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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.

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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.

[Pony] Geekpower Artists Style Optionaltypo
Terrifying Clown (FLUX) flux v1
Nani Pelekai (Lilo & Stitch) - Lora Illustrious Illustrious
Akabur Style PDXL, Illustrious Akabur V2.5
Frank Flux-etta V1
A surreal abstract portrait of a young woman with platinum blonde hair and pale skin, her face partially obscured by bold, colorful horizontal brushstrokes in yellow, blue, red, green, and white against a dark background.
biostuff experiments - mushroom house v0.1 mossystuff
Shrekman Style MIX v1.1pony
Woman in a pink summer dress with lace trim, wearing a straw hat and large hoop earrings, with chestnut hair and olive skin, leaning against a textured wall.
See through blouse - no bra V0.1
Cherry-Gig Style for PonyXL v1.0
MorgyMix-illustriousXL v4.1-Painterly-AAAAAAAAAA
Makima (Chainsaw Man) Flux LoRA v2.0
xijie_Platinum v1.0
Close-up of a young woman with brown hair and hoop earrings wearing a white Adidas jacket with yellow stripes, playfully sticking out her tongue in a car.
DnD_Grainyboyz Lora FLUX DnD_Grainyboyz V1.0
Wizard's Experimental Photography Lab Portraits
Vixon's Pony Styles - Piotr v1.0 Piotr v1.0
Elle (based on Rick & Morty Anime) - Illustrious V1
Get inspirations

Made on Diffus

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

A lone figure standing on a desert dune enveloped in a vast, ethereal caramel-colored fog with soft shadows.
A surreal landscape featuring a winding wooden path over reflective caramel-colored water, surrounded by leafless trees and red reeds, with a large subtle red sun in a pale sky and a misty background.
Majestic warrior with silver hair and antlered crown rides a massive snow-white owl with golden eyes, set against a night sky illuminated by auroras over snowy mountains.
A narrow glowing yellow-orange light streak resembling sunlight pierces through a misty cliff gap, surrounded by dark rocky rockfalls and green vegetation under a soft, surreal atmosphere with depth of field.
Digital portrait of a blue-skinned man wearing a black suit and a tall chrome crown against a vivid red background.
Mysterious cyberpunk cultist nun with a golden chained veil, wearing a futuristic black and white overcoat in a dense jungle illuminated by red neon light.
Hyper-realistic portrait of a colossal chrome knight with surreal armor, purple scarf, and yellow robe inside a dim castle interior.
A detailed portrait of a young woman with blue eyes wearing a floral crown and a fur coat, illuminated with soft, cinematic lighting.
A whimsical caricature featuring a large, blue and orange cute fish with exaggerated eyes, accompanied by three smaller colorful fish.
A girl with very long red hair tied in a folded ponytail wearing a green flower dress and a backpack standing on a rooftop during sunset with bokeh lights and blurry background.
A hyperrealistic cybernetic robotic arm and hand with red paint dripping, holding a transparent glass cube against a soft, light background with shallow depth of field.
A stylized white fantasy animal with red eyes and sharp claws stands confidently on a white background, rendered in detailed PastelInk style.
Black and white photograph of a tattooed punk rock woman sitting on a tall wooden stool with combat boots, styled with pigtails and dramatic makeup.
White cat with black markings standing on a smooth white curved balcony overlooking a calm blue sea under a gray sky, shot in analog film style with natural light and film grain.
Photorealistic scene of an astronaut sitting on a rocky mountain peak on Mars with a vast mountainous landscape, clouds, a large moon, starry cosmic sky, and an alien spaceship flying overhead.
Young Rapunzel in an elegant silk kimono kneels inside a tatami room, holding a black Easter egg decorated with gold flowers, bathed in warm light.
A red-haired woman in a teal Victorian dress sleeps peacefully on moss-covered rocks, embraced by a large whimsical black creature with glowing eyes in an ancient forest filled with wildflowers and morning mist.
A lone traveler stands on rocky terrain overlooking a vast alien desert with tall black obelisks emitting blue glowing inscriptions under a stormy purple and blue sky with lightning and distant mountains.
A towering futuristic crystalline spire glowing softly against a twilight sky, reflected perfectly in calm water with a glowing lotus flower in the foreground.
Highly detailed futuristic sci-fi cityscape at dusk featuring towering skyscrapers, sleek flying vehicles with red lights, and a metallic river reflecting dramatic orange and purple clouds.
A young woman with fair skin in an elaborate blue and white Victorian-style gown poses gracefully in a luxurious room decorated with white flowers and ornate furniture.
Hyper-detailed surreal cybernetic portrait of a female figure integrated with biomechanical elements and a technological charging station, set against a cloudy sci-fi backdrop.
A woman with short brown hair stands on a wet urban street at night holding a large black umbrella. She wears a black wool poncho, beige ruffled skirt, white leg warmers, and black patent leather heels, with illuminated city signs in the background.
A confident woman wearing a black hijab, fishnet stockings, and stiletto heels holds a knife against a dark blue gradient background with dramatic lighting.
A monochrome close-up portrait of a young person with platinum blonde hair and closed eyes surrounded by white smoke curls, lit with dramatic side lighting and added noise.
Black butterfly with motion trails cutting through a bright white circular artificial sun on a monochrome background with abstract, gestural lines and heavy negative space.
Two girls, one blonde and one with brown hair, cuddling while lying under a tree in dappled sunlight, surrounded by grass and a scenic natural landscape.
Close-up macro view of a coral-like filigree sculpture resembling a girl’s face and neck, with intense deep red color and intricate porous texture set against a dark gray background.
Half-body portrait of a heroic tween female space pilot with red hair and blue eyes wearing a futuristic metallic spacesuit. The background shows space with stars and a planet.
A pale-skinned young girl with long white hair in a futuristic black corseted dress hugging a biomechanical alien, with dramatic Rembrandt lighting and dark background.
Black-and-white close-up portrait of a melancholic woman with short curly hair wearing a wide-brimmed hat, shown in a cubist collage style with overlapping rectangular frames and vintage film grain texture.
A mystical female figure with glowing amber eyes, adorned with shimmering blue crystal textures, silver-white hair, and an intricate metallic crown with icy spikes, set against a blue-toned, detailed background featuring leafless branches.
Highly detailed CGI of a sleek white futuristic spacecraft with glowing blue engines flying over a green island with a sandy beach and a sprawling sci-fi cityscape in the background.
A towering space elevator rises from a vibrant futuristic coastal city at twilight, with illuminated buildings and floating vehicles under dramatic cloud-lit skies.
A futuristic white cylindrical tower rises vertically through a deep rocky canyon illuminated by a blue glowing base, with textured reddish-brown canyon walls under a gradient blue sky.
A ghostly samurai skeleton with glowing red eyes wearing rusted ancient armor stands beneath a cherry blossom tree illuminated by full moonlight with falling petals.
Androgynous cyborg suspended inside a glowing, futuristic Borg-like cube floating above a sprawling, neon-lit dystopian cityscape with drones flying around.
A faceless god with glowing orange eyes, clad in a dark, lightly armored robe with a white fur collar, holding a glowing celestial energy in their hands against a cosmic background.
A cyberpunk-themed digital illustration of a young woman with a pink mohawk, wearing colorful futuristic clothing and cybernetic implants, walking confidently in a neon-lit city at night accompanied by a small kawaii pet, with spaceships flying against a large bright moon in the background.
A hyper-realistic portrait of a woman wearing a translucent ice mask with crystal frost patterns, dressed in an intricately embroidered white winter gown against an orange-red background.

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