JAR Editor Online Pro

JAR Editor Online is a web-based tool that lets you view, edit, and manage JAR files directly in your browser. Available at https://jar-viewer.fly.dev/, it offers a modern, secure approach to working with Java archives without requiring any installation.

Core Features

Easy File Handling

• Simple drag-and-drop upload

• Quick file selection via button

• Supports .jar files with validation

Advanced File Browser

• Clear hierarchical file tree navigation

• Expandable/collapsible directories

• Color-coded file indicators

• Resizable browser panel

• Special handling for class files

Powerful File Management

• View and edit text files with syntax highlighting

• Binary file detection with hex dump view

• Class file preview with readable string content

• Download individual files

• Revert files to original state

Smart Search Capabilities

• Search across all files in the JAR

• Binary file search support

• Quick navigation to search results

• Automatic folder expansion for matches

• Filtered file tree view for matches

Professional Editing Features

• Full text editing for non-binary files

• Syntax-appropriate display

• Save changes to JAR in memory

• Discard or revert changes as needed

• Clear editing indicators

Security-First Approach

• Browser-based processing (no server uploads)

• Clear security disclaimers

• Risk acknowledgment system

• Non-destructive workflow

• Original file preservation

Perfect for developers who need to

• Inspect JAR contents quickly

• Make quick text file modifications

• Search through archive contents

• Manage individual files within JARs

• Work with class files safely

All processing happens in your browser - no installation needed, no server uploads required. Start working with your JAR files more efficiently today.