Add Line Numbers for Config Files

About This Tool

Configuration files are at the heart of modern software development — from package.json and tsconfig.json to VS Code settings and cloud infrastructure templates. This Add Line Numbers for Config Files is tailored for processing ADD configuration files with the precision and care they require. Configuration files often contain comments (in formats that support them), version-specific settings, and carefully structured hierarchies that must be preserved during formatting. The tool processes these files while maintaining all data integrity, ensuring that indentation reveals the logical structure of configuration sections, nested settings, and conditional values. Whether you are cleaning up auto-generated configuration, merging settings from multiple sources, or preparing config files for documentation, this tool handles the task reliably.

What is Add Line Numbers?

An add line numbers tool prepends sequential numbers to each line of text, creating a numbered reference that makes it easy to identify and discuss specific lines in documentation, code snippets, log files, and data exports. Line numbers are essential for debugging — error messages typically reference line numbers, and having numbered text makes it trivial to locate the exact line. For documentation and technical communication, numbered lines enable precise cross-references like 'see line 42' without ambiguity. The tool automatically pads numbers to consistent width (e.g., ' 1', ' 2', ..., '10') ensuring alignment in monospaced environments.

How to Use This Tool

1. Paste your text.
2. Click Add Line Numbers.
3. View the numbered output with padded numbers.
4. Copy and use in documentation or debugging.

Common Use Cases

• Formatting package.json for readability
• Cleaning up tsconfig.json and eslint configs
• Processing VS Code settings.json files
• Normalizing docker compose JSON overrides

Examples

First line
Second line
Third line

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