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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.

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
xijie_Platinum v1.0
Close-up of a young woman with brown hair and hoop earrings wearing a white Adidas jacket with yellow stripes, playfully sticking out her tongue in a car.
DnD_Grainyboyz Lora FLUX DnD_Grainyboyz V1.0
Wizard's Experimental Photography Lab Portraits
Vixon's Pony Styles - Piotr v1.0 Piotr v1.0
Elle (based on Rick & Morty Anime) - Illustrious V1
Useful Quality Embeddings aid291
Woman warrior standing barefoot against a flat yellow background, wearing a deep purple kimono with golden phoenix embroidery, holding a large ornate halberd, with a blunt ash-blonde bob haircut.
Amber Style [LoRA 1.5+SDXL] SDXL
Ethereal Glow Flux v2 (Epchs 20)
All Disney Princess (Illustrious) Illustrious
An anatomical chart illustrating a great horned owl as a surveillance drone, showing half natural feathers and half robotic machinery with wires, processors, and sensors.
Get inspirations

Made on Diffus

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

Brightly illuminated vineyard in Cubist style with glowing grapevines and a small melancholic village below under a cosmic starry sky.
A bioluminescent tropical island featuring a wooden house surrounded by lush alien flora and tall palm trees, glowing warmly at night beside crystal-clear glowing waters and vibrant coral reefs.
A dark armored knight stands against a misty teal sky, with flowing hair, glowing crimson eyes, and a sword glowing with embers in the shadowy haze.
A large AT-ST walker stands on a desert plain at sunset, towering over a small human figure with a sky full of clouds illuminated by warm light.
Hyperrealistic depiction of Maha Kali with dark cybernetic armor, intricate mechanical details, and glowing red eyes in moody lighting inspired by H.R. Giger.
A young girl sitting in front of a tall blue building under a clear sky, wearing a white baseball cap, white jacket with hood, black pants, and white sneakers, with backpacks around her.
Top-down comic book illustration of a sprawling futuristic metropolis with towering skyscrapers and a neon-lit sunset sky, featuring vertical gardens and intricate architecture.
A towering demonic creature with sharp horns and torn, decayed skin stands menacingly in a foggy, dark forest, surrounded by faint red flowers.
Black and white portrait of a young woman with long wavy hair, serene expression, surrounded by small brown butterflies on a soft textured beige background.
A dark skull resembling Hantu Melayu disintegrates into swirling smoke and fog against a black background, surrounded by thick volumetric fog.
A vibrant and whimsical scene featuring a joyful girl with long multicolored hair and a colorful dress, dancing with arms raised among giraffes, balloons, and confetti beneath a bright blue sky and a large rainbow.
Side profile of a blonde woman wearing a navy blue cloak and hood, illuminated by white light from large circular patterns on a dark blue wall in dim lighting.
Watercolor illustration of a blonde girl with blue eyes sitting on a black amplifier, surrounded by colorful musical notes on a simple background.
A dark silhouette of a woman wearing a spiked crown stands against a glowing full moon, surrounded by post-apocalyptic ruins and twisted skeletal forms in a desolate landscape.
A candid analog photo of a young woman sitting contemplatively by a rain-speckled window in a small cafe, dressed in vintage 90s grunge style with soft muted tones and film-like quality.
A porcelain-skinned gothic enchantress with intense gaze wearing a black velvet corset and intricate lace gloves, set against a deep charcoal background with dramatic volumetric lighting.
A yellow robotic walker with a digital screen faces a woman in a yellow dress in a desert at sunset under a partly cloudy sky.
A farmer stands in golden fields of flowers, looking towards a distant farmhouse under a night sky dominated by a swirling, vibrant orange nebula emitting radiant golden light.
A hyper-realistic alien jungle basin surrounded by towering cliffs with lush green vegetation and waterfalls. A futuristic research vessel hovers over a clear turquoise lake, with a water spiral floating above it, illustrating a gravitational anomaly.
A futuristic science fiction desert valley dominated by towering black alien monoliths glowing with radiant energy, surrounded by glowing streams and patches of alien flora under stormy skies.
Dramatic digital art showing a monstrous creature with sharp teeth roaring from below, looming over a solitary silhouetted figure with a hat and a weapon.
Stylized male elf with medium red tousled hair, glowing green eyes with vertical pupils, scarred skin, wearing a dark burgundy robe with gold and green glowing snakes coiling around him
A dark angel with glowing halo, large feathered wings, delicate features, and ethereal light, seated in a shadowy, crumbling room.
Digital illustration of Maleficent and Cinderella in a romantic close-up kiss, featuring low saturation and a cyberpunk style with shadowy blue gradient background.
Illustration of a gelatinous cube glowing with a reality-bending aura on the roof of a small abandoned building on a rocky hill, surrounded by trees, in a post-apocalyptic mythical mountain setting during midnight with vintage colors and warm volumetric lighting.
Close-up illustration of a nun wearing a tight black dress with several belts around the torso, holding the hem of her short skirt against a dark starry background, illuminated with dramatic lighting.
Close-up hyper-realistic portrait of a pale-skinned elven princess robot with vibrant red hair, blue eyes, mechanical arms with neon accents, wearing a sleek black dress and a glowing crown, standing in front of a cyberpunk city window.
A confident woman in a vibrant red sleeveless jumpsuit, long red gloves, and a wide-brimmed red hat sitting on a black chair with silver high-heeled sandals on a dark background.
Black and white high-contrast portrait of a young woman with a short bob hairstyle wearing a light crew-neck t-shirt, illuminated from the side with heavy grain and light leaks
Young woman with short pixie cut wearing white ribbed tank top and wide-leg pink corduroy pants, sitting on a white floor, showing chunky pink-soled boots in a low-angle shot in a minimalist studio.
A confident mature woman with gray swirl hair and glasses wearing a red sequined dress stands smiling in a medieval castle bedroom lit by golden hour light.
Small red weathered wooden house tilted on a gentle hill surrounded by wildflowers, with a large blooming pink cherry blossom tree beside it and a bicycle resting against the tree under a pastel blue sky with white clouds.
A massive turtle carrying a paradise-like island with waterfalls on its back fights a medieval army in a barren desert near a long stone wall, breathing fire against the defenders.
A biomorphic aquatic creature with translucent fins and a long stinging tail swims in a dramatic underwater environment surrounded by colorful coral reefs and fish.
A glowing mystical tree with a luminous canopy stands tall by a sparkling pool at night, surrounded by monks in white robes amid a dark mountainous landscape.
A red-robed figure stands on a jagged black cliff overlooking a turbulent, stormy sea under a dark, swirling sky with dramatic, painterly brushstrokes.
A surreal black-and-white fantasy landscape featuring large, intricate trees with organic linework, winding river paths, and textured mountains under a dreamlike sky.
A vintage motorcycle rider wearing a leather jacket and retro helmet with goggles speeds along a dusty road under a cloudy sky, captured in sepia tones with motion blur.
A female warrior with fiery red hair and ornate fantasy armor stands in a dark lair filled with giant dragon skulls, scattered treasure, and glowing torchlight.
Close-up portrait of a cybernetic anthropomorphic cat vampire with jagged castle and bats emerging from its head, detailed with splattered blood and advanced cybernetic textures in a cinematic lighting environment.

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