Quick answer
The Bulk Image Downloader extension preserves original filenames by default when downloading as ZIP. Images land with their source names intact, organized in a single folder.
Website images often have meaningful names: "product-red-angle-45.jpg" or "testimonial-john-smith.jpg". Downloading with a bulk tool risks losing those names and ending up with auto-numbered files. Here is how to preserve filenames and metadata.
Why original filenames matter
- Searchability. "product-red-angle-45.jpg" is findable; "image-1234.jpg" is not.
- Organization. Descriptive names let you sort by content: all "testimonial-" files together.
- Source tracking. Knowing the original filename helps you recall where an image came from.
- Metadata preservation. Descriptive names often encode EXIF or metadata in the filename.
How the extension handles filenames
Bulk Image Downloader uses this logic:
- If the image has a descriptive src filename: Use it (e.g., "hero-product-shot.png").
- If the filename is auto-generated or encrypted: Auto-number sequentially (image-1.jpg, image-2.jpg, etc.).
- Preserve the file extension: Always keep .jpg, .png, .gif, etc.
In most cases, you get the original filename. If an image is served with an encrypted name (like "a7f3x1k2.jpg"), the extension renames to "image-N.jpg".
Folder structure in the ZIP
The downloaded ZIP contains:
- A single root folder (named after the website or page).
- All images in that folder with original or auto-numbered names.
- No subfolders (unless you manually organize after extraction).
After extraction, you can organize by renaming or moving files into subfolders.
Renaming and organizing after download
Best practice after extraction:
- Review all filenames.
- Rename generic files ("image-1.jpg") to something descriptive based on content.
- Create subfolders by category, source, or project.
- Move files into appropriate subfolders.
A few minutes of organization saves hours of searching later.
Advanced: batch renaming tools
For bulk renaming after download, use:
- Windows: PowerShell or free tools like Bulk Rename Utility.
- Mac: A-Zippr or Rename-X.
- Linux:
renameormmvcommand-line tools.
Example: rename all files with pattern "product-" to match a numbering scheme.
At-a-glance comparison
| Tool | Preserves filenames | Folder structure | Metadata kept | Post-download renaming |
|---|---|---|---|---|
| Bulk Image Downloader | Yes | Flat ZIP | Partial | Manual |
| wget/curl | Yes | Yes | Yes | Script-based |
| right-click save | Yes | No | No | Manual |
