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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.

Protoneon - Illus x Niji v1.0
Color Palettes Red Black & White
Jinx (Arcane / League of legends) | FLUX + Zimage Flux v2.0
Okami Style [FLUX] v1
Suleika Vicious Suleika Vicious
Lovecraftian Nightmare Landscapes Flux
STYLES | PONY & ANIMAGINE RMS v0.1 (Pony V6 XL)
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.
Temogam Art Style v2.0
[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
Get inspirations

Made on Diffus

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

A man and woman holding hands and standing by a large circular window, admiring a detailed futuristic cityscape with skyscrapers and a river under a bright sky.
A sci-fi woman with wild blonde hair stands confidently inside a mechanical and surreal spaceship interior, wearing a long orange coat and black boots.
A futuristic warrior clad in highly detailed power armor with a helmet, holding a large red and black spear in a war-torn cityscape background.
A woman in a futuristic orange outfit with black gloves posing dynamically in front of a mechanical and organic spacecraft background in outer space, with flowing fabric and contrasting light and dark elements.
Portrait of a serene female figure with a pale porcelain-like face, adorned with an intricately designed black and gold ornate headdress featuring baroque filigree and cosmic symbols, wearing a high-collared black garment with golden embroidered patterns.
A slender Japanese woman striking an eccentric, dynamic pose wears avant-garde armor-like fashion with spiked details, standing on a snowy rock under a sky filled with a holographic grid of cold-colored patterned figures.
Side profile of a futuristic geisha wearing an emerald green kimono and a transparent glass headpiece with flowing fractal designs, styled in Sorayama and Yoshitaka Amano influences.
A dark cavern entrance illuminated by a red-lit doorway with two hooded figures standing guard with glowing red eyes, mist and a narrow river flowing through jagged rocks.
A calico cat peacefully sleeping on moss-covered ledge surrounded by red flowers, featuring a cyberpunk-style robotic arm prosthesis, with a twilight ambiance and graffiti-covered walls.
A girl with black hair wearing a brown trench coat and gloves stands on a rainy city street at night, illuminated by warm bokeh lights with an exhausted expression.
Close-up of a sleek black supercar front under low light with glowing LED headlights, matte and glossy textures, and carbon fiber details.
Vibrant digital art of a glowing girl sitting on a traffic light against a bright blue sky with pink contrails and sparkling effects
A futuristic spherical spaceship featuring a mechanical and organic design with a flowing caramel-colored surface contrasting white, set in a surreal outer space environment with cyberpunk influences.
A digital painting of a sprawling geometric urban cityscape under golden light with abstract Bauhaus design elements and towering buildings.
A woman in an intricately detailed rococo ballgown made of feathers stands in a green, mystical environment with towering rock formations and billowing mist.
A towering abyssal punk structure made of star fruit with glowing purple lightning and bright glitter, set in a dark apocalyptic void under a starry sky
A surreal landscape featuring a hut beside a reflective lake, large golden planets floating in the starry sky, and a large tree with golden leaves in vivid colors and multilayer paint splash style.
Realistic image of a redhead woman with freckles and blue eyes wearing a black beret and casual outfit holding hands on a city street.
Close-up portrait of a cybernetic female combat cyborg with anodized metal body parts, glowing orange eyes, and intricate mechanical detailing under cinematic lighting.
A stylized digital anime portrait of a woman with short messy silver hair and striking teal eyes. She wears a melting gold mask that drips down over her face and shoulders, set against a cascading waterfall background.
Woman wearing a turquoise scarf with fringe and fur coat looking at her reflection in a small round mirror with snow-covered trees in the background
Young woman with blonde hair in a black suit and red striped tie, sitting on a rainy rooftop with cigarette smoke rising, under a dramatic stormy sky.
A classic red and white tram floating mid-air above a bustling cityscape during sunset, framed by vibrant pink cherry blossoms.
Haunting upper body portrait of Hatsune Miku with pigtails and iconic dress, her face a void and body dissolving into digital code and light particles.
A tranquil woodland scene featuring a cozy witch's cottage with a moss-covered roof beside a clear pond, connected by a wooden bridge amidst lush greenery.
A massive stone guardian lion statue with glowing orange eyes stands animated in front of an ancient palace gate during a thunderstorm, surrounded by lightning, with a lone figure glowing blue standing at the gate entrance.
A highly detailed 3D emblem featuring an intertwined powerful Chinese dragon with jade-green scales and a roaring tiger with bold orange-and-black stripes, surrounded by lotus flowers and Asian ornamental patterns.
Close-up of a bird warrior with an eagle's face partially covered by a beige headscarf, wearing ornate metallic shoulder armor, set against a blurred desert background.
Digital artwork of a blonde girl with wavy hair and a surprised expression standing with crossed arms inside a crowded subway car, wearing an office uniform and thigh-high socks with a dark, cinematic atmosphere.
Two cloaked figures watch a glowing beam of light descending from an ancient ornate ring suspended in a mystical sky over Laqoris plains.
Man and woman in 1970s-inspired fashion dancing on a glowing multicolored retro dance floor with hanging glowing orbs and crowd in vintage attire.
Close-up of a hooded figure with fiery orange eyes glowing intensely in the dark, surrounded by warm flames and shadows.
A surreal black-and-white image of a floating temple supported by a twisted spiral staircase made of skeletal leaves, surrounded by thick clouds and draping ink-like structures.
Portrait of cascading lattice of golden thread intertwined with intricate obsidian petals glowing with bioluminescent runes and surrounded by iridescent mist and swirling blue and purple energy.
Close-up of a faceless astronaut standing in a blue mist wearing a space suit with a red horizontal stripe across the visor
A night sky featuring two bright crescent moons, a silhouetted figure standing on a hill against a glowing full moon, and the dark outline of a tree blending into the sky.
A photorealistic image of a male anthropomorphic gorilla wearing a teal floral suit, black gloves, and a tie, sitting in the driver's seat of a vintage car with a cityscape in the background.
A digital artwork showing a gigantic futuristic whale hovering above the sea with a solitary figure in a white dress standing on the shore, surrounded by dark fantasy castles on cliff sides under a high contrast, cinematic blue-lit sky.
Portrait of a pale-skinned woman with smooth obsidian-black hair and sharp bangs, her skin glittering with cosmic light reflections. She wears neon pink-purple eye makeup and glossy red lips, adorned with gold chains around her neck, set against a starry retro-futuristic purple and teal sky.
A striking image of a woman standing against a stormy blue background with tempestuous winds blowing her hair and dress.

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