Pretty Code Formatter

A fast online formatter for developers and writers to produce clean, consistent code and text output without manual reformatting.

Tool coming soon!

We're working hard to get this tool ready for you.

Request Feature / Support

1,352+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Pretty Code Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

AI Web Tool Generator

Build Your Own Custom Web Calculator in Seconds

Type what tool or calculator you need below. Our AI will build it instantly for your site.

About This Tool

The Online Pretty Formatter formats code and structured text with language-aware rules. It targets developers, DevOps, and technical writers who need consistent styling before commits, reviews, or publication. It supports multiple languages and formats including JSON, YAML, XML, HTML, CSS, JavaScript/TypeScript, Python, and Java, among others.
Conceptually, the tool tokenizes input, parses it when possible, and rewrites it into a canonical form that adheres to selected style settings. It applies indentation, line length, and punctuation choices without changing semantics. It can preserve comments where supported and avoid altering string literals.
Unique value lies in its combination of language-aware AST-based reformatting, deterministic output, and adjustable presets that align with team conventions. Use cases include standardizing code in a monorepo, preparing documentation blocks, or exporting clean samples for tutorials and reports.
Core features include language selection, indentation control, trailing comma policy, max line length, and a safe fallback mode when parsing fails. Output is a formatted text blob with optional metadata to assist downstream tooling, CI pipelines, and code reviews.

Save your calculation history with a free account

How to Use

Provide inputs: choose target language, indentation, line width, and quoting preferences.
Paste or upload the unformatted content into the input area.
Run the formatter to produce a canonical version.
Review the formatted output and adjust options if needed.
Copy or export the formatted text for integration.

Frequently Asked Questions

Find Quick Answers

What languages are supported?

Supported languages include JSON, YAML, XML, HTML, CSS, JavaScript/TypeScript, Python, Java, and many others. The formatter selects language rules either by explicit language selection or automatic detection, ensuring syntax-aware formatting without altering semantics.

Does it preserve comments and strings?

For languages that support comments, the formatter preserves their positions and associations while reflowing surrounding whitespace. String literals are kept intact, with quotation and escaping normalized according to the chosen options.

Can I use this in CI/CD?

Yes. The formatter can be integrated via a web API or CLI in CI workflows. It produces deterministic output, enabling consistent diffs and review checks, and can emit metadata useful for traceability in pipelines.

What happens on parse failure?

If parsing fails, the tool falls back to a safe line-based reflow, returning readable output along with a failure flag. It avoids changing semantics and signals the issue through structured metadata for downstream tooling.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

Related Tools

Other useful calculators and utilities you might like

Spotify to MP3 Converter

Convert Spotify tracks and playlists to MP3 format instantly with our free online converter.

Road Distance Calculator

Calculate the driving distance and travel time between two addresses with our free online road dista...

Age Calculator

Calculate your exact age in years, months, and days from any birth date to any target date.

Currency Converter

Convert currencies instantly with real-time exchange rates and historical data support.

Your Feedback Matters

Help Us to Improve