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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.

Toadette (Super Mario) - [Anima/IL] Illustrious
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.
Get inspirations

Made on Diffus

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

Side-profile digital artwork of a dazzling cyberpunk hummingbird perched on a branch, featuring vibrant iridescent feathers in emerald teal, hot pink, and molten gold against a deep black background with electric blue and magenta rim glows.
Hyper-realistic painting of a young albino girl with long white hair and glowing blue eyes wearing a black mech suit in a dark cyberpunk style, inspired by Rembrandt.
Brushwork painting of a cute 20 year old girl with purple eyes, dark hair adorned with colorful flowers, touching her face gently with both hands.
Detailed dark portrait of a bearded man with heavily wrinkled and textured skin, intense gaze, and dramatic shadows emphasizing facial details.
A fierce fantasy scene featuring a woman in an ornate golden mask and dark cloak alongside a snarling werewolf with glowing red eyes under a stormy sky.
A mythical warrior stands on a jagged fractal cliff wearing a cloak of glitching brushstroke feathers, facing a vibrant spiraling vortex in a surreal fantasy landscape.
A photorealistic futuristic owl robot perched atop a cyberpunk cityscape at twilight, featuring intricate chrome feathers and yellow glowing neon eyes.
Black and white photo of a male clown in traditional black costume and white face paint, wearing a bowler hat and smoking a cigarette beside a striped circus tent.
A vibrant ethereal sky garden with floating islands covered in lush greenery and colorful trees, cascading waterfalls, and a vivid sunset sky with swirling clouds.
A gothic dark fantasy woman with pale skin and glowing golden eyes, wearing black lace and leather adorned with blue jeweled ornaments, holding a smoking human skull.
Pale skeletal figures with stone-like skin emerging from choppy dark water, wearing tattered cloaks, set against a misty, overcast sky with a derelict ship silhouette.
Portrait of a model with liquid-metal petals resembling chrome orchids blooming from her neckline, wearing a reflective mercury-fabric top, with violet haze makeup and a cerulean vapor background.
A surreal cyclops monster with a long neck and a single large red eye, covered with long blue and orange hair, sitting with moss-covered legs in a small village at sunset, reaching out with an outstretched arm.
Profile portrait of a woman with black hair in a bun wearing a transparent mask helmet against a vibrant orange background, featuring Japanese text and cyber fashion elements.
Side profile view of a realistic female android with detailed mechanical parts against a solid purple background.
A stylish young Korean woman with dark asymmetric shoulder-length hair and red lips wearing a white off-shoulder dress with gold geometric patterns, orange tinted glasses, and an orange spiraling halo behind her head against a dark teal background.
A cyclist wearing an orange and white jersey intensely racing on a vintage orange road bike in a bold comic book style, set against a rural landscape with hay bales and spectators.
A young woman with long flowing brown hair walks away wearing a white shirt, blue jeans, and a tan backpack, beneath a vast sky filled with fluffy cumulus clouds.
A young woman with long, wavy brown hair stands wearing a strapless floral grey dress with black ribbon accents in a lush mountainous field with white wildflowers under cloudy skies.
A massive demonic warrior in ornate spiked plate armor stands on a jagged cliff, wings tattered and spread, holding a heavy serrated blade, silhouetted against a glowing celestial ring and crimson background with gritty texture.
Mysterious armored warrior wearing Hello Kitty-themed armor and an upside-down pot helmet, roasting a large piece of mutton over a campfire next to a plush Hello Kitty companion.
A female android with bright pink hair ice skates gracefully on a rooftop rink in a neon-lit cyberpunk city, wearing a white futuristic outfit with cybernetic limbs glowing blue.
Stylized black cat with multicolored eyes holding a pink beverage against a vibrant abstract geometric background.
Silhouette of a cyberpunk woman with biomechanical limbs and dress walking through a wheat field at red neon sunset.
Abstracted woman's face made of sharp geometric planes with striking crimson lips, set against muted ochre and blue tones in a style mixing impressionistic brushwork and angular features.
Dramatic black and white profile portrait of an elderly man with white hair wearing a black turtleneck, against a plain gradient background with side lighting.
A surrealist oil painting of a classic orange 1970s muscle car submerged in a milk-like ocean with orange fish swimming around and a sky filled with giant red and white lollipops, painted with smooth blending and soft diffused lighting.
A hyperdetailed illustration of a handsome black man with dark skin in tactical gear, wearing a grey armored vest, black gloves, black half-face mask, holding two pistols pointed forward, against a white background.
Black and white close-up portrait of a young woman with detailed facial features, glossy lips, and wavy hair, designed as a pop album cover for artist MUSAIC.
Hyperrealistic portrait of an unclean angel with shattered black and cobalt blue glass halo floating above her head, framed by translucent bioluminescent wings glowing with pink and purple hues, wearing a molten glass garment under cyan and magenta studio lights.
Portrait of a beautiful demonic woman with pale blue glowing skin and digital glitch effects, wearing a celestial cross necklace and earrings, with a background of analog interference.
A haunting analog horror portrait of a demonic woman rendered in deep electric blue and black tones, with glowing eyes and film grain textures.
A humanoid robot with glowing red eyes kneeling in water with reflective surface, set against a colorful graffiti wall backdrop.
Photorealistic image of a dog with playful expression wearing Pteranodon wings, shown in dynamic pose under cinematic lighting.
Silhouette of a man walking a dog on a pier with a ship visible in the background against a setting sun.
A futuristic figure wearing a metallic silver trench coat and black helmet stands under volumetric lighting with neon bracelets glowing against a dark background.
Close-up of a grief-stricken elven warrior with emerald-green eyes and silver hair, clutching a broken ornate sword against her forehead under dramatic sunset light.
Catwoman in sleek black latex catsuit behind rusted bars of a worn prison cell, holding a sparkling diamond with a confident smirk.
A fantasy landscape featuring towering cliffs covered in greenery, shrouded in morning mist under a dramatic sky painted in renaissance oil style with visible impasto brushstrokes.

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