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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.

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
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.
Get inspirations

Made on Diffus

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

Empty city street at night with reflections of lights on wet pavement, tall skyscrapers lining both sides.
Portrait of a young woman with wet hair and a yellow tint on her skin, lit with moody green lighting and wearing a sheer top.
Young woman with pink hair wearing a black leather jacket standing by a neon-lit city street at night with vibrant red and blue lights.
Black and white photo of a young woman standing against a reflective window with neon signs in a Japanese urban night setting.
A woman in a yellow blouse and floral skirt stands in a sunlit garden filled with yellow flowers, facing a large tree and distant mountain valley under a partly cloudy sky.
Cinematic close-up portrait of a young actress with glowing skin, intense green eyes, red lips, wearing a vintage cream blouse adorned with pearls, under soft warm lighting.
A surreal fantasy landscape showing a dark, spiked fortress resembling a large organic structure with a glowing red eye, surrounded by golden cereal fields and silhouetted figure walking toward its entrance under a warm orange twilight sky.
Surreal vibrant medieval city streets at dusk with shadowy human silhouettes, glowing windows, neon pink sky, and animated city decay details.
Low angle view of a woman's legs wearing shiny black latex pantyhose and high heels, with cinematic dramatic lighting and an otherworldly, glowing halo effect on a dark background.
Digital artwork of an anime girl with blue hair and red eyes, featuring a double exposure effect showing small fox figures emerging from her blue attire.
Black and white photo of an elderly woman with white hair, wearing bat wings and horns, enthusiastically skateboarding down a street with a joyful expression.
A dark knight clad in jagged, demonic armor stands amidst flames and smoldering chains, wielding two bloodstained swords in a fierce battle stance.
Photorealistic portrait of a young blonde woman with heterochromia wearing an off-shoulder black shirt, standing against a peeling textured concrete wall under dramatic noir lighting casting shutter-like shadows.
A tiny otter with a thoughtful expression holding a bright red apple at a supermarket fruit display with neatly arranged apples in the background, illustrated in a Studio Ghibli style.
A man in a formal black suit and white shirt drinks amber whiskey in a dimly lit bar, with painterly brushstrokes and warm highlights.
A giant monstrous yellow 3D Pacman with sharp teeth and a wide open mouth emits a cascading eerie stream over planet Earth, symbolizing planet destruction in a dark fantasy art style.
Portrait of a woman with dark skin wearing a green coat standing against an orange background
A detailed renaissance oil painting of an elderly scholar with a long grey beard, seated by a window overlooking a medieval city, holding a book, wearing a gold-embroidered velvet robe illuminated by warm candlelight.
Silhouette of a couple standing in a grass field at night, illuminated by a glowing circular rim light under a starry sky.
A woman in a brown coat stands still on a bustling city street, with surrounding pedestrians blurred from long exposure while the city buildings remain sharp.
A serene woman with long, flowing black hair sits peacefully surrounded by delicate pink cherry blossoms in soft, diffused light.
A blue-skinned character with intricate mythic jewelry and facial markings, wearing a horned headdress and surrounded by shadowy figures in a mysterious digital fantasy setting.
A digital artwork of a metallic skeleton in side profile with chrome-like emerald-green tinted bones and a radiant golden halo against a glowing emerald green background.
Profile of a woman wearing a black veil adorned with star patterns and intricate lace in a monochrome nature setting
A surreal liminal space showing a large mechanical structure hanging with cables above a forest clearing, where a lone figure stands on a winding path surrounded by tall trees under a moody sky.
A vibrant abstract cityscape with a satin-metallic fluid twisting in a seamless helix reflecting colorful light and glowing outlines under a sunset sky.
Surreal portrait featuring an expressionless person with colorful, high contrast body horror elements, including many eyes and an ikea shark emerging from hair-like patterns.
Silhouette of a girl with an abstract, spherical head composed of colorful halftone dots and chromatic aberration effects in a dark, surreal cyberspace environment.
A man with white hair in a dark suit sits at a wooden desk by a large window, looking out at a massive, cresting ocean wave under a clear blue sky.
Young woman at a serene lakeside hippie retreat wrapped in a colorful shawl with prayer flags and canvas tents in the background at sunrise.
Colorful wet ink painting featuring three meerkats standing tall on a vibrant desert hillside with bright orange, red, and blue hues under a golden sun and silhouetted trees.
Portrait of a young woman with blue eyes, tangled in an intricate web of barbed wire with small red accents, wearing an ethereal light garment against a soft beige background.
Close-up of a red-haired kunoichi with symbol-shaped pupils and blushing cheeks, having her cheeks pinched by gloved hands, rendered in detailed 1990s retro sci-fi anime style.
A female character with black hair and blue eyes wearing a shiny black latex bodysuit with glowing blue circular details, latex gloves, and high heels, sitting and facing backward against a solid red background.
A red-haired, demonic woman with glowing red eyes stands in a dark gothic forest wearing a shiny black latex dress and lace tights, illuminated by moonlight and fiery ground.
Photorealistic young woman dressed as a nun in a black nun dress with cleavage, standing in a sunny garden with greenery and flowers.
A geisha dressed in traditional kimono serving tea in an Old Japan style temple with sliding shoji screens and a wooden table.
A bonsai tree in a pot situated in front of a traditional Japanese shrine with wooden architecture, under a rainy late afternoon sky.
A mystical elven princess with silver-white hair in a sapphire blue gown adorned with silver filigree gently cradles the face of a majestic black panther under a bright full moon with twin crescent moons in the starry night 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

Product screen shoot