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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.

xa_gueuzav (xaxaxa) art style [illustrious-XL] v1.0
Melkor Mancin Style V4 [Illustrious-XL]
Anime-style girl with short dark hair and red eyes wearing a bike helmet, backpack, and pleated skirt, riding a bicycle on a crosswalk at sunset, looking back angrily.
Close-up of a glowing blue and purple crystal surrounded by moss on a wooden tavern table with warm low lighting and rustic wooden beams in the background.
Stylized illustration of a sulking girl with orange hair, deep blue eyes, wearing a chest harness and an o-ring collar, rendered in a partially colored painterly sketch style.
A blonde woman with very short curly hair wearing a light blue mini dress stands laughing joyfully with a dynamic pose against an abstract, glitch-patterned, dark background.
A girl with long black hair and red eyes sits confidently on an ornate chair holding a glowing red katana, dressed in a black floral kimono and high heel boots, set in a dark, chain-decorated room.
30-year-old woman in a bathroom wearing a pink towel wrapped around her head, white tank top, and patterned loose pajama pants, taking a night time selfie with a small smile
Side view of a blonde woman kneeling indoors wearing a floral kimono and thigh-high boots, holding a katana in a rustic wooden room.
Detailed vintage-style illustration featuring a skeletal figure with long hair, depicted in dark red, pale brown, and black hues, set at a Dutch angle.
Oil painting in impressionism style depicting a blonde woman in a white dress sitting on a patterned sofa with a calico cat resting on her lap, both characters showing emotional expressions.
Anime style blonde girl with twin drills hairstyle, decorated with gemstone pins and ribbons, giving a thumbs up with a smiling expression.
A detailed dragon with metallic sheen and intricate pulsing red and blue ais-vesselz veins covering its body.
A woman with dark hair and a red headband wearing a red and white gingham mini dress and black biker boots, sitting on a concrete ledge at night against a textured urban wall with city lights in the background.
Four silhouetted chairs facing a fiery, burning landscape under a dramatic night sky filled with thick flaming smoke and intense glowing flames.
Two anime girls in a neon-lit urban train interior at night, one sitting and one standing, illuminated by glowing city lights outside the window.
A towering bioluminescent abomination called the shrieking hammerbuster with iridescent hide and glowing horns hunts colorful insects in a lush desert oasis on planet Quirklebrock IX under an alien sky.
Sepia-toned photo of a French girl in a leopard print dress sitting in a Paris cafe in the 1960s with her pet jaguar drinking coffee from a cup.
A steampunk-style woman scientist with black hair and green eyes wearing goggles and a leather apron, mixing green liquid in a glass flask in a vintage laboratory filled with glass bottles and equipment.
A beautiful ice sorceress wearing a neon blue crown and asymmetrical icy clothes, sitting on a throne of blue ice with a dark background.
Get inspirations

Made on Diffus

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

Digital illustration of a regal woman with large spiraled ram horns, wearing a red and white gown with gold embroidery and dark braided hair, set against a dark abstract background.
A hooded skeletal figure emerges from deep shadow with neon magenta and indigo colors, featuring painterly textures and glitch effects in a graphic novel style.
A medieval fantasy woman dressed in white tunic and metallic armor sits on the ground holding a large ornate sword against a soft blue background, illustrated in a graphic-novel style.
Retro anime style illustration of an astronaut in a red spacesuit standing in a field of vivid red poppies under a bright blue sky, surrounded by fluttering orange and black butterflies.
Detailed painting of Yoda swimming underwater with his head breaking the water surface, showing colorful water reflections above him.
Surreal retro-futuristic landscape featuring tall geometric monolithic structures, a sleek vintage sci-fi car in the foreground, multiple moons and a glowing sun in the starry sky, all rendered with a 1970s-inspired pastel and earthy color palette.
Portrait of a girl with black hair styled in double buns adorned with tassel ornaments, wearing a floral embroidered black outfit, set against a colorful surreal abstract background.
A futuristic astronaut stands inside a vast extraterrestrial megastructure archive with ornate walls, glowing blue data cubes, and symmetrical arches under mystical lighting.
A dark, gothic female figure in a black high-collared dress and blindfold stands in a graveyard against a red, smoky background. She wears a crown of skulls with black spikes, and crosses are silhouetted behind her.
Female pipework robot with bioluminescent futuristic armor and deep cupped pale shapes under blue lighting.
A fantastical unicorn with glowing aureolin hair galloping through a desolate glacier landscape at night, ridden by a metallic humanoid figure with curved metallic projections, beneath a vibrant nebula sky.
Dimly lit industrial alleyway filled with dense fog, featuring a glowing cylindrical tower and a lone human silhouette walking into the mist.
Close-up of a blue jasper mosaic technological Venetian mask with electronic parts and glowing indicators in low saturation and high detail.
Silhouette of a girl with an explosive burst of white foam and ink splashes emerging from her head against a teal background in an ink wash painting style.
A photo-realistic image of a deserted, dilapidated coffee shop with a glowing orange COFFEE sign and blue awning in front of rocky mountains under a dark blue sky.
Red-haired woman in a glossy haute couture Valentino gown adorned with large 3D orchid flowers, set against a radiant orchid pink background with high fashion dramatic makeup.
Close-up portrait of a cybernetic female android with red glowing horizontal slit eyes, black mechanical jaw and neck, pale freckled skin, dark hair pulled back, and intricate black circuit-like facial implants, surrounded by an industrial environment with orange sodium lighting and floating sparks.
A hyper-realistic figure composed entirely of grass and red flowers, resembling a sepia statue in a dark fantasy forest setting.
Two anime girls with distinctive features, one with cat ears and heterochromia holding a cat perched on the shoulder of the other girl with dark hair and chopsticks, set against a gray background.
A cascading water fountain made of forged carbon with blue and red glowing ornamentation, magic particles floating, set inside a dark, ornate dungeon.
A dynamic close-up of a cyber kimono girl with white and red sakura-patterned hooded outfit, holding a futuristic rifle, featuring glowing blue eyes and a prosthetic cyber leg.
Young girl in profile with dark hair tied back, wearing a distressed teal coat and scarf, with large tattered insect-like wings resembling dried leaves, holding a staff topped with yellow autumn leaves, facing a small orange butterfly.
Digital portrait of a headless necromancer wearing ornate royal armor with a burning crown floating above where the head should be, flames forming ghostly expressions and molten gold dripping upward into the air.
Monochrome knight wearing heavy detailed armor covered in snowflakes, with one arm enveloped in vibrant blue magical spectral fire against a dark background.
Portrait of a young East Asian female with platinum blonde hair in a high ponytail tied with a red ribbon, wearing a layered cream and red outfit with armored gauntlets, standing against a textured rustic background in soft diffused lighting.
A colossal inverted floating pyramid with intricate alien architecture glows with blue light amid a dramatic stormy sky filled with lightning and towering clouds, while a lone figure stands on rocky terrain below.
A mysterious dark warrior cloaked in a tattered hooded cape stands amidst a storm with lightning illuminating the scene, faceless and eyeless with glowing eyes.
Realistic portrait of an elf girl with green eyes and blonde hair wearing a blue hat and dark cloak, with snow falling around her on a nighttime background.
A fantasy scene showing a woman in an ornate red hooded cloak and armor sitting beside a large realistic gray wolf in a misty forest, holding a basket of apples.
Photorealistic image of an albino girl with short wavy white hair and blue eyes, surrounded by large blue peony flowers with glowing floating petals and dynamic blue ribbons under a night glowing sky with blurred lights.
A solitary silhouetted figure stands in a surreal digital dreamscape, surrounded by vibrant layered mountain formations under a dramatic swirling sky.
High-detail digital artwork of a cybernetic girl with blue hair and reflective robotic armor sitting on the ground with a sword behind her, shown from above.
A mechanized woman dressed as a nun with black and white cornette, red glowing eyes, intricate robotic details, long flowing hair, and a red cross on her chest.
Close-up oil painting of an angelic young girl with delicate lace and roses, rendered in hyper-realistic Rembrandt lighting against a black background.
A determined girl wearing a white hooded cloak crouches in a narrow alley holding a sword illuminating the ground with dramatic sunlight, painted in a traditional style.
Young Ukrainian peasant woman smiling joyfully in a sunlit field wearing a traditional embroidered dress with red floral patterns and a woven floral wreath in her braided hair.
Black and white portrait of a woman wearing a detailed silver headpiece, necklaces, and a sheer black veil, with dark makeup and nails, posing thoughtfully.
A small gnome sleeping peacefully in a detailed forged carbon boat floating on a magical enchanted pond surrounded by glowing magic particles and mystical forest.
A tall, slender girl with large yellow eyes and black cat-like ears stands in the center of a street lined with plush-like buildings and various paper people figures. The sky is an intense red-orange gradient, and the scene evokes eerie surrealism and emotional tension in a dreamlike graphic novel style.

Flux.2 Klein — FAQs

Try Klein Without Downloading It

And put it next to Flux.1, Qwen and SDXL on the same prompt.

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2,100+ Models

No GPU

Product screen shoot