Code Beautifier

Code Beautifier Tool Guide

What you will get (overview)

• Format common languages instantly: based on mature rules (e.g. Prettier) to normalize whitespace and line breaks.
• Team-friendly options: indent type/size, print width, and predictable output.
• Cleaner diffs: reduce formatting-only noise and improve code review.
• Privacy boundary: client-side formatting, but code may be sensitive—redact before sharing.

Typical use cases (engineering-oriented)

• Before commits: reduce “indent-only” diffs.
• Docs and examples: make snippets easier to read in PRs and documentation.
• Legacy/third-party code: quickly normalize inconsistent style.

Quick glossary

• [Prettier] A widely used formatter producing stable and predictable output.
• [Indentation] Visual hierarchy via spaces/tabs.
• [Print width] Preferred maximum line length for wrapping.
• [AST] Abstract Syntax Tree; formatters often parse code into an AST before printing.

Best practices

• Match your repo config: align settings with your project’s .prettierrc.
• Be careful with mixed syntaxes: templates or unusual language mixes may need manual review.
• Keep the official workflow in-repo: use this tool for quick fixes; keep CI/lint as the source of truth.
• Redact sensitive code: avoid pasting secrets or internal logic into public contexts.

Related tools

• OnesAPK Code to Image Export formatted snippets as shareable images
• OnesAPK JSON Formatter Specialized formatting/validation for JSON

Boundary & redaction note

This tool is for code formatting only and does not guarantee compliance with all team policies. Avoid pasting secrets, tokens, internal domains, or unreleased business logic; redact and ensure authorization before sharing.

1. What this code beautifier can do

• One‑click code formatting
  Supports common languages such as JavaScript, TypeScript, HTML, CSS, JSON, Markdown, and YAML, turning messy code into consistently formatted output.

• Custom indentation style
  Choose between spaces and tabs, and configure the indentation size (2 / 4 / 8) to match your team’s coding standard.

• Control maximum line width
  Pick a print width (80 / 100 / 120 / 140 / 160) or disable it entirely, depending on your editor and code review preferences.

• Preserve logic, unify style
  Formatting only changes indentation, line breaks, and whitespace, without altering program logic, making it safe to run before commits.

• Client‑side processing for privacy
  The OnesAPK Code Beautifier runs entirely in your browser. Your code is not uploaded to any server, so it’s suitable even for private repositories.

2. Basic usage

1. Paste or type your code into the Input code area:

   • Multi‑line snippets are supported;
   • For best results, include complete statements or blocks.

2. Configure the options above the editor:

   • Language – select the language that matches your code;
   • Indent type (space / tab) – follow your team’s convention;
   • Indent size (2 / 4 / 8) – number of spaces per indentation level;
   • Print width – controls when long lines wrap; choose “no limit” if you prefer no enforced wrapping.

3. Click Format:

   • The tool uses a built‑in Prettier engine to format the code;
   • The read‑only result panel shows the formatted code with syntax highlighting and line numbers.

4. Copy the result:

   • Click Copy to copy the formatted code to your clipboard;
   • The button briefly shows a “Copied” state on success.

5. Clear and start over:

   • Click Clear to reset both the input and result, as well as any error messages.

3. Use cases and advantages

3.1 Typical use cases

• Normalize code before committing
  Run the formatter before git commits to reduce noise from inconsistent spacing and line breaks in diffs.

• Clean up examples for reviews and documentation
  Format code before including it in PR descriptions, design docs, or blog posts so readers can focus on content rather than layout.

• Tidy up legacy or third‑party snippets
  Apply consistent indentation and wrapping to imported or old code, making it easier to maintain.

3.2 Why this tool is helpful

• Built on Prettier’s mature and predictable formatting rules;
• Supports multiple languages and configuration combinations for common frontend and scripting scenarios;
• Runs in the browser, no need to install editor plugins or CLI tools;
• Displays results in a proper code editor with line numbers and syntax highlighting.

4. Common issues and troubleshooting

4.1 Formatting fails or shows an error

• Syntax errors in the code

  • Prettier will throw an error if the input contains invalid syntax;
  • Check for missing brackets, quotes, commas, or other common mistakes.

• Mismatched language selection

  • For example, treating JSON as JavaScript may cause parse errors;
  • Make sure the Language option matches your actual code type.

• Extreme line width or indentation settings
  While not errors, very small or very large settings may lead to awkward wrapping. Try adjusting the print width if the result looks cramped or too spread out.

4.2 Why does the result differ from my local IDE?

• Your editor may use different formatting rules or plugins than the built‑in Prettier configuration used here;
• If your team has a shared .prettierrc file, try aligning the indent and print‑width options in this tool with that configuration.

5. Tips for effective use

• Test formatting on a small snippet first
  When style requirements are strict, format a small sample first. Once you’re happy with the result, format the entire file.

• Use diff tools to inspect changes
  After formatting in this tool, paste the result back into your editor and use git diff to confirm only cosmetic changes were made.

• Bookmark it as an “online code beautifier”
  You can quickly find this tool with search queries like “code beautifier online”, “online code formatter”, or “Prettier online”, and add it to your bookmarks for everyday cleanup before commits.

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Summary:
This online Code Beautifier is ideal for unifying code style before commits, preparing clean examples for documentation, and tidying up third‑party snippets. All formatting happens locally in your browser, giving you a quick, safe way to keep your codebase consistent.