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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.

Cyberpunk(Photographic style) SDXL V.1.0
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.
Get inspirations

Made on Diffus

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

A regal young princess in a flowing white gown sitting gracefully atop a tall stack of vibrant colored mattresses in a candlelit chamber, painted in oil with Rembrandt-like style.
Hand-drawn chibi pigeon with tongue stuck and stretched on a metal pole on a snowy urban winter morning, showing confused and concerned expression.
Stylized Cubist artwork of a woman with a white face, green eyes, and red and black paint on a cracky textured surface, featuring geometric shapes and bright colors.
A scarred dwarf warrior with a braided red beard sits at a wooden table in armor while a red-haired elven rune-scribe inks intricate black runes on his forearm, and a gothic elf holds a candle near a rune-covered cabinet in a fantasy apothecary workshop.
A dark fantasy female warrior in intricate black and gold horned armor wielding a glowing red spear, with glowing red eyes, surrounded by red supernatural energy in a gothic cathedral.
A powerful female knight with long silver hair, heterochromia purple eyes, clad in intricately patterned silver armor and a dark flowing cape, wielding a glowing enchanted sword amidst a mystical, moonlit temple background with lightning and floating petals.
Colossal triangular architectural structure with silhouetted human figure standing on rocky shoreline, reflected perfectly in still water beneath twilight-colored sky.
A fierce samurai with glowing red eyes and a slit pupil, dressed in a purple kimono, wielding a glowing red katana in a dynamic battle pose under a stormy sky.
Abstract royal portrait created with pointillism technique, featuring a woman wearing a jeweled crown with dominant indigo skin and garnet and saffron highlights on canvas.
Foggy cityscape with tall buildings covered in scaffolding lit by neon green and orange light, featuring a small figure standing on a rooftop.
Silhouette of lone figure walking on a wet pier toward a glowing lighthouse with a large moon and misty background in a cyberpunk style.
A detailed anime-style cyborg queen with flowing white hair and curly bangs, dark red eyes, gold cables integrated into her design, and cel-shaded in a 1990s cyberpunk fantasy style.
Silhouette of a knight on horseback against a dramatic sunset with dark clouds and distant mountains
A girl with flowing ginger hair and green eyes kneeling outdoors wearing a tweed blazer, white shirt, black tie, and red Scottish kilt with wind lifting her hair and clothes, set against a cloudy sky and green mountainous landscape.
Dark-skinned woman wearing a floral dress and sunglasses, posing with arms raised against a wall covered in ivy and vines, showcasing body tattoos and soft natural lighting.
Closeup portrait of a cybernetic shinobi warrior wearing a horned mask and white armor, holding a large sword in a surreal desert setting with a beige and turquoise background.
A highly detailed depiction of a red-skinned Aka-Oni girl with glowing patterned horns, intricate jewelry, and glowing eyes under volumetric lighting.
A young cyberpunk angel with glowing metallic wings perches on a power pole in a neon-lit futuristic city, holding a glowing sign that reads 'Goodbye Hakugin' during a rainy night.
Close-up of an angry pithecanthropus cyborg featuring ultrarealistic metallic joints on body and face, plastic eyes, mechanical neck, and high-tech headphones.
Close-up black and white portrait of a Black man with eyes closed, white paint dripping across his face like a mask, set against a plain grey background.
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.

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

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