XML Viewer Formatter

A fast XML viewer and formatter for developers, data engineers, and IT pros to inspect, format, and validate XML quickly.

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1,228+
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 XML Viewer 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

This tool provides a focused XML viewer and formatter designed for developers, data engineers, QA, and IT operators. It accepts raw XML text or pasted content, returns a structured, readable view, and offers a formatted output ideal for code reviews and data inspection. It supports well-formedness checks, optional schema validation, and formatting options such as indentation control and a compact single-line mode. The result is suitable for API debugging, data integration, and configuration validation.
How it works conceptually: the in-browser parser builds a tree or stream, checks well-formedness, applies deterministic formatting rules, and emits the formatted XML along with precise error positions when issues exist. If a schema is supplied, basic type and structure validation runs to catch mismatches. The tool emphasizes stateless processing and immediate results for rapid iteration.
Who benefits: developers, data engineers, QA testers, and operations teams who need reliable, fast XML formatting and validation without external dependencies. Unique value: client-side processing with deterministic formatting, optional XSD validation, clear error reporting, and support for large documents via streaming where possible. Core features include validation, pretty indentation, node collapsing options, line/column error reporting, and output export. Typical use cases span API payload debugging, log normalization, configuration file validation, and data preparation for pipelines.

How to Use

  1. Provide inputs: paste or upload XML text into the input area.
  2. Optionally attach an XSD and adjust indentation or compact mode.
  3. Run processing to format and validate; results appear as formatted XML and error list.
  4. Review outputs: copy, download, or pipe formatted XML into your workflow.
  5. Iterate with different schemas or options for targeted validation and readability.
How to use online xml viewer formatter

Frequently Asked Questions

Find Quick Answers

What formats are supported?
The tool accepts XML text only. It focuses on well-formedness, formatting and optional validation against a provided XSD, returning a formatted copy and structured error messages when parsing fails.
Can it validate XML against an XSD?
Yes. If an XSD is supplied, the tool performs basic schema validation to catch element and attribute mismatches, while preserving the original input for reference and debugging with line/column locations.
How does it handle large XML documents?
The parser supports streaming and incremental processing where possible, enabling processing of larger documents. Memory usage depends on document size and browser capabilities; very large files may require chunked usage.
Is my data stored after processing?
No data is sent to a server by default. Processing is designed for client-side use in the browser, and outputs are provided to copy or export without retention by the tool.

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