning. For production React/Prettier configs, keep the repo formatter as source of truth.
You searched “jsx formatter online.” You got an editor, not a login wall. That is the deal.
Frequently asked questions
What does formatting JSX actually do to the file?
Formatting JSX is about a stable shape: indent, wrapping, keyword casing where it helps. Example: return (<Card title={t} />) reads easier as return (\n <Card title={t} />\n). It is not a linter and not a compiler.
Should I format JSX before I go live, or while I edit?
Edit in a readable shape. formatting belongs to the moment the file has to be understood (beautify/format/validate) or the moment it leaves your hands (minify/encode). Mixing those moods is how minified HTML becomes your only source of truth — a sad place to live.
Can formatting JSX break what I already put live?
JSX tidy here is markup-leaning. For production React/Prettier configs, keep the repo formatter as source of truth. Glance at the output once. A 20-second read beats a 20-minute “why did production go weird” thread.
Got a simple before-and-after for jsx formatter?
Sure. Before: return (<Card title={t} />) After: return (\n <Card title={t} />\n). That is the whole mood of the tool — same job, different clothing. If your real file is huge, try a representative slice first so you can see the rule, not a wall of text.
What about comments, strings, and data that look like code?
Strings are data. 'a + b' is not math. Comments are notes — minify may drop them, beautify should keep them if the engine sees them. JSX has its own trap: JSX tidy here is markup-leaning. For production React/Prettier configs, keep the repo formatter as source of truth.
Any fun JSX fact worth remembering?
Fun fact: <div /> and <div></div> are not always equal in HTML, but in JSX both become an element with no children. Beautify is about reading the tree, not changing React’s mind.
Do I still need a bundler, Prettier, or a schema tool?
For an app in git: yes — keep the project formatter and the bundler. This jsx formatter is for the five-minute paste: a log line, a vendor dump, an email template, an API body. Different altitude, same mountain.
When should I not use a jsx formatter?
Skip it when the file is a binary, when you need a full language compiler, or when a single sample cannot represent the format (Excel workbooks, YAML with anchors, HTML that is really a React tree). Also skip minify as your only copy of source. Keep a readable original.