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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.

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
A girl rowing a small boat in a stormy sea with large waves and a swirling bright sky above, anime style
Cross Belt Blindfold | Illustrious Illustrious 2.0
A mystical forest guardian wearing ethereal white robes stands barefoot in a dark forest, her glowing blue antlers adorned with moss and vines, with shimmering eyes and cinematic lighting.
Eldritch Fantasy for Flux v1.2
Rhea/レア (Fire Emblem: Three Houses) SDXL LoRA | 5 Outfits [Illustrious] v1 (Illustrious)
zhongfenghuaStyle_FLUX_ Lora | 厚涂笔触_FLUX版_ Lora v1.0
Get inspirations

Made on Diffus

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

A hand-drawn sketch of a boy and girl ice skating hand-in-hand on a city rink at night with colorful Christmas lights and falling snow surrounding them.
A dark fantasy anime-style digital painting featuring a skeletal queen with glowing blue eyes, adorned with intricate golden honeycomb armor and robotic wings, set against a blurred forest background.
Snow-covered plum blossom tree with bright red flowers standing on a cliff under a gray sky, rendered in Yoshitaka Amano style with dramatic chiaroscuro lighting.
A cute chibi snowfox with a blue-tinted tail walking through a snowy forest, leaving behind a trail of multicolored glowing paw prints under soft natural light with sparkling snowflakes.
Grotesque witch smeller figure with a pointed hat and decayed skin, overlooking a sunset city skyline with dramatic orange and red clouds.
Close-up impasto painting of a sea turtle with detailed shell texture, resting on a golden sand beach with vibrant turquoise water and sunlight reflecting off the wet sand.
A black and white surreal fashion portrait of a young woman standing in an impossible urban corridor with mirrored glass and striped geometric patterns inspired by M.C. Escher architecture.
A punk woman leaning against a wall in a dark shadowy room with a misty gray background, depicted in a moody Limbo style silhouette.
Full body mature opera diva in dark, metallic-accented layered gown walking under a large ruined glass bridge with a turquoise sky and a distant wizard's tower.
A wererabbit girl with white fur, rabbit ears, antlers adorned with a pink flower crown, dressed in a maid outfit, reading a book in a forest with sunlight filtering through trees and white rabbits nearby.
A female futuristic warrior wearing a yellow textured bodysuit, standing between two white robotic humanoid figures in a minimalistic setting.
Black and white illustration of a woman with a red turban and patterned jacket, smoking a cigarette against a yellow background
Realistic digital portrait of a young red-haired woman with freckles, wavy hair, wearing a vintage outfit, softly lit against a dark background in Da Vinci style.
CGI-rendered anthropomorphic duck with black plumage and large orange beak, styled in Rembrandt-inspired Baroque chiaroscuro lighting on a brown gradient background.
Surreal landscape featuring a large black-and-white inverted triangle in the sky depicting trees and buildings by a reflective lake, set against a peaceful sunset with soft natural colors over a shoreline with flowers and plants.
A stylized illustration of a girl with dark auburn twin braids wearing a flowing white dress standing on a light-colored staircase with flowers below and a dark background.
A young woman with short blonde hair sits gently amidst a field of yellow and orange wildflowers, wearing a light flowing white dress, blending softly with the nature around her.
A photorealistic anthropomorphic bird with white feathers and green stripes on its chest, bathed in golden sunlight in a lush forest with red leaves.
A lone synthetic soldier stands in a corridor under saturated red light, reflected in a shallow pool. Behind is a large fragmented celestial Noh mask face with glitch and kanji symbols.
A bride standing alone inside a dark church illuminated by a bright white veil and a faint heart-shaped light above her
A white animated candle character with expressive eyes furiously running away from a burning matchstick held by a large human hand, with wax dripping and motion lines emphasizing urgency.
Double exposure of hooded figure silhouette blending with a forested landscape featuring a winding river and cascading waterfalls illuminated by golden sunlight.
Young woman taking a playful mirror selfie in a colorful purikura arcade booth surrounded by neon lights, kawaii stickers, and digital heart overlays.
A watercolor art portrait of a red-haired person wearing traditional ancient Asian clothing, sitting outdoors beside a wooden building with sunlight illuminating the scene and mist particles in the air.
A colossal, ethereal being with shimmering purple scales and glowing eyes towering in an ancient forest under twilight skies, facing a lone traveler.
A large crystal-clear ice cube on a shallow pool of water reflecting a vibrant sunset, surrounded by smooth stones and distant silhouetted figures in a tranquil landscape.
A large mechanical elk covered with vines stands on a snowy cliffside near an abandoned elf temple, with monks meditating nearby and birds on its antlers.
Mechanical clockwork dragon towering over golden meadows where dwarven farmers herd giant mechanized beetles equipped with seed-firing cannons, under a misty sky.
A cyberpunk warrior sits with a commanding pose, featuring robotic gold arms, dreadlocked hair, and a mechanical sword, dressed in a steampunk brown outfit with a bowtie.
A serene woman with platinum hair wearing a gothic-cyberpunk headdress of iridescent feathers and neural circuitry, holding a glowing crystal heart, illuminated by bioluminescent light against a dark background.
Silhouette of a lone traveler standing barefoot on a rocky hillside at sunset with a glowing cityscape and dramatic clouds in the background.
A tall red haired woman wearing a neon asymmetrical dress in bright pink, yellow, and orange walks powerfully through a dystopian urban wasteland with glowing neon signs and vivid colors.
Photo-realistic portrait of a woman with vibrant orange hair styled in double buns and long braids, striking blue eyes, floral face paint, and an ornate black and gold outfit.
A peaceful sleeping woman with multicolored flowing hair lies on a blue couch in a softly lit room with sunlight streaming through a window, painted in a watercolor style.
Anime-style surreal portrait of a young person with short dark hair, their face obscured by a chaotic collage of colorful Polaroid photographs against a soft muted blue background.
A girl in a school uniform holding a red oil-paper umbrella stands on a snowy Japanese street at night, with cinematic lighting and softly falling snow.
Digital painting featuring two standing human figures on the left and a walking cat on the right, rendered with watercolor and ink splatter effects in shades of blue with abstract water splash elements.
Close-up of a nurse with a face half human and half rust, wearing a rusted nurse cap and uniform, standing in a dark room with a bright door behind.
A dark oil painting of a pale gothic princess standing inside a medieval church, bathed in glowing moonlight, done in the styles of Shaun Tan and Rembrandt.
Oil painting of a tall red and blue Japanese pagoda surrounded by autumn trees beside a tranquil river with a red wooden bridge, mountain backdrop in ukiyo-e style.

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