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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.

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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.

Lovecraftian Nightmare Landscapes Flux
STYLES | PONY & ANIMAGINE RMS v0.1 (Pony V6 XL)
A detailed digital illustration of a female angel with black and red hair, red eyes, white feathered wings, a cracked floating halo, wearing a black vest, white shirt, and red tie, featuring visible tattoos and scars on her arms.
Temogam Art Style v2.0
[Pony] Geekpower Artists Style Optionaltypo
Terrifying Clown (FLUX) flux v1
Nani Pelekai (Lilo & Stitch) - Lora Illustrious Illustrious
Akabur Style PDXL, Illustrious Akabur V2.5
Frank Flux-etta V1
A surreal abstract portrait of a young woman with platinum blonde hair and pale skin, her face partially obscured by bold, colorful horizontal brushstrokes in yellow, blue, red, green, and white against a dark background.
biostuff experiments - mushroom house v0.1 mossystuff
Shrekman Style MIX v1.1pony
Woman in a pink summer dress with lace trim, wearing a straw hat and large hoop earrings, with chestnut hair and olive skin, leaning against a textured wall.
See through blouse - no bra V0.1
Cherry-Gig Style for PonyXL v1.0
MorgyMix-illustriousXL v4.1-Painterly-AAAAAAAAAA
Makima (Chainsaw Man) Flux LoRA v2.0
Get inspirations

Made on Diffus

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

Silhouetted English Gothic church behind a bare tree with a bicycle nearby, all reflected in a puddle, captured in soft sepia tones with a textured beige background.
A futuristic, sleek high-tech luxury yacht with curved windows and a circular pool, cruising through calm coastal waters surrounded by mountainous landscape and smaller boats.
Highly detailed CGI of a futuristic spherical space station with white modular structures and dramatic lighting, set in a snowy mountainous landscape.
Majestic frozen castle with towering spires covered in ice, set in a vast icy landscape with snow-covered terrain and jagged ice formations under a cold blue sky.
A faceless goddess with a smooth, starry black head and dark, ornate armor with white fur collar, holding her hand raised against a vibrant pink and magenta cosmic background.
A slender elven mage with long black hair and glowing violet eyes stands in a ruined stone castle under a stormy night sky, casting swirling purple magical energies from his gloved hands.
A sinister figure with glowing orange eyes wears a black top hat with a red band and a flowing red coat, set against a solid red background.
Close-up portrait of a female elven warrior with silver and black flowing hair, wearing intricately detailed silver armor adorned with gold accents and emerald gems, staring thoughtfully with piercing green eyes.
Black and white portrait of a young woman dressed as a dark clown cat, with platinum blonde hair, bold clown makeup, black leather cat ears, studded choker, and claw-like black leather glove.
Highly detailed engraving illustration of a demented and evil old pope looking upwards from a high angle, set against a black background in a gothic horror style.
Close-up portrait of a mysterious girl with wet, long brown hair and blue eyes partially hidden behind large tropical leaves in the rain and fog.
A surreal portrait of a faceless figure with a burning void replaced by a flame-rimmed black eclipse, set against a muted twilight blue background.
Close-up portrait of a young woman with a striking blue eye reflecting a burning cityscape, featuring a pointed elven-like ear and soft textured skin against a dark background.
Close-up of a woman's face partially illuminated by a narrow vertical sliver of light showing her piercing blue eye, dark eyebrow, nose, and lips against pitch black shadows.
A pale gothic princess in a long black dress stands inside a medieval stone church, gazing out an arched window with warm light illuminating her profile.
A teen girl with large blue eyes and short black hair wearing a green flight suit and sitting inside a spaceship next to a window, rendered in an oil painting style with Rembrandt lighting and intricate details.
A sprawling aetherpunk city with towering spires combining metal and organic elements, featuring a detailed, glowing airship floating above lush cliffs and bridges.
Massive dark tower illuminated by fiery lights at base and glowing red lights near top, with blue lightning striking in a stormy night sky
A female warrior wears a skull mask and black tactical armor, holding a glowing green lightsaber against a dark and smoky background with glowing blue hair.
Cybernetic female android wearing a black and white skull mask with camouflage armor, holding two futuristic guns in a dynamic pose under a structure in a rocky environment.
A mystical moonlit landscape featuring a majestic castle shrouded in fog, a flying dragon silhouetted against the full moon, a brooding knight, and a young woman in white robes standing on a misty cliff.
A slender Japanese woman with porcelain skin and raven-black hair wearing a sleek avant-garde black outfit stands confidently against a wintry, holographic sky with soft pastel hues, evoking a dreamy winter morning.
Dramatic close-up of an intense gothic couple dressed in elaborate black leather and lace attire against a vivid red background, showing romantic and dark elegance.
A pale-skinned woman with short white hair wearing a shimmering transparent lace robe surrounded by large, textured white worms with red tongues, glowing softly against a bright white background.
A vintage-style illustration with a bold coral red background featuring two stylized figures; one wearing a yellow gas mask, striped pants and yellow bags, the other in a patterned kimono, surrounded by small humanoid robots and a silver bucket.
A surreal portrait of two women in flowing gowns levitating above a dark, desolate landscape under a cloudy sky, conveying weightlessness and mystery.
Demon girl with large curled horns, grey eyes, white braided hair, intricate tattoos on one arm, elf ears with multiple piercings, and ornate turquoise jewelry against a neutral background.
Dynamic angled anime-style illustration of a female character with platinum blonde hair wearing a black tactical bodysuit and combat boots, holding a submachine gun against a grey, glitch-effect background.
A man stands facing a cityscape with a symmetrical reflection in water, painted in a contemporary abstract expressionism style with deep blues and purples and visible textured brushstrokes.
A dreamlike lakeside scene featuring a wizard's tower constructed from blue and white Moroccan tiles, surrounded by lush trees with mountains faintly visible in the background, reflecting on calm water.
Close-up black and white portrait of a shaved-head man with intricate head tattoos, heavy film grain, dramatic lighting, and hands clasped showing rings and bracelet.
A girl wearing a red straw hat and white dress walks on a narrow stone path surrounded by blooming pink sakura trees, heading towards a distant mountain temple under a bright cyan sky with floating mountains in the background.
Narrow, winding red bridge glowing brightly in a foggy futuristic cityscape with towering dark buildings and neon accents
Two koi fish, one red and one gray, swimming in a yin-yang formation through a swirling whirlpool surrounded by cherry blossom petals and ink-style wave patterns.
A small teddy bear stands on a bed holding a wooden sword, protecting a sleeping boy from large dark shadow creatures with glowing eyes in a dimly lit nighttime room illuminated by a bedside lamp and moonlight.
Portrait of a woman with short bob haircut and blue eyes, wearing a black turtleneck against an orange gradient background with moody lighting.
Dark and dimly lit scene with thick chains hanging from the sky and a thin elongated mysterious figure walking through a shadowy, surreal maze.
Young person in sleek black turtleneck wearing glossy black over-ear headphones and a glowing orange virtual reality visor against a vibrant yellow background with neon geometric patterns.
Digital illustration of an androgynous figure with sleek dark hair, wearing a voluminous black coat and layered silver chains, set against a swirling psychedelic background.
A dark, towering three-headed harbinger with silver skull masks surrounded by tendrils of dark energy, looming over a burning village with three cloaked figures in foreground.

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