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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.

Valbun Style Illustrious
[SDXL]LuanFangHua | 乱芳华 | 国风大模型 v1.0
Ri-mix - [Illustrious + Anima] Bravo
A rat-like monster with red glowing eyes, sharp claws, and tattered leather wings wearing detailed dark fantasy armor standing on a log in a foggy forest.
Keij No.01
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.
Get inspirations

Made on Diffus

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

Close-up dramatic portrait of a beautiful young woman with elegant curly hair, soft lighting, and a wrapped fabric showing cleavage.
Full body portrait of an albino teen female cyberpunk pilot with long white hair and blue eyes, standing in front of a giant mecha inside a dark spaceship, painted in ultra detailed oil painting style with realism.
Close-up portrait of a young East Asian woman wearing a futuristic white racing suit with yellow shoulder pads and red accents, with auburn highlights in her messy short hair, set against a bright blue sky.
Illustration of two girls embodying angel and devil themes, one with red skin, horns, demon wings, and black high-heeled boots, and the other with white skin, a halo, pink angel wings, and white fur-trimmed boots, both smiling and holding each other affectionately.
Portrait of Shiela de Tancarville, a sorceress with horned gothic headdress, wearing a dark blue dress, holding a glowing censer on a dim ancient stone staircase.
Futuristic four-wheeled rover with astronauts standing nearby in a dusty desert landscape with large monolithic structures and distant hills under soft lighting.
Two giant black silhouetted human face profiles facing each other with a small human figure in a black coat walking in the desert under a bright orange sky.
Hyper-realistic oil painting of a blushing tween girl in a Victorian winter formal dress and a large black hat adorned with flowers, standing in 19th century Portobello Road Market, London. The painting uses Rembrandt lighting with intricate details and a softly glowing market backdrop.
Expressive charcoal drawing of a tall, crumbling basalt tower ruin with fractured stonework and three weary soldiers in rough tunics approaching at the base under a desolate sky.
A detailed oil painting of a floating island featuring an ancient castle, surrounded by dense forest and a tranquil lake, showcasing intricate architecture and warm tones.
Bright angel with glowing iridescent wings in a dark, ruined room with debris and a huge sailing ship wreck in the background.
Astronaut lying peacefully on a red alien planet covered with wet tentacles and alien plants under dramatic lighting with bokeh effects
A surreal female portrait with a pale, almost sculpted face wearing a black biomechanical crown adorned with glossy red spheres, set against an abstract textured background.
A girl with dark brown wavy hair in a pink sweater dress and pale grey sneakers hugs a lamp post at night, standing on a grassy sidewalk illuminated by dim streetlight, with a somber and wistful expression.
Dark, glowing photograph of a German witch with a bioluminescent black owl perched on her shoulder in a mystical, otherworldly setting.
A chubby woman wearing a multi-layered white bouffant dress with white stockings and black shoes, depicted in pastel watercolor style with delicate pencil lines and vibrant, smooth color transitions.
A grotesque humanoid demon with pale emaciated skin, long white hair, and large bat-like wings with purple membranes crouches on a rocky outcrop in a dark, misty forest under falling rain.
Anime couple lying in a field of flowers, a girl with dark brown hair peacefully sleeping on top of a blonde boy under a blue sky with clouds.
A shadowy fallen angel with tattered wings and a glowing lantern stands in a fog-filled graveyard under a bright full moon, surrounded by gravestones and eerie mist.
A faceless woman dancing in a dark foggy forest with translucent skin revealing red glowing bones and skeletal structure, rendered with dramatic lighting.
A hyper realistic depiction of an enormous lamia adorned with intricate gold chains, baring steaming poisonous fangs, coiled and ready to strike with dramatic lighting.
A gothic witch standing waist-deep in murky swamp water holding a lantern filled with green fireflies, wearing a dark ornate crown and robes, with skeletal hands reaching from the water around her.
Digital art of D.VA from Overwatch in a tight blue and white bodysuit, holding a handgun while kneeling, with a large close-up of her brown-eyed face in pink tones in the background.
A pale woman in a black lace corset sleeps across an ornate iron throne, cradled by a hooded raven-winged knight in black armor holding a silver sword, set in a frozen glass conservatory with hanging antique keys and wilted purple lilies under blue-gray moonlight.
Pale spectral woman with long wet white hair crouched in dark flooded ruined environment with torn slip dress and striped leg wraps, surrounded by thorny root silhouettes and vertical rain.
High-contrast monochromatic illustration of a figure with long white hair, black jagged wings, sitting on a weathered concrete block against a red background with film grain and motion blur effects.
A sepia-toned detailed illustration of a giant mantis-like creature perched atop a muscular statue in a serene city park with trees, benches, and urban buildings.
A hyperrealistic snow leopard captured mid-air in an attacking jump with claws extended, snarling, amidst snow flying in a cinematic winter forest setting.
Digital art of Lust from FMA with long black hair, red eyes, a confident smile, wearing a black off-shoulder dress and elbow gloves, glowing with a blue aura.
Anime-style artwork of a blond-haired boy and orange-haired girl sharing an upside-down kiss while lying on grass, with vibrant colors and cinematic lighting.
Close-up of a cute femboy prince with short wavy brown-blonde hair and blue eyes, wearing a golden tiara and fur-trimmed clothing, smiling with closed eyes while holding a spoon and plate with pudding.
Close-up of a girl with coral eyes and multicolored short hair wearing an ornate gold headdress adorned with flowers and tassels, making a heart shape with her hands against a red background.
A massive bioorganic eye with red and black details framed by an ornate baroque mirror, facing a small figure with white hair on a glowing cyberpunk grid floor.
A humanoid cyborg with alabaster skin, glowing red eyes, intricate circuitry patterns on her face, wearing a black hooded cloak and ornate dark armor, set against a blurred forest background.
A digital painting of an albino teen cyborg girl with white flowing hair, blue eyes, wearing a black mechanical bodysuit, featuring a sci-fi digital mapping grid and glowing HUD elements on her face.
A digital painting of a tiny, distressed white kitten with chaotic fur and large, malevolent orange eyes, styled with black outlines and an Art Nouveau influence.
Cyberpunk young albino teen girl with long white hair and glowing blue eyes in a foggy city street, wearing dark clothing and surrounded by cinematic lighting.
A tall bearded man in a crimson embroidered cloak with glowing blue runes on black leather gloves, holding a crystal vial with swirling purple liquid against a dramatic, warm golden sky.
Low-angle portrait of a woman with emerald green eyes, wearing a sheer black gown with silver embroidery and a turquoise brooch, posed in a desert at sunset with motion-blurred hair.
English runway model in a shinobi-inspired outfit featuring a red scarf, blue kimono skirt, and red obi sash, standing amid floating light orbs casting shadows in a minimalist room.

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