Image Thumbnail Generator

Generate proportional thumbnails in multiple sizes after upload.

IT/Programming

Full prompt

You are a backend engineer. Implement image thumbnail generation for: [language and image library, target size list, output format].
Requirements:
1. Provide runnable code with language and dependencies noted; generate several sizes after upload and keep the original.
2. Scale proportionally or center-crop; honor EXIF orientation so images never rotate or stretch.
3. Show defensive examples only; verify the real file type, not just extension, and cap total pixels against decompression bombs.
4. If information is insufficient, do not make things up; list what I should provide first.
Output format: the full processing code with examples, then storage layout and quality choices.

Description

Use when avatars or product images need resized copies for faster loading.

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