#119 · Programming Language Developer Tool

TypeScript Viewer

View TypeScript with optional formatting, declaration outlines, line numbering, and statistics for interfaces, types, enums, generics, unions, readonly, optional, and exported symbols.

Developer Input

Browser-based source processing

Source code or structured input

export interface User<T> {
  readonly id: number;
  data?: T;
}

Mode

Indent size

spaces

Show line numbers Highlight type keywords Preserve comments Auto-run while typing

How to use this developer tool

Paste or upload TypeScript.
Choose Pretty, Raw, or Outline view.
Select display options.
Run the viewer and navigate the generated output.

What this developer tool does

The viewer presents TypeScript as safe text, highlights TypeScript-specific declarations, and summarizes type structures without running or compiling the source.

Lexical scan → optional formatting → declaration outline → TypeScript-specific counts → copy-ready rendering.

Hide or highlight features affect only the display and never alter the original input.

Example

Input:

export interface User<T> {
  readonly id: number;
  data?: T;
}

Expected use: Run the selected mode and review the generated output and statistics.

Tips for better output

Use Outline view for large declaration files.
Raw view preserves the exact source.
Special type counts are statistical, not compiler diagnostics.
No TypeScript is executed.

FAQ

How can I view TypeScript code with line numbers?

Enable Show line numbers and run the viewer.

How do I highlight TypeScript interfaces online?

Enable Highlight type keywords to emphasize interface, type, enum, and generic declarations.

How can I browse TypeScript declarations quickly?

Choose Outline view to list declarations with their source lines.

How do I find exported symbols in TypeScript?

The structure summary counts and lists exported declarations.

How can I view TypeScript types without running the code?

The viewer treats the source strictly as text and never executes it.

Related developer tools

TypeScript Checker TypeScript Generator TypeScript Formatter TypeScript Converter

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

Browse more developer tools

Calldeveloper category hub

Browse Programming Language Tools