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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.

Velvet's Mythic Fantasy Styles | Flux + Pony + illustrious + ZiT + Anima + Krea2 Pony Anime Illustrations
Not Artists Styles for Pony Diffusion V6 XL Smooth Anime [M]
A dynamic illustration of a girl in a floral summer dress throwing a baseball towards the viewer, set against an orange background with motion lines and dramatic perspective.
Cyberpunk android with a robotic arm standing in a steamy shower with rain falling, viewed through a wet glass panel, set against a futuristic city backdrop at night.
Photorealistic image of a Japanese girl with blue bob hair wearing a shiny white and black edgPlugsuit bodysuit sitting on a rooftop at sunset in Tokyo.
Steampunk woman wearing a corset dress and tiny top hat, holding an owl, standing framed in a riveted teal train doorway with cinematic low-key lighting.
Humans LyCORIS v1.0
Portrait of a nordic female demon with flawless crimson skin, white marble horns curving from her temples, sharp white graphic eyeliner, and avant-garde red couture fashion against a smoky gray background.
Anime-style girl in a pink hoodie bending forward, tying red high-top sneakers, with long brown hair and a green backpack outdoors in a park setting.
Portrait of a cyberpunk girl with pink hair, yellow eyes, sharp golden teeth, wearing a futuristic black outfit and metallic collar against a vibrant neon background.
A futuristic robotic insect warrior with golden butterfly wings and chrome armor stands confidently with cables in each hand, set against a vibrant paint splatter background.
A retro anime style wolf girl with ginger hair, wolf ears, and a bushy tail sits on a moss-covered balcony railing with a playful expression, plants around, and buildings in the foggy background.
Corin Wickes (Zenless Zone Zero) XL/Ilustrious LoRa v1.0
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
Get inspirations

Made on Diffus

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

Hyper-realistic sci-fi portrait of a beautiful princess with glowing blue eyes, intricate blue crown and armor, set at night with a dark background
A dark sci-fi fantasy scene showing a giant black hole with spider-like appendages looming over a detailed fantasy village from a bird's-eye aerial perspective.
Close-up view of a highly detailed otherworldly creature with an alien-like translucent skull, illuminated by moody rim light against a dark background.
A surreal landscape featuring an ottoman-style caravanserai surrounded by an apple orchard in spring blossom, moss-covered stone steps leading through lush green grass alongside a clear stream with towering mountains in the background in the style of Hans Gude.
A girl with long flowing hair emerges from ocean water at sunset, illuminated by warm cinematic lighting with calm ocean waves around her.
A resolute female knight in golden armor and red cloak rides a dark horse with glowing eyes, set against a medieval army under a teal sky in comic style.
A close-up of a scary demon with its eyes and mouth sewed shut, glowing red eyes, set against a moody, grainy cinematic background with bokeh lighting.
Futuristic ocean colony on a coastal beach with a rocket ready for launch, illustrated under a vast blue and white space nebula and starry sky in WPA poster style.
A vintage car driving on a wet, narrow winding mountain road during a foggy and damp morning with a silhouette of a woman in a dark coat with wind-blown hair in the foreground, depicted in a cinematic style with film grain and bokeh effects.
Close-up portrait of an aged man with a white mustache wearing a vibrant red Mario cap against a black background, showcasing detailed wrinkles and skin texture under studio lighting.
Group of tiny birds crafted from clusters of green, purple, and red grapes perched on grapevine branches with delicate translucent wings and sunlight filtering through leaves.
Close-up portrait of a woman with medium-dark skin tone, wearing electric blue eyeshadow and bold purple lips, partially covered by a large golden-yellow leaf.
Close-up portrait of a tattooed woman wearing tinted sunglasses and multiple facial piercings, including a septum ring and lip ring, with green eyes and detailed makeup.
Portrait of a young woman with curly bright red hair and soft golden lighting, wearing a white translucent dress with a blurred green background.
A person wearing a white dress walking alone among smooth, rolling green hills under soft natural lighting.
Blonde woman in highly detailed white and gold power armor holding a large red spear, standing amidst a sci-fi battle scene with towers and armored soldiers.
Close-up portrait of a devil with curled horns and wrinkled skin, intently sniffing a vibrant red rose in low light.
A dark skeletal warrior dressed in spiked fantasy armor and a flowing red cape stands on rocky terrain beneath a large bright yellow sunrise with dramatic orange sky and clouds.
Black and white high contrast portrait of a macabre Nosferatu vampire with intricate, horn-like horns and dark surreal facial features in the style of Hieronymus Bosch.
A dark fantasy creature demon with pale skin, long pointed ears, sharp teeth screaming in side profile with muscular build and hooded cloak against a dark green smoky background.
An oak tree silhouetted against the sun with sunlight shining through the foliage, forming the outline of a woman's face in a conceptual, otherworldly scene.
Silhouette of a crowned figure wearing red armor and a cloak, standing under a glowing orange sky with a bright light source above.
Dark, moody d3press1on illustration featuring a surreal skull-like face with one yellow and one black eye, a wide distorted mouth filled with sharp nails, rendered in playful scribble style with triadic teal and orange hues on a geometric-gradient stained orangish background.
Portrait of a young woman with red hair tied in a loose ponytail, softly lit by warm sunlight with detailed freckles and natural makeup.
Close-up portrait of a young woman with pink hair, blue eyes, and freckles, featuring realistic skin texture and soft lighting.
Surreal digital painting of an intense bald mime artist with detailed joker makeup, crimson and violet streaks, on a dark purple and green textured background.
Photorealistic Troodon and donkey hybrid creature with a saddle, standing in a dilapidated post-apocalyptic urban environment, exhibiting detailed scales and feathers with vibrant orange eyes.
A fully clothed cybernetic young female with a black and white segmented suit standing in a surreal mechanical liminal space with intricate, chaotic organic and mechanical background forms.
A sleek, silver vintage sports car with orange rims parked on a cracked road under a dramatic sunset. The sun sets behind mountains casting an orange glow across the sky with dark clouds above.
Portrait of a young lady wearing an ornate, gold-embellished helmet with intricate designs, set in a misty forest with soft lighting and floral background.
Silhouette of a person with flowing hair wearing reflective sunglasses against a vibrant background of cool blues and warm oranges, with soft light and shadow interplay.
Two attractive women with ponytail hairstyles, one blonde and one brunette, dressed in sexy black office costumes with a futuristic cyberpunk vibe, posing against a shadowy blue gradient background.
Portrait of a bald female grey alien with pale white skin, black lips, and grey technology infused robes in pastel hues with sharp facial details.
A vibrant pointillism-style vector illustration showing business icons and graphs created with tiny glowing dots of complementary colors, featuring a shallow depth of field.
A young warrior with platinum blonde hair stands holding a curved steel blade, wearing a gray stitched cloth outfit with leather armor and a blue scarf.
Portrait of an androgynous figure in flowing silk robes under a twilight sky, surrounded by glowing moths with stained-glass wings and adorned with delicate golden chains.
A mystical librarian in flowing celestial robes holding an open book, standing between towering ancient bookshelves, with a cosmic nebula sky blending into the vast library background.
Surreal floating city constructed from towering blue-green crystal buildings above clouds at dawn, rendered in a dinkfsn style ink wash painting.
A mysterious gothic queen with pale skin, glowing fiery red eyes, wearing a detailed black armor and a dark crown emitting red fiery energy in an ethereal gray swirling background.
Close-up of a cyberpunk robotic face wearing a futuristic helmet with glowing red circuitry patterns and red illuminated eyes.

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