JavaScript Viewer: Read and Explore JavaScript Code
JavaScript Viewer displays pasted or dropped JavaScript in a read-only, syntax-highlighted view with line numbers. Use the clickable outline to navigate functions and classes, then review statistics for lines, bytes, function count, and approximate minified size. It accepts JavaScript content and lets you copy useful excerpts; processing stays in your browser, so your code is not sent to a server.
JavaScript Viewer is a browser-based tool for reading and exploring JavaScript source. Paste code or drop a .js file to see a read-only view with syntax highlighting and line numbers. The JavaScript Viewer helps developers scan code and find important sections without opening a separate editor.
The viewer presents the input as a parsed view and includes a clickable outline of functions and classes. Select an item in the outline to navigate through the code. You can also review statistics for lines, bytes, function count, and approximate minified size, then copy an excerpt you need.
JavaScript is a programming language, and .js files contain JavaScript source code. This tool displays that source rather than converting it into another format or editing it. The syntax-highlighted view and outline can make an unfamiliar file easier to explore, while the statistics provide a concise overview of its size and structure.
JavaScript Viewer is free and runs entirely in your browser. Your input is processed on your own device; it is not uploaded, stored, or sent to a server. Once the page has loaded, the tool works offline without a server connection.
The viewer is useful for developers and DevOps engineers who need to inspect JavaScript, navigate functions and classes, check code statistics, or copy a useful excerpt. Its read-only presentation makes it suitable for quick code review when you want to examine a file without changing it.
Step 1: Paste your JavaScript or drop a .js file into the viewer. The tool displays the input as a read-only view.
Step 2: Inspect the syntax-highlighted code and line numbers. These make the source easier to scan and locate.
Step 3: Use the clickable outline to jump to functions and classes. It provides a quick way to explore the code structure.
Step 4: Review the code statistics for line and byte counts, function count, and approximate minified size.
Step 5: Copy the excerpt you need from the displayed JavaScript.
Use case: Inspect JavaScript written by someone else when the source is difficult to scan. Syntax highlighting, line numbers, and the code outline help you explore it.
Use case: Check the structure of a JavaScript file before writing code that consumes its values. The viewer lets you review the source without editing it.
Use case: Find a function or class in a longer file. Use the clickable outline to navigate directly to those code elements.
Use case: Review basic size and structure statistics for a JavaScript file. Line, byte, and function counts provide a quick overview.
Use case: Check the approximate minified size of JavaScript while reviewing a file. The statistic gives you a quick reference without changing the source.
Use case: Copy a clean excerpt from a large JavaScript document for use in notes, a review, or another development task.