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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.

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
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)
Get inspirations

Made on Diffus

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

Digital painting of a pale gothic young princess with translucent white skin standing inside a dimly lit medieval church, illuminated by soft, warm light from behind.
A dark fantasy digital artwork of a gothic rabbit girl wearing a black dress and a porcelain mask with black rabbit ears, standing in profile with gloved hands clasped against a desolate brown background.
A cyborg child with pastel-colored hair and wide blue eyes reaching out to touch a glowing holographic butterfly against a soft textured background.
A snowman wearing a dark hat and red scarf stands next to a happy chibi cat in winter clothes, drawn in colored gel pens, with sunset snow and sparkling bokeh around.
A celestial temple floating at twilight with glowing blue flora, sky bridges woven with ivy connecting towering crystal monoliths, and a radiant waterfall of liquid starlight.
Aerial view of the Egyptian pyramids with a sapphire river and golden desert sands during golden hour, featuring shadows cast by pyramids and a vivid blue water body.
A detailed and ultra-realistic oil painting of a large blue-green sauropod dinosaur with a ritual garden growing atop its back, tended by tiny saurian monks amid sacred plants and moss, under a pastel sky with floating spores.
A dino-warlock clad in cracked stone armor with vines stands on rocky ground surrounded by shattered monoliths under a blood-red moon, holding a staff topped with a glowing amber skull.
Oil painting of a young vampire noblewoman in Victorian crimson velvet coat and black dress, standing before a gothic castle at twilight with a moody violet sky and full moon.
Close-up of a white woman’s face with vibrant retro disco pop colors and detailed makeup, representing a pop album cover titled 'S.O.S.' by artist MUSAIC.
A mesmerizing spiraling staircase made of ancient and futuristic materials ascends into a surreal, dreamlike dimension with floating islands and a vortex sky.
A high-fashion digital portrait of a confident modern woman with cobalt blue hair and metallic clothing, highlighted by vivid streaks of cobalt blue, magenta, and gold paint in the background.
A black cat wearing a large witch hat with orange eyes stands on grass with yellow and white flowers under a glowing full moon in a whimsical, Tim Burton inspired digital painting style. A smaller black cat with blue eyes sits beside it.
Close-up digital portrait of a young woman with short pink hair and heterochromia eyes wearing a white and gold futuristic helmet on a solid pink background.
A tribal woman with white hair, wolf ears and tail, detailed white body paint, and green eyes sits barefoot on a tree stump at a forest camp smoking a carved traditional pipe, surrounded by tents and smoky forest atmosphere.
Profile portrait of a woman with white hair and textured skin in a dark and mysterious digital illustration style
A cloaked figure stands on a dark, textured dock facing a glowing futuristic city dominated by a massive pyramid under amber and violet skies with neon-lit skyscrapers.
A macro photograph featuring translucent, irregularly shaped structures resembling petrified coral or deep-sea anemones, interwoven with fibrous roots and dark glossy obsidian fragments, illuminated by cool ambient and warm internal light within a misty, shadowy background.
Dark skeletal equine-dragon hybrid rearing with tattered bat-like wings, rendered in charcoal and deep umber on a sketchbook page with loose graphite drawings.
Close-up photorealistic portrait of a mature Bene Gesserit woman with intense gaze, stoic expression, partially obscured by dark grey-black fabric with metallic threading, lit with dramatic chiaroscuro lighting.
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

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