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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.

A girl rowing a small boat in a stormy sea with large waves and a swirling bright sky above, anime style
Cross Belt Blindfold | Illustrious Illustrious 2.0
A mystical forest guardian wearing ethereal white robes stands barefoot in a dark forest, her glowing blue antlers adorned with moss and vines, with shimmering eyes and cinematic lighting.
Eldritch Fantasy for Flux v1.2
Rhea/レア (Fire Emblem: Three Houses) SDXL LoRA | 5 Outfits [Illustrious] v1 (Illustrious)
zhongfenghuaStyle_FLUX_ Lora | 厚涂笔触_FLUX版_ Lora v1.0
Extreme close-up of a person with ashy skin wearing aviator goggles with colorful reptilian lenses, bright green lipstick, long black hair with vibrant green streaks, and blue ribbons, surrounded by neon bokeh light effects.
A pale-haired gothic sorceress clad in detailed black and gold armor wielding a rune-inscribed sword, standing on rocky terrain before a colossal obsidian dragon with glowing crimson eyes, set against a pink and purple ethereal sky.
A girl with folded ponytail wearing a white dress with Juliet sleeves and white strappy heels sits calmly on a wooden bench next to a fierce black dragon, illuminated by dappled sunlight filtering through surrounding foliage.
Nova Furry XL Illustrious v6B
Stormtrooper outfit v1
She-Venom (Illustrious) v1.0
Ant King Beru Solo Leveling IL / PD / XL-GMR Ant King Beru Pony-GMR
Fusor's Cute-sor Style II [Illustrious] v1.0
Get inspirations

Made on Diffus

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

Azuma Seren anime girl with white multicolored hair and black gloves holding a bouquet of orange and white flowers in front of her face, standing under bright blue sky with clouds, painted in impressionism style.
A glowing chibi fire fox with flowing fiery fur sits in a lush field illuminated by glowing crystal flowers under a star-filled night sky.
Side profile of a male figure wearing an animal skull mask with large curved horns and a textured cloth hood against an orange background, featuring a film grain effect.
Young woman with red backpack gazes at a colossal industrial ring structure over a vibrant golden field and rolling hills under a bright blue sky with fluffy clouds in detailed anime style.
Black and white dramatic image of a majestic white horse galloping on a midnight beach with flowing mane and tail, under a glowing full moon and sparkling ocean waves.
A futuristic whale-shaped floating city gliding through the fjords of Norway at golden hour, with solar rooftop gardens, bioluminescent labs, and surrounding mist.
A shattered ornate golden crown lies on cobblestone pavement beneath an archway with a sprawling royal palace featuring towering spires and warm sunset hues in the background.
Portrait of a female space pirate with platinum bob hairstyle featuring a red streak, wearing a headset communicator, dark eyeshadow, red lips, and battered red and black power armour with iridescent textures.
Profile portrait of a serene black woman looking slightly up, surrounded by vibrant pink water lilies and green leaves in soft vintage beige and green tones with film grain texture.
Side profile of a person wearing a photorealistic futuristic white helmet with glowing blue lines and mechanical details, dressed in a dark cybernetic suit.
Back view of a frost mage conjuring swirling icy magic and shards, standing defiantly on a frozen battlefield facing a towering fiery horned demon.
Watercolor-style portrait of a woman with blue skin and flowing purple hair wearing futuristic sunglasses on a pale background
A dark, surreal digital artwork featuring a crouching female figure with vibrant red and blue paint splash flowing from her head against a black background.
Close-up of a photorealistic horror-themed woman with glowing red eyes and sharp teeth, black hair, red nail polish, and wearing a dark kimono.
Monochrome noir-style image of a woman detective with short gradient black hair wearing a trench coat and detective hat, smoking a cigarette while leaning against a cracked wall at night near a beach with city lights in the distance.
A young woman with short black hair and a white baseball cap rides a bicycle along a tree-lined street during the day, with cars and people in the background.
Back view of a woman with long pink hair leaning over a metal railing wearing black overalls and black Converse sneakers against a night cityscape with street lamps and bokeh lighting.
Black futuristic hexagonal robot standing in a cafe, featuring a blue circular screen displaying a white coffee cup icon, a digital menu board, a lit candle, and a coffee cup on a tray.
A delicate teen duchess with platinum blond hair and blue eyes in a tightly corseted Rococo dress, holding a worn sign that says 'Bye LizArt' inside a Victorian bedroom, painted in a detailed oil painting style inspired by Rembrandt.
A young woman wearing a vibrant rainbow-colored skirt and high heels stands divided between blooming flowers in daylight and a dark, cinematic night background.
A close-up of a molten gold eye embedded in a swirling fractal obsidian cosmic void, featuring hieroglyphic sigils on its iris, surrounded by dark crystalline ribbons and bioluminescent details.
A cyberpunk girl with white hair and red streaks wearing an exoshell suit and mask, squatting in a dark futuristic laboratory holding a glowing holographic butterfly with cables plugged into her back.
Dark-skinned female dragon girl with white hair, wearing tactical gear, gas mask, and backpack, standing in dusty ruins with torn cape and dragon tail.
A small chibi kodama wood spirit releasing a glowing Chinese lantern into the night sky over a photorealistic pond and meadow with many floating lanterns and bokeh lights.
Photo-realistic portrait of a woman with long wavy black hair and blue eyes, wearing a sheer light-colored top, shown from a profile camera angle with soft lighting and a beige background.
Double exposure portrait of Himiko Toga with silhouette and interstellar space opera theme, featuring cosmic landscapes and neuron-like space elements
Closeup silhouette portrait of a Japanese sci-fi warrior wearing an Anubis-style helmet with a dark outfit and flowing hair, standing in front of Egyptian pyramids and a glowing orange moon.
A warrior clad in ornate armor rides a dragon-like horse with large wings through raging flames and embers, escaping a fiery hell, rendered in a detailed, realistic fantasy art style.
A dark, moody watercolor-style illustration of a molecular structure viewed from a low angle, featuring interconnected transparent spheres with glowing lines on a blue gradient background.
A fantasy woman with pale skin and braided dark hair is embraced by a large menacing red creature with glowing yellow eyes and sharp teeth, set against a dark background.
A figure cloaked in shadow stands before a towering wooden gate engulfed in bright flames in an ancient, misty forest, surrounded by burning embers and charred trees.
Vibrant pop art portrait composed of ultra-fine parallel contour lines in electric pink, cyan, yellow, and magenta, flowing smoothly across the face and hair against a bright blue background.
A digital illustration of a mysterious figure wearing a dark hooded cloak with detailed gold patterns, glowing red eyes behind a metallic mask, holding a glowing orb.
A woman with long curly hair adorned with red roses, wearing a vintage white dress, standing against a dark stone wall in a moody atmosphere.
A slender bat girl with short hair, prominent bat ears, and large arm wings wearing a black outfit with neck tufts, set against a high contrast gray and pink background.
Two figures dressed in black streetwear stand facing an orange and red graffiti mural in a dark urban setting, one holding a knife.
A dark fantasy portrait of Yennefer of Vengerberg standing on a gothic balcony during a storm, featuring her in a black feathered gown with violet eyes and flowing raven-black hair.
A lone figure walks through tall, dry grass toward a large wrecked ship perched on an orange hillside with scattered ruins under a pale sky, rendered in Kibromoks art style.
Highly detailed cyberpunk portrait of a female android with short pink and purple hair, glowing red eyes, and intricate mechanical body parts against a white background.
Photorealistic humanoid robot completely covered in overlapping PG-13 sticky notes with only the metallic face exposed in a dark blue-lit server 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