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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.

posILustrij v1.0
A tall winged figure in a blue dress adorned with swirling colorful abstract patterns stands against a dark background with artistic splashes and tiny curious characters at her feet.
Sheer Tights (pantyhose) v1.0
White-haired girl with blue eyes sitting on a subway bench with an abstract background filled with many blue eyes.
A glamorous woman in a deep red sequin dress performing with a vintage microphone on a stage with a grand piano and dramatic lighting in a retro nightclub setting.
Aka6 [Illustrious] Style LyCORIS v1.0
A cat girl character with black hair, green eyes, round rimless glasses, cat ears, and tail, wearing an off-shoulder green sweater, kneeling barefoot.
Somman v1.0
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]
Get inspirations

Made on Diffus

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

A slender cyborg girl with a robotic arm stands in a dynamic pose wearing fluffy slippers, a loose pajama shirt, and mini shorts against a warm, abstract sleepy background.
A tall slim girl with short black fluffy hair, red eyes, black bunny ears and tail, wearing a white long tunic with a red cross, standing angrily on a glowing red floor in a dark setting.
Dark fantasy scene of a glowing-eyed girl with horns and striped pantyhose standing confidently before a giant monstrous creature adorned with skulls and glowing eyes, surrounded by lightning and smaller skull-faced creatures.
Heroic figure faces a giant glowing-eyed dragon boss amid dark moody clouds with a distant castle in the background.
A majestic mountain peak at night with a glowing celestial gate emitting pink light, under vibrant aurora borealis and starry sky, with a lone figure standing before it.
A female cyborg sits cross-legged on a New York City pier at twilight, her digital mask glowing red with a LOW CHARGE warning, surrounded by a dark, mysterious atmosphere.
A ghostly glowing anglerfish emerging from pitch-black depths with sharp, needle-like teeth illuminated in eerie bioluminescent light.
Digital artwork featuring a close-up profile of a woman with a bold mohawk made of vibrant neon colors, metallic skin, and an abstract, dynamic background split in bright color blocks.
Dark, dystopian armored figure resembling the Punisher with a grotesque skull helmet and a cracked skull emblem on chest, standing in a bleak post-apocalyptic environment.
Portrait of a woman with blue-toned skin wearing a large black hat and a metallic necklace, dressed in dark elegant fashion with red lipstick.
A half-human, half-machine hybrid with smoke swirling around its head, gazing into its reflection on a weathered, rusty surface, with ancient ruins in the background.
A towering futuristic building composed of numerous orange and gray cubes floating above the ground in a mountain canyon, with a small person standing beneath it under a night sky.
A detailed anime-style wooden Iron Age roundhouse with a moss-covered roof set beside a reflective water body in a dense pine forest during daylight.
A woman with dark wavy hair wearing a fitted long-sleeved red dress stands centered against a bright red background with scattered white papers on the floor, photographed in a minimalist, high-contrast style.
Adorable grey and white fluffy cat lying on its back in a pink pet bed with big eyes and raised paws showing pink bean toes.
Hyper-realistic portrait of a young woman in a light summer dress leaning against a textured wall, softly lit by natural sunlight in an outdoor setting.
Photorealistic portrait of a stunning sci-fi space policewoman with long platinum hair wearing a black police cap and a skin-tight unzipped bodysuit showing cleavage against a sepia gradient background.
A detailed oil painting of a frail, ecstatic teen Duchess in a tightly corseted cream dress with off-shoulder lace sleeves, platinum blond hair in a bun, head tilted back with closed eyes against a dark background with golden leaves.
A white-skinned albino teen cyborg girl holding a white cat, walking down a snowy, deserted street in a post-apocalyptic setting, wearing a black futuristic dress with mechanical details and blue eyes.
A highly detailed futuristic spacecraft with a damaged metallic cockpit featuring glowing blue high-tech HUD elements and red danger warnings, surrounded by floating space debris in dark space.
Black and white vintage photograph of a 1960s young woman with blonde ponytail reading a book while sitting on a rustic wooden bench in an outdoor courtyard, surrounded by natural sunlight and dappled shadows.
Close-up of a biomechanical cyborg's skull-like face with a damaged, rusted helmet split between yellow and black, glowing orange eye, and decayed mechanical and organic elements
A group of Fremen warriors in stillsuits on a sandy ridge amid a dust storm, urgently reacting as a massive multicolored gummy worm bursts from the desert sands on the planet Arrakis.
A surreal desert landscape with giant sand shark creatures and small fisherboats, surrounded by small human-like figures and rocky cliffs under a clear sky.
Close-up hyper-realistic oil painting of a young vampire girl with vibrant red hair, glowing blue eyes, pale skin, and sharp fangs, rendered in a Rembrandt style.
A hyper realistic Moluccan Cockatoo perched inside an ornate antique cage, with vibrant splashes of orange and yellow on its crest, detailed white feathers, and a vivid abstract background in purple and pink hues.
Closeup portrait of a Japanese woman with long black hair and bangs, wearing a denim jacket and white blouse, standing against neon signs on a traditional Japanese street at night with bokeh effects.
A powerful female angel with flowing white hair, clad in ornate golden armor, standing on rocky terrain with glowing golden wings and holding a large sword.
Realistic digital painting of a young woman dressed as a nun with a black habit and white headpiece, smiling broadly and sticking her tongue out playfully.
A silhouetted figure stands on rocky terrain beneath a large, colorful starry nebula cloud illuminated by neon glass filaments in a cosmic space setting.
A futuristic cyborg with glowing white and blue skin wearing a black hoodie, illuminated by chiaroscuro lighting in a dark setting.
A towering hooded dark figure stands in a desolate post-apocalyptic landscape beneath a bleeding red orb, surrounded by crumbling buildings and dark stormy skies.
Close-up of a female cyborg's mechanical face and bionic body with exposed wires and robot joints, detailed and textured with worn white plating.
Semi-realistic image of a purple-haired woman wearing black stockings, a white top with black suspenders, and a choker, sitting on the hood of a vintage red car.
Cyberpunk female android warrior with white hair, black armor with gold and orange glowing accents, holding a large sword vertically in front of her face against a black background.
Close-up portrait of a femme fatale hacker wearing a sleek leather coat, a wide-brim fedora, and round black glasses, lit with dramatic noir-style lighting.
A dark desert landscape under a night sky filled with large, translucent jellyfish glowing with soft bioluminescent light, drifting slowly above the ground.
Close-up of a woman's head and neck in a mixed media collage style, constructed from layered newsprint and bold typography with a high-contrast halftone texture and yellow geometric background.
Side profile of a female ballerina standing en pointe, depicted in red neon line art against a solid black background with a flowing dress and graceful pose.
Space explorer woman in sleek sci-fi suit stands on rocky terrain of an alien planet, with a futuristic tracked vehicle nearby and a large broken moon glowing in an orange atmospheric haze.

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