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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 person dressed in an ornate metallic steampunk outfit stands on a foggy cobblestone platform holding a detailed gun, with a vintage steam train in the background.
Digital line art illustration featuring a woman reclining on a soft surface, viewed from behind, with flowing long blue hair and silk fabric draping over her legs, surrounded by glowing bokeh lights and orbs on a white background.
ComicSimp v1.0
Vixon's Pony Styles - Kehoe v1.0 Kehoe v1.0
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
Get inspirations

Made on Diffus

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

A detailed digital illustration of a female angel with black and red hair, red eyes, white feathered wings, a cracked floating halo, wearing a black vest, white shirt, and red tie, featuring visible tattoos and scars on her arms.
Portrait of a young teen girl with translucent pale skin and white hair wearing a futuristic black corseted dress with intricate biomechanical patterns and red glowing accents, set against a dark background with tentacle-like structures.
A spinning black ceiling fan with a colorful string of Christmas lights tangled on its blades, causing a decorated Christmas tree to lean. A panicked, dizzy chibi cat hand-drawn in colored gel pens clings tightly to one of the fan blades in a warmly lit living room.
Vintage pulp sci-fi paperback cover featuring two astronauts leaning on a round spaceship hatch, sharing an intimate gaze against a purple starfield backdrop.
A solitary silhouetted figure stands in front of a massive triangular window inside a dark underground chamber with glowing geometric orange lights and reflective floor.
Silhouette of a lone sailor on a small sailboat with large red sails during a vibrant sunset, calm water reflecting the sky and sailboat.
Surreal digital painting of a beach at sunset with two figures standing on a rocky shoreline, surrounded by futuristic towering spires and a large glowing sun.
A graceful ethereal woman in a flowing white gown stands beside a surreal blue tree under a glowing full moon, with gold accents swirling around them in a mystical night sky.
A silhouette of a worker holding a glowing wrench standing on a tall tower adorned with branches and gears, under a large sepia gold glowing dome surrounded by clouds.
Highly detailed marble sculpture of a muscular angel with curly hair and large wings, depicted in a contrapposto pose with Renaissance art style influences.
Korean female in a biomechanical cyberpunk-style silver spacesuit illuminated with glittering lights, set against a moonlit celestial background.
Close-up of a photorealistic person with a cybernetic neck featuring glowing red and blue circuits, wires, and mechanical parts in Mecharobandro style.
A surreal landscape with twisted black trees against an orange mountainous horizon under a dark moon, featuring intricate rune-like lines and ethereal patterns blending granite gray and fiery orange hues.
A mature woman with long flowing red hair and red eyes, wearing a white elegant dress with golden ribbon lacing, standing in profile against a dark background with glowing particles and cinematic lighting, featuring branched deer horns and ears.
Colorful alcohol ink painting depicting a mad science chemical reaction with vibrant liquids bursting out of an Erlenmeyer flask
A yellow-haired angel girl with a halo and large white wings playing an electric guitar beneath a starry night sky with glowing music notes floating upwards.
A lanky boy with white messy hair and wide eyes stands in an alien junkyard surrounded by odd-shaped spaceships, robotic creatures, and floating glowing toadstools, illustrated with loose expressive lines and watercolor splashes.
A skeletal, gaunt female figure with pale translucent skin stands in a dark gothic chamber, draped in tattered shadow-like garments, surrounded by small pink cherub dolls clinging to her back, with arcane symbols on the walls and a stained-glass window above.
A serene neoclassical architectural scene featuring large stone columns, a grand archway, Renaissance-style buildings, and calm water reflecting the classical structures under a blue sky.
A solitary woman silhouetted against a twilight sky with rain falling on a wet cobblestone street in a graphic-novel style urban setting.
A vibrant orange tulip in a rainy forest with raindrops on its petals and leaves. Under one large green leaf, a small chibi kodama wood spirit with large black eyes shelters itself from the rain.
Chibi girl with black hair wearing blue overalls and a red hat stands in a surreal pink tree forest with a black cat on her shoulder.
Digital art of a Scandinavian woman with long ash-blonde hair holding a cup in a cozy hygge-style living room with warm natural light and minimalist Nordic decor.
A girl with long orange hair and green eyes walks through a vibrant watercolor field of flowers, wearing a dress decorated with colorful floral cat shapes.
A digital painting of a rugged prospecting ship with green lights navigating a dark landscape of crystalline debris beneath a colossal shattered planet glowing with electric blue and magenta energy.
Tall, slender Dracula's castle with crimson roofs atop a rocky hill silhouetted against a red moon-lit night with atmospheric haze.
Hyperrealistic close-up portrait of a vampire countess with pale skin, crimson eyes, and black hair tied with a red velvet ribbon, wearing ornate Victorian jewelry and a lace collar.
A surreal alien landscape featuring towering futuristic ruins and jagged mountains beneath a vibrant sky illuminated by twin suns and auroras, with a silhouetted figure in the foreground.
Photorealistic portrait of a person wearing an intricate mechanical mask with metal gears and rivets, dressed in a dark formal suit, white shirt, and maroon tie, set against a dim industrial background.
A spiraling staircase with ancient and futuristic textures leads upwards through a glowing portal into a surreal landscape featuring waterfalls and floating structures under a colorful vortex sky.
Two dark, heavily textured figures stand side by side with dynamic motion blur and ethereal glowing light behind them creating surreal reflections.
A digital painting of a dark-skinned woman with long flowing hair in intricate tribal clothing sitting on a rock cliff, looking contemplative beside a fierce, roaring lion under a cloudy sky with birds flying.
A miniature woman with short purple hair relaxedly floating in a huge coffee cup filled with steaming liquid, wearing a purple swimsuit and swim shorts.
Illustration of a lonely girl with big eyes, blue lips, and short twintails emerging from an abstract pink background.
An abstract summer scene featuring a black-haired girl peeking from behind a wall, a sitting cat, a meteor sparkling near a puddle on an orange-themed background.
A cyberpunk girl with dark hair wearing pink neon glasses and headphones around her neck, sitting in front of retro computer consoles with green glowing screen and purple-blue neon lights.
A detailed fantasy cliffside village at night with stone buildings illuminated by warm windows, winding stone staircases, lush stylized trees, a large full moon, swirling textured clouds, and a dark ocean view.
Precision-cut paper silhouette of a young woman in warm ochre and burnt orange tones with a deep cerulean paper branch hosting five ochre birds, layered over a gradient watercolor background from pale amber to deep indigo.
A futuristic astronaut in a sleek space suit holding a young girl with long golden hair inside a high-tech space station on the moon, with a large window showing the lunar surface and Earth in the background.
A highly detailed futuristic cyborg robot with pink metallic armor and braided hair, featuring glowing red lights and mechanical joints.

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