Online ASPX Formatter

A precise, code-focused ASPX formatter that standardizes indentation and attributes for ASPX/ASP.NET markup, targeting developers, code reviewers, and QA teams.

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Request Feature / Support

1,200+

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 Online ASPX 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

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About This Tool

The ASPX formatter standardizes indentation and attribute formatting for ASPX/ASP.NET markup. It accepts a code snippet and applies consistent spacing, tag wrapping, and quote normalization to produce readable, maintainable code.
Conceptually, the tool tokenizes the input, analyzes structural nodes (tags, attributes, and server-side blocks), then reconstructs the document with a fixed indentation grid (default 4 spaces). It avoids semantic changes and preserves comments and inline server scripts.
Audience and value: developers, build engineers, QA analysts, and code reviewers gain faster reviews and more predictable diffs. Unique differentiators include configurable indent_size, optional line wrapping of attributes, and robust handling of ASPX server controls in mixed HTML markup.

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How to Use

Step 1: Provide inputs: paste the ASPX/ASPX.NET code snippet to format. Step 2: Configure options: set indent_size (2–
, max_line_length, wrap_attributes, preserve_newlines, encoding. Step 3: Submit: run formatting to generate the formatted_code output. Step 4: Review outputs: inspect formatted_code and any diagnostics. Step 5: Export or copy: save the formatted snippet to your repository or clipboard.

Frequently Asked Questions

Find Quick Answers

What is this formatter for?

It formats ASPX/ASPX.NET markup to a consistent style, improving readability and diffs for developers, reviewers, and QA teams. It does not execute code or alter server-side logic.

Can I customize indentation and wrapping?

Yes. Indent sizes range from 2 to 8 spaces; you can enable or disable attribute wrapping and preserve existing line breaks. Rules apply uniformly across the document to ensure consistency.

Does it preserve comments and server-side blocks?

Yes. All comments and server-side blocks are preserved in place. Formatting changes whitespace and attributes only, without altering semantics or scripting.

What if the input is very large?

Large inputs are processed in chunks to avoid memory issues. If limits are exceeded, a diagnostic is returned with guidance, and partial formatting may be provided where feasible.

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