How to use this developer tool
- Paste JavaScript or upload a supported file.
- Choose Pretty view or Raw view.
- Select the display options and indent size.
- Run the viewer, then copy or download the result.
#111 · JavaScript Developer Tool
JavaScript Viewer
View and explore JavaScript code with safe formatting, line-aware statistics, search-friendly output, and structural summaries directly in your browser. No code is executed or uploaded.
Developer Input
Browser-based source processingspaces
Ad space
What this developer tool does
The viewer safely normalizes or preserves JavaScript source and reports functions, classes, imports, exports, comments, and line metrics without executing the code.
Protected lexical scanning → optional pretty formatting → structural counting → copy-ready output.
Formatting is intentionally conservative around strings, comments, template literals, and regular expressions.
Example
Input:
const add=(a,b)=>a+b; console.log(add(2,3));Expected use: Run the selected mode and review the generated output and statistics.
Tips for better output
- Use Raw view when exact whitespace matters.
- Pretty view is intended for reading, not compilation.
- Large minified files may be easier to inspect after formatting.
- No JavaScript is executed by this page.
FAQ
How can I view minified JavaScript code online?
Paste the minified source, select Pretty view, and run the viewer to add readable indentation and line breaks.
How do I add line numbers to JavaScript code?
Enable Show line numbers before running the viewer. The output is rendered with numbered lines.
How can I search inside a large JavaScript file?
Use the browser find command on the copy-ready output or inspect the generated structure summary.
How do I view JavaScript without executing it?
This tool treats the source as text and never evaluates or runs the JavaScript.
How can I inspect JavaScript functions and classes online?
Run the viewer to receive function, class, import, and export counts alongside the formatted source.
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Supported analysis and output
| Module | Purpose |
|---|---|
| Input | Local browser processing |
| Analysis | Tool-specific lexical and structural logic |
| Output | Copy and download ready |
| Privacy | No upload or server execution |