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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.

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
Useful Quality Embeddings aid291
Woman warrior standing barefoot against a flat yellow background, wearing a deep purple kimono with golden phoenix embroidery, holding a large ornate halberd, with a blunt ash-blonde bob haircut.
Amber Style [LoRA 1.5+SDXL] SDXL
Get inspirations

Made on Diffus

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

A silhouette portrait of a person wearing a hat and coat standing in a field at night with a starry sky background inspired by Van Gogh's Starry Night painting.
Portrait of a woman in a black suit sitting on a chair, surrounded by yellow flowers with a green background and moody cinematic lighting
Close-up of a woman wearing sunglasses that reflect a star-filled night sky with bright stars and violet clouds, set against an indigo cosmic backdrop.
A highly detailed fantasy scene with a majestic anthropomorphic tiger adorned with teal stripes and gold armor, standing beside a female warrior in an ornate purple and gold futuristic suit, both set against a starry purple sky above ethereal desert dunes.
An oil painting depicting a cobblestone path winding uphill towards a vibrant blood-orange and blue sunset, flanked by olive trees on one side and an old stone wall on the other, illuminated by glowing fireflies.
Side profile of a woman walking on a rocky hill covered with bright orange flowers under blue foggy ambient light.
A young elf girl with long silver hair lies peacefully on sunlit vibrant green grass surrounded by wildflowers in an enchanted forest, bathed in soft golden rays.
Digital portrait of a platinum blonde person wearing red aviator sunglasses, glossy black leather jacket, and sparkling choker, set against a vibrant red background.
A volcano erupting with glowing lava and thick dark smoke rising against a muted gray sky, shrouded partially by surrounding clouds.
Snow-covered rock cliffs under a deep blue sky with snowflakes gently falling at sunset, revealing a desert canyon landscape in low saturation tones.
Dark futuristic cityscape inside a large cylindrical structure with glowing red lights, clouds, and a striking bolt of lightning illuminating the scene.
Close-up digital illustration of a woman with striking blue eyes, pink wavy hair, freckles, and glossy red lips, showcasing realistic skin textures and metallic makeup highlights.
Surreal collage with four panels: glossy red lips on white, 'she is art' tattoo on skin, black and white bare tree with bird, and orange slices on a shoulder with glass of orange juice.
An old-world tram with warm amber headlights and a digital sign reading 'Casa Lata' glides along snow-covered tracks flanked by bare trees decorated with white lights and orange berries under vintage lampposts emitting a golden glow in a muted, impressionistic winter urban scene.
A blonde figure in a long coat stands near an abandoned F-15 Eagle fighter jet with its open cockpit, surrounded by overgrown grasses under a pale sepia sky in an ink sketch style.
Close-up oil painting of a teen medieval pub waitress Rapunzel with long blond hair, dressed in traditional medieval attire, holding a wooden tray with frothy mugs of ale in a rustic dimly lit pub.
Brooding Victorian cyborg in detailed cybernetic armor wearing a dark brown duster, crafted in sharp-focused digital art style.
Abstract surreal artwork featuring three girls in frilly hooded cloaks with gorilla prints, standing under a gradient sky filled with clouds and a large dark figure with outstretched arms.
A towering science fiction skyscraper with numerous illuminated digital screens and neon lights, set within a dystopian cityscape at night with atmospheric fog and dark blue skies.
A highly detailed floating island with lush green trees and a fantastical city of tall spires, surrounded by turquoise sea and bright blue sky with clouds.
A huge silvery 1930s airship flying over Paris with large portholes showing a luxurious audience inside, illuminated by warm lights against a cloudy sky at sunset.
A detailed digital artwork featuring a figure in black leather attire with a hood and black gloves, adorned with multiple gold cross necklaces and rings, standing behind a pale-skinned person with white hair and golden eyes, also wearing gold cross earrings and necklaces against a white background with an ornate magic circle.
An albino Victorian girl with long flowing white hair wearing a black corseted Victorian dress floats over a dark Victorian London skyline at night, illuminated softly in Rembrandt lighting.
A surreal acrylic painting featuring a woman with long dark hair wearing an indigo shirt. Half of her face is covered by a melting mask that drips downward. Behind her is a large pink full moon with purple and blue melted colors flowing, set against a violet and pink ombre background.
Hand holding glowing jar filled with happy cartoon bees flying inside at night outdoors.
A majestic fantasy castle silhouette atop a forested mountain during warm sunset with dramatic clouds and volumetric lighting.
Oil painting of a Bosphorus landscape at sunset during blue hour with impressionist brushstrokes and textured canvas, showing Istanbul's bustling area and a hilltop terrace.
Anime-style illustration of VTuber Kson with blue hair tied in a ponytail adorned with a blue flower, wearing sunglasses on her head, a choker, and striped dress, drinking bubble tea through a pink straw against a clear blue sky.
A vintage sedan with glowing headlights drives through muddy rain puddles on a rural road under a dramatic apocalyptic sky filled with dark storm clouds and light rays. A farmhouse and power lines are visible in a muted amber landscape.
Surreal tilted-down portrait of a woman with thin metallic rings orbiting her head like a halo system, illuminated by neon pink and soft cyan lights against an ultramarine background.
Monochrome silhouette of a woman backlit to highlight her wavy hair and subtle body contours against a black background, emphasizing chiaroscuro effects.
Girl with brown hair and blonde highlights wearing shutter shades on her head and a pink kimono hugging a black cat that also has shutter shades at night with autumn leaves around.
Detailed cybernetic robot head with smooth white glossy helmet and intricate mechanical components in a dark industrial setting.
Close-up detailed portrait of a white raven with softly lit feathers and bokeh background in natural colors
Detailed digital painting of a female fantasy warrior in golden armor riding an ornate mythical beast with large teeth and intricate golden patterns, holding a gemstone-studded staff emitting light.
A surreal endless swamp with black water reflecting towering giant mushrooms with golden caps and lush green foliage on steep rocky walls.
A mature fairy with silver hair floats in a dark space filled with swirling bronze and orange patterns. She wears a detailed gown shimmering with volcanic colors, surrounded by glowing tendrils that outline an ethereal cat shape in the background.
Profile of a young woman surrounded by delicate white flowers with a soft khaki color palette, created using multiple exposure and low-key lighting in digital art style.
A divine angel with large fiery white and orange wings sprinting through a dark pond, splashing water and red flower petals around her.
Dark digital art of a sailboat with black sails in heavy, choppy sea under thick fog, with faint red glows on the sails and an eerie, surreal atmosphere.

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