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Black Forest Labs' Flux.2 line

Run Flux.2 Klein in Your Browser

Klein 9B and 4B, plus the 2,100+ community models built on them. No 9-billion-parameter download, no GPU, no environment to keep alive.

Images generated on Diffus
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The difference, not the spec sheet

Why Run Klein Here

The weights are open. What is not free is the disk, the card and the afternoon of setup.

2,100+ Klein Models, Already Hosted

Community checkpoints and LoRAs built on Klein 9B and 4B are on disk and selectable. Paste a Civitai link to add one that isn't.

Browse models

One Node, the Whole Workflow

Generate, edit, inpaint, outpaint and face swap from a single self-contained Klein node in ComfyUI — no graph to assemble before the first image.

Open ComfyUI

Compare It Against the Rest

Flux.1, Flux Kontext, Qwen, SDXL and SD 3.5 are in the same session. Run one prompt through several and keep what wins.

Start generating

Core capabilities

What You Can Do With It

Generation is the first step, not the whole job.

Prompt to picture

Text to Image on Klein

Prompt Klein 9B for quality or 4B when you want the lighter model, at the aspect ratio you need, with the sampler and guidance already tuned for the Flux.2 line.

Start generating
Selecting a Flux model on Diffus
Edit where you generate

Edit, Inpaint and Outpaint

The Klein node covers editing in the same place you generate — repaint a region, extend the frame, swap a face — without exporting and losing the parameters.

Open ComfyUI
Editing an image on Diffus
Bring your own LoRAs

Stack Community LoRAs

Klein has its own growing LoRA ecosystem on Civitai. Import one by URL and stack it, or fine-tune your own here and use it the moment training ends.

Browse models
A ComfyUI workflow on Diffus

How it works

Three Steps, No Setup

Nothing to download and no hardware to buy.

step 1

Pick Klein

Choose Klein 9B or 4B, or a community fine-tune built on either.

step 2

Write the Prompt

Or bring an image to edit — the same node handles both.

step 3

Generate and Refine

Inpaint, outpaint or upscale in place. Outputs land in your gallery.

Get started
Free creator tools

More Free Tools to Try

Single-purpose tools that need no setup. Describe it, click, done.

Flux 1 Image Generator

Text to image on the Flux.1 line, with community LoRAs.

Try for free

Flux Kontext Image Editor

Prompt-guided edits that keep character and style consistent.

Try for free

AI Image Generator

Text to image with community models, styles and aspect ratios.

Try for free
Explore the library

Models Built on Flux

Checkpoints and LoRAs across the Flux line, ready without a download.

Link from the legend of Zelda BOTW [FLUX DEV] v1.0
A stylized white-haired girl with green eyes wearing a dark green overcoat stands in a snowy village at night with falling snow and illuminated lampposts.
Close-up portrait of a girl with long black hime-cut hair and red eyes drinking blood from a blood bag using a straw, dressed in a white coat and black shirt with a red necktie, set against a dimly lit dark background with soft shadows.
Quaintly Chaotic Comtesse FINAL
AyamiKojima Style v1.0
Anime Art-Style Anime_Retro
A detailed landscape painting forming a face silhouette with a snow-capped mountain ridge, an alpine lake reflecting dawn light on the left, and a shadowed pine forest with a chapel clearing on the right.
Cyberpunk stylized portrait of a bald woman with tribal patterns and big eyes, lit by pink and blue light with glasses and electrical wires attached.
MeMaXL Flat Anime Style - Noob/Illustrious/Pony/XL v4.0 B [Zootlustrious-v2]
Vanillaware Style | Anima/SDXL v2.0 [Zootlustrious-v2]
Chrome Spice v1.0
Cyberpunk(Photographic style) SDXL V.1.0
A person dressed in an ornate metallic steampunk outfit stands on a foggy cobblestone platform holding a detailed gun, with a vintage steam train in the background.
Digital line art illustration featuring a woman reclining on a soft surface, viewed from behind, with flowing long blue hair and silk fabric draping over her legs, surrounded by glowing bokeh lights and orbs on a white background.
ComicSimp v1.0
Vixon's Pony Styles - Kehoe v1.0 Kehoe v1.0
Get inspirations

Made on Diffus

Work from the community, with the model and prompt behind every image.

A hyper-realistic digital painting of a young albino girl with long white hair immersed in water up to her shoulders, surrounded by vibrant red fish swimming in front of her, set against a dark brown checkerboard background.
A pale-skinned girl with long white hair wearing a black corseted dress and a detailed white skeletal futuristic mask against a dark background.
A towering Martian war machine with four legs stands against a swirling twilight sky, painted in post-impressionist style with thick brushstrokes over a village landscape.
Detailed anime-style portrait of a fierce blonde woman in a dynamic crouched pose holding a gleaming katana, set in a golden wheat field under a softly lit sky.
Close-up of a demon girl with glowing cyan hair, heterochromia eyes in pink and blue, wearing a black robe, holding a neon pink sword with dark horns on her head.
A highly detailed futuristic cityscape at sunset with towering skyscrapers, a glowing orange and purple sky, and a reflective metallic river below with a flying vehicle in the air.
High-quality digital painting of a futuristic cityscape at night with towering sci-fi structures illuminated by glowing orange and blue lights, surrounded by lush foliage and multiple glowing moons in the sky.
Highly detailed sci-fi landscape featuring a cybernetic mercenary overlooking a futuristic alien spaceport nestled in a lush jungle canyon beneath a vibrant nebula sky.
A girl with glowing dark wolf ears and an ethereal tail stands in front of a burning village, surrounded by crackling energy and glowing eyes.
A detailed Martian city built along a giant sheer canyon wall with dark mechanical buildings, tall chimneys emitting smoke, narrow interconnected streets, air bridges, under a red sky with a dim setting sun.
A contemporary portrait of a woman holding a blue face mask, with piercing light blue eyes staring above the mask amid splatters of blue paint and a dark background filled with blue masks.
Portrait of a witch with vivid red hair, wearing an ornate black hat with roses, sparkling earrings, black gloves, and detailed black attire.
Pixel art showing a black silhouette with white outlined floating eyes and raised hands in a surreal, abandoned office filled with scattered papers and coffee mugs, with a limited pink-green palette.
Graceful young woman with auburn braided hair adorned with wildflowers stands in a sunlit forest clearing wearing a flowing moss green gown during golden hour.
Portrait of two mature females in streetwear with faces distorted and smeared horizontally, creating a surreal and abstract effect.
Black and white close-up portrait of a woman with long flowing hair swirling around her face, eyes closed, captured in dramatic motion with high contrast lighting.
A visual novel style background of a paved path during golden hour with warm sunset lighting filtering through tall trees, casting dappled shadows on the asphalt, with lush green bushes and a stone wall on the left.
Visual novel style scene of a traditional Japanese street at twilight featuring dark wood machiya buildings, stone-paved street, bicycles, blue noren, and Mount Fuji silhouette in distance.
Visual novel style illustration of a Japanese bakery interior on a rainy day, showing wooden shelves and tables filled with fresh breads and pastries, with a refrigerated display of drinks, and a window with rain outside.
Hyper-realistic digital painting of a slender android girl with metallic details in a futuristic suit standing in front of a large jet engine at an industrial airfield on a clear autumn day.
A delicate teen princess with red hair and translucent pale skin wearing a glowing flower petal corseted dress and silver circlet, painted in a detailed oil portrait style.
Biomechanical female robot made of beige panels covered in expressive black lettering and fragmented words, sitting on the ground with her head resting on knees against a dark background in Letterism style.
Black demon character holding a silver sword, surrounded by blue sparks and copper-colored spheres, set against a pullman brown marbled background with a wetland vista.
Painting of a black and white cat sitting in a grassy field with eyes closed, textured brushstrokes emphasizing soft fur and a calm, serene mood.
A lone figure in a deep red robe stands on rocky cliffs overlooking a futuristic spaceport city illuminated with green, blue, and yellow neon lights under a green night sky with a large glowing moon and a bright spire.
A hooded sorcerer with a skull face stands in a cracked wasteland holding a candle and a staff, under a dark stormy sky with lightning.
A female fantasy warrior in elaborate golden armor with a feathered headdress, riding a peacock-like armored monster with large colorful tail feathers, holding a glowing staff against a dark background.
Waist-high portrait of an ethereal alien figure in minimalist cybergoth fashion with teal and gold colors, intricate zentangle and fog background.
Side profile portrait of a woman with glowing yellow hair against a dark blue background, highlighting dramatic lighting and intricate details.
A lamia girl with long white hair, blue glowing eyes, and pointy ears wearing an elaborately detailed dark kimono surrounded by blue magical flames.
An old man with white beard holding a glowing sword close to his face in a dark, dramatic setting with cinematic lighting and detailed background.
Upper body portrait of an evil queen wearing a black latex dress and a detailed rubber crown, holding a bright yellow rubber ducky with long claw-like fingernails, set against a whimsical, twisted fairytale castle with a vibrant red sky.
A dark rainy night street scene featuring a figure holding a striking red umbrella, with glowing red eyes and a moody atmosphere.
A foreboding queen of snow shrouded in a snowy hooded cloak, standing in a dark, atmospheric snowfall with an eerie presence.
Digital artwork of a shattered golden humanoid figure with glowing eyes surrounded by broken glass shards and lit candles in a dark, eerie atmosphere.
Abstract flat design of bright red blood dripping on a neutral gray background with a minimalist style and smooth liquid shapes.
Watercolor painting of a young woman with dark hair in messy ponytails, wearing a knotted white cotton t-shirt and floral embroidered denim shorts against a vibrant blue sky with white clouds.
Black cat with wide eyes peeking out from under a textured white bedspread in a monochrome photograph
A pale, melancholy 12-year-old girl wearing an orange jumpsuit and backpack stands in a dimly lit, minimalist space station room, looking out of a large window at a distant cityscape under a cloudy sky.

Flux.2 Klein — FAQs

Try Klein Without Downloading It

And put it next to Flux.1, Qwen and SDXL on the same prompt.

Get started

2,100+ Models

No GPU

Product screen shoot