Prismtag Editor

Detailed Description

PrismTag is a fast, vibrant, and privacy-first ID3v2.3 MP3 metadata and album art editor that runs 100% inside your browser.

Whether you need to clean up messy track numbers, correct song titles, fix album names, or attach customized cover art, PrismTag handles everything client-side using native JavaScript. Your audio files are never uploaded to any external server or cloud service.

Key Features

• Comprehensive ID3v2.3 Editing: Easily modify Title, Artist, Album, Album Artist, Genre, Year, and Track Number.

• Full Unicode & Thai Script Support: Native UTF-16LE encoding ensures Thai, Japanese, Chinese, and other non-Latin characters display cleanly across all car audio systems, phones, and media players without mojibake or corrupt text.

• Interactive 1:1 Square Album Art Cropper:

  • Upload custom cover art using JPG or PNG files.

  • Drag and pan to frame the exact portion of the image you want.

  • Fine-tune scale with the intuitive zoom slider or mouse wheel.

• Smart Size Reduction & Compression:

  • Export resolution choices: 300×300, 400×400, or 600×600.

  • Optional 1-click Grayscale conversion to sharply reduce embedded byte weight.

  • Strips heavy camera EXIF data and applies optimal JPEG compression to keep audio file bloat to an absolute minimum.

• 100% Private & Permission-Free: Requires zero browser permissions. All tag parsing, image cropping, and file saving take place strictly in local memory.

How to Use

1. Click the PrismTag extension icon in your Chrome toolbar.

2. Select or drag-and-drop your .mp3 file.

3. Edit the metadata text fields as desired.

4. (Optional) Upload an image to crop, zoom, and set as the embedded square cover art.

5. Click Write Tags & Save MP3 to instantly download your updated file.