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SimpleTuner

SimpleTuner is a multi-modal diffusion model fine-tuning toolkit focused on simplicity and ease of understanding.

  • Get Started

    Install SimpleTuner and train your first model in minutes

    Installation

  • Web UI

    Configure and run training through a sleek web interface

    Web UI Tutorial

  • CaptionFlow

    Generate dataset captions with local GPU workers

    CaptionFlow Captioning

  • NSFW Checks

    Filter VAE cache samples with local classifier policies

    NSFW Classifier Checks

  • REST API

    Automate training workflows with the HTTP API

    API Tutorial

  • Cloud Training

    Run training on Replicate or distributed workers

    Cloud Training

  • Multi-User

    Enterprise features: SSO, quotas, RBAC, worker orchestration

    Enterprise Guide

  • Model Guides

    Step-by-step guides for Flux, SD3, SDXL, video models, and more

    Model Guides

  • Experimental Methods

    Research features such as AnyFlow, Self-Flow, Flow-DPO, LayerSync, Diff2Flow, and Video CREPA

    AnyFlow

Features

  • Multi-modal training - Image, video, and audio generation models
  • Web UI & API - Train via browser or automate with REST
  • CaptionFlow captioning - Generate captions with local GPUs through the Web UI job queue
  • Worker orchestration - Distribute jobs across GPU machines
  • Enterprise-ready - LDAP/OIDC SSO, RBAC, quotas, audit logging
  • Cloud integration - Replicate, self-hosted workers
  • Memory optimization - DeepSpeed, FSDP2, quantization

Supported Models

Type Models
Image Flux.½, SD3, SDXL, Chroma, Auraflow, PixArt, Sana, Lumina2, HiDream, and more
Video Wan, LTX Video, Hunyuan Video, Kandinsky 5, LongCat
Audio ACE-Step

See Model Guides for complete documentation.

Community

License

SimpleTuner is open source software.