PNG Metadata Editor v1.0.0

A graphical tool for viewing and editing metadata in PNG files.

Features

• View all metadata fields (tEXt, zTXt, iTXt chunks) in PNG files
• Add, edit, and delete metadata fields
• Pretty-print JSON-formatted values
• Copy metadata values to clipboard
• Visual indication of unsaved changes

Installation

Prerequisites

• Python 3.6+
• Tkinter (usually included with Python)

Dependencies

Install required packages using pip:

pip install pillow pngmeta

Usage

1. Run the application:

   python png-meta-editor.py
   

2. Open a PNG file using the "Open PNG File" button

3. View metadata in the tree view on the left

4. Select a field to see its full value in the detail pane

5. Use the buttons to add, edit, or delete fields

Building for Distribution

Using build.py (Recommended)

1. First install the required build tools:

   pip install pyinstaller
   

2. Build the application for your platform:

   python build.py
   

3. The resulting executable will be in the dist/ directory

Manual PyInstaller Commands

Windows

pyinstaller --name="PNG Metadata Editor" \
            --windowed \
            --onefile \
            --icon=AppIcon.ico \
            --version-file version.txt \
            png-meta-editor.py

Mac OS

pyinstaller --name="PNG Metadata Editor" \
            --windowed \
            --onefile \
            --icon=AppIcon.icns \
            --version-file version.txt \
            png-meta-editor.py

Linux

pyinstaller --name="PNG Metadata Editor" \
            --windowed \
            --onefile \
            png-meta-editor.py

Required Files

For building, you'll need:

• version.txt (for version information)
• AppIcon.ico (Windows icon)
• AppIcon.icns (Mac icon)
• requirements.txt (for dependencies)

License

This project is licensed under the MIT License - see LICENSE for details.

Author

Robert Tusa robert@tusa.at

Version History

• 1.0.0 (2026-01-05): Initial release