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All in one GUI tool for LoRA preprocessing and captioning, simple and tiny

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MA

marycheung021213211

Sep 6, 2025

(Updated: 5 months ago)

tool guide
toolpreprocesstraining
All in one GUI tool for LoRA preprocessing and captioning, simple and tiny

LoRA Preprocess Master

LoRA Preprocess Master is a simple and tiny GUI tool for one-click preprocessing and automatic captioning of LoRA model datasets. It uses very light weighted captioning models moondream and BLIP, which can easily run on your local machine.

Features

  • Batch Image Preprocessing

    • Batch resize images to common LoRA training sizes (512 for SD1.5, 1024 for SDXL, or custom).

    • Option to crop to square.

    • Output format conversion (JPEG / PNG).

  • Automatic Image Captioning

    • Two integrated models:

      • BLIP - CPU-friendly option

      • Moondream - Requires CUDA and GPU (~5GB VRAM)

    • Batch adding of trigger words

    • Cache directory support for efficiency

  • One-click Workflow

    • Simply set input and output folders, enable the features you want, and click Start.

The goal is simple: fully local, super lightweight, and absolutely minimal. Give it a try and let me know how it runs, or if you think I should add more features.

Github link: https://github.com/jiaqi404/LoRA-Preprocess-Master

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