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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.

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
Ethereal Glow Flux v2 (Epchs 20)
All Disney Princess (Illustrious) Illustrious
An anatomical chart illustrating a great horned owl as a surveillance drone, showing half natural feathers and half robotic machinery with wires, processors, and sensors.
posILustrij v1.0
A tall winged figure in a blue dress adorned with swirling colorful abstract patterns stands against a dark background with artistic splashes and tiny curious characters at her feet.
Sheer Tights (pantyhose) v1.0
White-haired girl with blue eyes sitting on a subway bench with an abstract background filled with many blue eyes.
A glamorous woman in a deep red sequin dress performing with a vintage microphone on a stage with a grand piano and dramatic lighting in a retro nightclub setting.
Aka6 [Illustrious] Style LyCORIS v1.0
A cat girl character with black hair, green eyes, round rimless glasses, cat ears, and tail, wearing an off-shoulder green sweater, kneeling barefoot.
Somman v1.0
Get inspirations

Made on Diffus

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

Dimly lit wooden room with an open magic book on a wooden table displaying a fantasy world with trees, mountains, streams, and glowing mist rising from its pages.
Digital artwork depicting a futuristic cityscape at night with a deep blue sky, a winding bridge over a river, distant factories emitting smoke, and illuminated urban buildings.
Minimalistic monochromatic charcoal sketch of a woman in profile with abstract black brush strokes and elegant simplicity.
Ethereal landscape featuring a flowing river under a crescent moon and starry night sky, with golden trees along rocky banks.
A sexy nurse in a short white coat and high heels stands close to a male doctor in a white coat, both illuminated by moody blue lighting and shadows in a minimalist medical office.
Woman wearing a black latex costume with a golden scorpion design, kneeling on a rooftop ledge at night with city lights blurred in the background.
A futuristic scene on a high bridge inside a large spaceport with a woman in a flowing dark dress standing alongside two captains near spaceships and industrial equipment.
Highly detailed fantasy concept art depicting an ancient warrior sitting on a defeated mythical creature under a large glowing moon, rendered in Moebius art style with dramatic lighting.
A tall female figure with long blonde hair in golden ornate armor, illuminated by ambient and dramatic lighting, surrounded by golden clouds.
A vivid portrait painting of a woman with flowing yellow hair against a dark black background, her face animated with a dynamic and lively expression.
A cinematic portrait of a young woman with light brown hair wearing a black polka-dot dress with spaghetti straps, standing outdoors in soft natural lighting with a moody aesthetic.
Scenic Scandinavian lake surrounded by dense forest under a vibrant orange sunset sky, with clouds reflected in the water and mountains in the background.
Close-up illustration of a feminine figure wearing a split black and white hanya mask with oni horns, glowing eyes, and smoke emitting from her lips in neon blue outlines.
Hyper-realistic oil painting of a young angel in prayer, with large detailed wings illuminated by golden heavenly light, in the style of Rembrandt.
A delicate teen duchess with bare shoulders, styled in a vintage oil painting technique reminiscent of Rembrandt, with red flowers in her hair and a floral necklace.
A large mechanical spider with glowing green lights and robotic legs covered in moss stands in the center of an abandoned, ruined theater with broken seats and cracked floors enveloped in fog.
Close-up forced perspective profile of a goth woman wearing a sky blue beret, with pale skin, dramatic blue eye makeup, and vibrant pink glossy lips.
A futuristic metropolis with towering, honeycomb-inspired skyscrapers featuring angular metallic structures illuminated by warm lights and fiber-optic patterns, with clouds of electric vapor surrounding the spires.
Hyper-detailed futuristic space elevator towering over a high-tech coastal city at twilight, featuring floating vehicles and glowing neon lights.
A minimalist dark cube floating above a foggy landscape with a solitary silhouetted figure underneath illuminated by flowing light beams. A vertical strip of bright orange and blue light contrasts the monochrome surroundings.
Monochrome dark fantasy scene of a cloaked witch with flowing black hair holding a dagger, standing beside a mythical animal adorned with glowing magical sigils, set against a large glowing moon and a dilapidated temple background.
A Chinese woman in elegant white Hanfu with ornate golden headdress reading a red book amidst ancient architecture and red blossoms.
A photorealistic surreal scene of a giant white octopus with strange scales and tentacles on a tanker deck surrounded by silhouetted fishermen under green lighting and sunshine.
Digital painting of a mystical woman with a golden halo, dark cloak, and intricate golden geometric patterns surrounded by flying black birds against a muted brown background.
Overhead view of soft, rolling sand dunes in a vast Scandinavian desert under a warm orange sunset sky with birds soaring above, illustrated in anime style.
Realistic drawing of a woman with short curly hair standing in a kitchen feeding a black and white cat rubbing against her leg.
Hyper-realistic close-up of woman wearing a shimmering copper and turquoise avant-garde mask with an exotic hibiscus flower, against a deep teal background.
Closeup oil-painted portrait of a teen elf girl with long white hair and bright blue eyes, wearing a futuristic black corseted dress in a dark space ship, illuminated by Rembrandt lighting.
A thorn-crowned figure stands regally on a pedestal wrapped in symbiotic thorny lattice and carbon-fiber throne, bathed in volumetric god rays piercing through smoky, rain-drenched urban ruins.
Wet urban alleyway illuminated by neon lights, featuring a humanoid android with a CRT monitor head displaying a cyan emoticon, wearing an orange poncho, interacting with a ginger tabby cat in a black harness.
Close-up of a mysterious figure wearing a textured ninja-style mask with red and white vertical stripes, against a blurry whirlpool background with glittering bokeh lights.
Portrait of a French-Senegalese woman with glowing dark skin and a gold pigment smudge on her cheek, dressed in an off-the-shoulder ivory top, holding a paintbrush in a sunlit Parisian atelier with jewel-toned silks in the background.
A lone figure stands amid towering futuristic solar sail structures with neon-lit panels under a red sky with two moons in a barren desert wasteland.
Dystopian desert scene with towering retro-futuristic solar sails accented by neon lights under a red sun and cloudy sky, featuring a lone figure and modern sports cars.
A dark-robed traveler stands before a massive stone portal shaped like a keyhole, set within a dense, ancient jungle illuminated by bioluminescent mushrooms, with a glowing path leading to snow-covered mountains visible through the portal.
Black and white photo of a glass bottle shaped like a skull, filled with milk, with milk dripping and splashing on a cracked surface against a dark background.
A surreal painting of a fragile young man with short white hair, wearing a black hood and face mask, revealing glowing eyes, with dark mist and shadowy figures in the background.
A cybernetic Virgin Mary depicted as a detailed cyborg with mechanical parts and a digital halo, dressed in flowing blue and white robes, standing amidst clouds with children nearby.
Vibrant pop art illustration of a stylish young woman wearing a light green baseball cap and neon yellow round sunglasses, drinking dark soda through a straw against a hot pink background.
A female warrior with silver hair in traditional armor holding a katana in an action pose, set against a vivid red background with cherry blossoms.

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