Diffus
Get started
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.

0/4
Images generated on Diffus
Behance logoGoogle logoCanva logoSquarespace logoAmazon logo
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.

Ariel (The Little Mermaid) Disney Princess - | Illustrious XL | XL PONY | SD 1.5 - by YeiyeiArt Ariel PONY XL V.
Close-up selfie of a woman wearing makeup in natural lighting with mountains and a sunset in the background
Vixon's Cute Styles - colourcore colourcore v1.0
Close-up portrait of a grimdark sci-fi figure wearing a heavily detailed gas mask with glowing green circular lenses, covered in religious symbols and tangled wires, holding a glowing mechanical relic cube.
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
Get inspirations

Made on Diffus

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

Hyper realistic bizarre creature with a monstrous face and mechanical legs, set against a desert landscape under a bright blue sky.
Highly detailed hyper realistic portrait of a young woman closely beside a wolf with dramatic cinematic lighting and atmospheric haze in a dark, faded color palette.
Black and white portrait of a young woman with curly hair, subtle freckles, and an intricate floral tattoo on her shoulder, against a detailed floral line art background.
A panoramic wide-angle view of a highly detailed otherworldly landscape featuring a winding river, twisted rock formations, and a large glowing sun beneath dark, heavy clouds.
A dramatic celestial battle showing armored warriors wielding spears on rocky terrain facing glowing angels with majestic wings against a backdrop of dark storm clouds and divine light beams.
A vibrant pop art style portrait of a woman with vivid purple skin, bright red flowing hair, and a highly reflective chrome metallic hand raised near her face against a solid black background.
Digital painting of a dark-skinned man with a serene, contemplative expression, set against a white background with a bold vertical jagged orange stripe.
A young woman in a futuristic metallic bodysuit titled Celestine Veil, surrounded by dynamic iridescent lines on a bright yellow gradient background.
A giant girl wearing a floral skirt and crown, holding a Super Mario-style bomb, stands smiling crazily above a construction site with a large explosion below, rendered in pastel vaporwave and mixed media style.
A tired knight in full-plate armor and fur cloak sits against a giant rotten tree in a rainy forest, reflecting in a pool of water.
Portrait of a smiling blonde girl with blue eyes wearing intricately carved medieval armor, standing outdoors with a distant castle and intense sunlight.
Anime-style illustration of a female samurai with long silver hair wearing a white kimono with red embroidery, sitting on a stone in front of a traditional Japanese temple with stone steps and red torii gates, surrounded by green grass and flowers.
Close-up of a woman's face with a glowing jellyfish diagram near the eye and orange coral-like light patterns, set against a stormy sea background with soft lighting.
A cyberpunk female warrior with red glowing eyes, a neon halo behind her head, wearing a sleek dark outfit and holding a katana in a futuristic city setting.
Close-up portrait of a tattooed woman illuminated by purple and pink neon light, holding a katana handle with Japanese characters wrapped in dark fabric.
Side view of a mature gothic elemental figure seated alone at a table in a dark steampunk Victorian lunatic asylum, adorned with bejeweled accessories and large intricate orange plasma wings, rendered in black-toned Cubism style with detailed Zentangle patterns.
A zombie-like old man with a ragged coat and shovel stands in a foggy churchyard in front of a freshly opened grave, under a full moon with a gnarled tree behind.
A traditional East Asian woman dressed in elaborate Tang dynasty attire plays a pipa amidst an ethereal rocky landscape with a glowing golden halo behind her head.
A cyborg woman with her robotic faceplate removed, revealing detailed circuit boards, motherboards, and electronic components beneath, illuminated by purple light.
Oil painting landscape with tall trees, rocky trail, mountain, lake, and a dramatic cloud formation in the sky, inspired by Albert Bierstadt.
A serene elven sorceress in detailed golden armor and flowing cape stands in a shimmering lake surrounded by a misty, dark forest.
Abstract cat portrait with colorful patches and blue eyes in the style of Christopher Wool on a minimalist beige background
A silver-haired elven girl with cyberpunk implants wearing a red and gold traditional Chinese qipao stands gracefully in a misty bamboo forest with bioluminescent mushrooms and sakura petals drifting around.
A figure with red skin and black horns standing in rain surrounded by glowing yellow and white flowers floating on water with vivid reflections.
A young female with flowing white hair composed of twisting, amorphous shapes resembling an eldritch abomination, wearing an elaborate white dress with ruffles and a corset, set against a dark, surreal background featuring mechanical and organic elements.
A robed cultist prays at an ancient obelisk emitting a pillar of light in a dark fantasy apocalyptic landscape with vibrant colors and bold ink lines.
Close-up of a cyberpunk character with striking blue eyes, black hair with blunt bangs, wearing an intricately designed metallic mask and holding a metallic fan and sword.
Close-up portrait of a female character with pale cracked porcelain skin and a glowing red cybernetic eye on the left, dark wet hair, intense natural right eye, wearing a high-collared white garment and red earrings.
Hyper-realistic close-up portrait of a futuristic woman wearing red sunglasses with neon red eyes, black short hair, dark makeup, and glitch art elements on a dark green background.
A young woman with closed eyes, tears streaked down her face, surrounded by vibrant orange roses and glowing fireflies amid a foggy, moody setting with dramatic orange and blue lighting.
A detailed digital illustration of a surreal woman with vivid blue skin, bright yellow-green eyes, red lips, and orange nails. Multiple cracked, dripping eyeballs float above her dark hair against a dark, abstract background.
A photorealistic digital artwork of a serene woman with eyes closed, illuminated by warm light, lying against a vibrant green glowing grid background.
Hyper-realistic cinematic portrait of a one-eyed cyclope creature with dramatic lighting, grainy texture, and shallow depth of field.
Portrait of a 23-year-old tattooed woman with black and auburn two-tone long hair, glowing floral tattoos, wearing a black see-through dress in soft afternoon lighting.
Oil painting style image of Mount Fuji erupting with vibrant smoke plumes and contrails in the sky, two girl silhouettes standing in foreground with small hearts above them.
Close-up portrait of a sad teen princess with red curly hair, blue eyes, pale skin, and a silver crown, depicted with Rembrandt lighting.
Dark-skinned female character with yellow eyes and long orange hair, wearing a shiny black latex bodysuit and a white headband, set against a bright outdoor forest and blue sky background.
Close-up artistic portrait of a woman with pale skin and dark hair facing forward next to an owl, both showing intense, expressive eyes.
A detailed metallic humanoid cybernetic sentinel with reflective surfaces and intricate mechanical parts, surrounded by floating cosmic spheres and birds.
Hyper-realistic steampunk airship adorned with rococo gold embellishments floats majestically through a dramatic stormy sky with dark clouds and lightning over a rugged alien coastline.

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