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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.

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.

Fire Human | Fantasy Fire Human | Ver 2.0
Close-up of a colorful layered dessert in a clear cup topped with whipped cream with a striped straw, set in a cozy restaurant interior with warm ambient lighting.
Close-up portrait of a girl with short black hair and green eyes wearing dark sunglasses, illuminated by warm golden hour light with high contrast and volumetric lighting effects.
Vixon's Illustrious Styles - Expressive Detailed Art illust
Valbun Style Illustrious
[SDXL]LuanFangHua | 乱芳华 | 国风大模型 v1.0
Ri-mix - [Illustrious + Anima] Bravo
A rat-like monster with red glowing eyes, sharp claws, and tattered leather wings wearing detailed dark fantasy armor standing on a log in a foggy forest.
Keij No.01
xa_gueuzav (xaxaxa) art style [illustrious-XL] v1.0
Melkor Mancin Style V4 [Illustrious-XL]
Anime-style girl with short dark hair and red eyes wearing a bike helmet, backpack, and pleated skirt, riding a bicycle on a crosswalk at sunset, looking back angrily.
Close-up of a glowing blue and purple crystal surrounded by moss on a wooden tavern table with warm low lighting and rustic wooden beams in the background.
Stylized illustration of a sulking girl with orange hair, deep blue eyes, wearing a chest harness and an o-ring collar, rendered in a partially colored painterly sketch style.
A blonde woman with very short curly hair wearing a light blue mini dress stands laughing joyfully with a dynamic pose against an abstract, glitch-patterned, dark background.
A girl with long black hair and red eyes sits confidently on an ornate chair holding a glowing red katana, dressed in a black floral kimono and high heel boots, set in a dark, chain-decorated room.
30-year-old woman in a bathroom wearing a pink towel wrapped around her head, white tank top, and patterned loose pajama pants, taking a night time selfie with a small smile
Side view of a blonde woman kneeling indoors wearing a floral kimono and thigh-high boots, holding a katana in a rustic wooden room.
Detailed vintage-style illustration featuring a skeletal figure with long hair, depicted in dark red, pale brown, and black hues, set at a Dutch angle.
Oil painting in impressionism style depicting a blonde woman in a white dress sitting on a patterned sofa with a calico cat resting on her lap, both characters showing emotional expressions.
Get inspirations

Made on Diffus

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

A Beastmaster clad in patchwork armor holds a staff topped with a glowing crystal, surrounded by various mechanical beasts in a dark fantasy forest clearing, illustrated in a vintage VHS animatronic style with vibrant colors and bold ink lines.
A digital painting of a teen cyborg girl with pale skin, long flowing red hair in a ponytail, blue eyes, and golden mechanical ribs, set against a dark blue background.
Hyper-realistic portrait of a teen cyborg girl with pink bob hair, blue eyes, and detailed mechanical joints wearing headphones.
Close-up of a young blonde woman with a messy bun eating steaming ramen noodles with chopsticks, set against neon green and teal blurred lights.
A side view digital artwork of a skeleton with shiny chrome-like bones, wearing a flowing black robe, crowned with a glowing golden spiked crown, against an emerald green pulsing background.
Extreme close-up of a massive hippopotamus with crimson-red glowing eyes, partially obscured by tall dry grass, standing by a riverbank with detailed, scarred skin illuminated by golden light.
Watercolor painting of a romantic coastal landscape featuring classical ruins on rocky cliffs bathed in golden light at sunset.
A realistic portrait of a girl with flowing white hair, striking blue eyes, and pale skin, set against a dark background with feathers and a shining gem detail on her clothing.
Lilith, a demoness queen with crimson hair and devil horns, stands in black leather armor facing a massive figure with fiery amber draconic wings in a rocky valley under a starry sky.
Side profile of a black-haired girl wearing a mechanical facemask connected with wires, against a vivid blue background.
Anime-style cyberpunk cyborg girl with blonde pixie cut and glowing green eyes wearing a shiny hologram halter dress, standing against a dark abstract background.
A screaming black-clad sorceress and a soldier preaching in a gospel church examining an intricate white arctic fox with gold and umber patterns and tree-like antlers.
Portrait of a woman with white hair and a glass-like transparent body, featuring digital glitch effects and blue graphical elements on a vivid red background.
Profile of a woman in a red dress with hair made of autumn leaves and delicate branches in a foggy forest
Silhouette of a young person with spiky hair standing on the edge of a rugged cliff, gazing over a vast sea of clouds under a gradient sunset sky from deep blue to orange.
Flat vector illustration of a mermaid with long blonde hair, golden eyes, and blue aquatic ears sitting in a wheelchair wearing an oversized white shirt, looking annoyed.
A knight skeleton with rusty armor and cracked skull leaning against cobblestone dungeon walls, broken sword on the floor, in a cinematic 80s fantasy style.
High-resolution portrait of a young woman with braided black hair and a black choker, illuminated by soft natural window light against a dark background.
A steampunk-inspired cyborg dragon girl crouching in a predatory pose on volcanic stones, with glowing amber eyes and intricate mechanical skeletal details.
Angular geometric humanoid robot with a boxy rectangular head, rough and chipped bright orange paint, glowing amber eye sensor, exposed wiring, standing in a gritty urban industrial setting.
A lone robed figure in mustard yellow with a horned headdress stands in a vast alien desert, gazing at a colossal crashed spacecraft with detailed mechanical panels and teal-green portholes.
Close-up portrait of a person's face with cracked pale skin, intense green eyes, dark smudged makeup, thin dark branches, and red ladybugs scattered across the face.
Monochrome ink-and-wash illustration of a crouching feminine character with oversized eyes and thin limbs, wearing a worn sundress and wide-brimmed hat, reaching for a small ball near a mangy stray cat, set against a warped cityscape silhouette with sharp angled buildings, dramatic high-contrast directional lighting, and deep shadows.
Oil painting of a 1930s European couple in Egon Schiele style. Woman with wide blue eyes and dark slicked-back hair pouts as man in dark suit playfully leans in to kiss her cheek, vibrant textured background.
Black-and-white illustration of a radiant biracial woman with a wide, joyful smile and curly hair holding two bowls of steaming soup, standing in front of a chalkboard filled with celestial orbits and mathematical equations.
Silhouette of a girl standing with a coat filled with watercolor stars and clouds, colorful smoke rising, and a minimalist gradient background.
Close-up black and white Sin City comic style portrait of a man's intense eyes glowing under rain with strong chiaroscuro lighting and ink textures.
High-contrast black and white close-up portrait of a woman with piercing eyes and dramatic shadows, rendered in a graphic novel style inspired by Frank Miller's Sin City.
A majestic high fantasy scene showing a sacred stone dueling platform carved atop a towering mountain peak, illuminated by golden sunrise light among misty clouds and distant jagged mountains.
Futuristic industrial structure with rusted metal surfaces and glowing orange interior lights against a misty teal sky, featuring silhouetted figures on precarious platforms connected by cables.
A black-and-white image of a crowned figure wearing a flowing black cloak and holding a spear, standing amidst swirling fog with a castle silhouette in the background.
A 1950s retro-styled female robot with harlequin elements fires a ray gun, wearing a metallic suit splattered with red, smiling against swirling glittering light trails.
A ligne claire style illustration of a man in a suit and a blond woman in a white summer dress holding hands at a metro train entrance, conveying a sense of longing in an urban New York setting.
Minimalist oil painting of a pale gothic 12-year-old vampire princess standing by a glowing medieval church window, illuminated by warm light in Rembrandt style.
A colorful skateboard on a concrete surface with surreal paint splashes and trails exploding from it under sunlight, casting a distinct shadow on the ground.
Close-up of a girl with detailed eyes, chewing gum and blowing a pink bubble, wearing an intricately patterned veil, against an abstract mandala background.
A blonde woman with long hair stands under a rainy bus shelter holding a bouquet of green flowers, dressed in a lace outfit with a blue and green color scheme.
Digital painting of a weary male survivor wearing a mustard-yellow hooded jacket with blue stripes, sitting on rubble in a desolate post-apocalyptic landscape with twisted leafless trees and flying crows.
Two adult midsummer sisters in antique white linen dresses, wearing botanical wreaths, embrace protectively in a shadowy green forest clearing with a porcelain doll and iron key on a mossy stone altar.
Detailed oil painting of an albino teen female cyberpunk pilot in a black flight suit standing before her large red and black mecha inside a dark spaceship, rendered in Rembrandt style.

Flux.2 Klein — FAQs

Try Klein Without Downloading It

And put it next to Flux.1, Qwen and SDXL on the same prompt.

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2,100+ Models

No GPU

Product screen shoot