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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.

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
Link from the legend of Zelda BOTW [FLUX DEV] v1.0
A stylized white-haired girl with green eyes wearing a dark green overcoat stands in a snowy village at night with falling snow and illuminated lampposts.
Close-up portrait of a girl with long black hime-cut hair and red eyes drinking blood from a blood bag using a straw, dressed in a white coat and black shirt with a red necktie, set against a dimly lit dark background with soft shadows.
Quaintly Chaotic Comtesse FINAL
AyamiKojima Style v1.0
Anime Art-Style Anime_Retro
A detailed landscape painting forming a face silhouette with a snow-capped mountain ridge, an alpine lake reflecting dawn light on the left, and a shadowed pine forest with a chapel clearing on the right.
Get inspirations

Made on Diffus

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

A fantasy landscape featuring elegant elven-style pavilions with moss-covered roofs suspended over a calm canyon river surrounded by tall cliffs and blooming pink trees at twilight.
Portrait of Amane Kanata with blue hair, glowing neon flower on chest, and psychedelic luminous accents on dark background
A lone traveler stands at the base of a towering black monolith covered in glowing blue inscriptions in an alien desert of deep purple sand under a stormy sky with lightning.
Emo woman with black hair and blue eyes wearing a black oversized sweater featuring a skull design, ripped black leggings, and shiny black platform shoes, posed dynamically on the floor with dark makeup and red lips.
A neo-noir style ethereal portrait featuring a person silhouetted by venetian blind shadows, with cigarette smoke tendrils illuminated by neon rim light and film grain effects.
A fantasy digital painting of a large blue castle perched on a rocky cliff surrounded by steep cliffs and rock formations, illuminated by warm sunset light with a mysterious figure standing on a nearby ledge.
A silhouette of a solitary figure in a dark, fog-filled room illuminated by soft volumetric light through an architectural window frame, evoking isolated emotion.
A highly detailed sand traveler dressed in tattered robes and a red keffiyeh stands on a cliff on an alien desert planet with multiple moons in the sky, holding an ornate staff.
Vibrantly colored illustration of a girl shouting and playing guitar with vivid neon splashes and colored shadows
Girl sitting wearing a white dress with a hood featuring cat ears, white pantyhose, dark blue frilly socks, and large black platform shoes
A young blonde woman in a floral vintage apron stands in a softly lit 1950s-style kitchen with a freshly baked pie on the wooden counter.
A skeleton wearing patched overalls and a wide sunhat gently waters glowing flowers growing among moss-covered tombstones in a peaceful graveyard at sunset.
Fantasy scene of two elves resting under a large sacred tree at sunset with glowing lanterns, vibrant flowers, and a starry sky filled with magical stars.
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.
A serene white swan gracefully floats on a misty lake bathed in soft golden light with reflective water and a blurred dark background.
A woman-fairy hybrid seated with translucent cyan-veined wings and a flowing blue dress, reflected in a mirrored surface against a dynamic deep indigo and cyan abstract background.
Close-up portrait of a woman with dark chocolate skin, white hair, grey eyes, white lipstick and nails, wet skin, set against a black background.
Close-up portrait of a redhead woman with blue eyes and dramatic lighting, featuring a flamboyant hairstyle and sun tanned skin against a blurred dark background.
A detailed oil painting of a sinister creature wearing a cracked, blue and white mask with black liquid oozing through fissures, dressed in a sporty tracksuit against an orange abstract background.
Digital artwork showing a split image of an oriental female angel with platinum hair and white gown on one side, and as a fallen angel with black hair and black bodysuit on the other.
A detailed gryphon creature perched on a moss-covered forest branch, wings spread wide, with sharp talons and glowing orange eyes in a misty woodland.
Colossal sci-fi white towers standing tall on a pristine snowy field under a dark blue evening sky, with soft blue lights and light falling snow.
A woman in an elegant orange dress stands on rocky terrain near a large tree, overlooking a deep canyon with a waterfall and lush greenery under a bright sky.
A photo realistic painting of a gigantic prehistoric skeleton lying in a desert at sunset with a woman standing between its ribs, casting long shadows under dramatic, warm light.
Detailed depiction of a golden Aries astrological symbol featuring an ornate Victorian-style spiritual figure with elaborate armor and flowing elements on a black background.
A dark post-apocalyptic wasteland under a grey sky featuring a large, brutalist tower with a skull embedded, surrounded by rocky desolation.
A neon-haired anime girl with pastel pink and blue hair, wearing a shiny yellow and blue retro-futuristic jacket, posed against a dark sky blue gradient background.
A cyberpunk woman with long white hair wearing a black off-shoulder corset dress, white stockings, and black high heels standing with flowing skirt against a blue gradient background.
A girl with long light blue braided hair wearing a pastel pink frilly dress with lace and ribbon accents, thigh-high stockings, and platform heels stands against a vivid pink cloud backdrop.
Detailed digital portrait of a fox character wearing a sleek helmet with glowing red eyes, adorned in dark clothing and layered jewelry, set against a vibrant red background.
Anime girl Ninomae Ina'nis with an elongated body, blunt bangs, a halo, purple cat paws, and a dark abstract background
Stylized image of a girl with a thick braid, wearing a deep blue cropped bomber jacket over a burnt orange dress, knee-high boots, and fingerless gloves, illuminated by warm sunlight.
Silhouette of a person standing with a bicycle under a huge luminous eclipse in a dark, monochromatic night sky with clouds.
A photorealistic image of a jaguar lying on a large tree branch in the African savannah during a golden sunset with a big round sun in the background.
A woman in a flowing white dress dances barefoot on a giant piano keyboard surrounded by swirling floating sheet music under a bright blue sky.
Minimalist pencil caricature on cream-toned sketchbook paper showing a forlorn stick figure with slumped posture and teardrop, standing under a speech bubble with handwritten text about AI tool outages.
Female anime retro style warrior holding a katana sword, wearing sheer tights and glossy black shorts under pink and blue surreal iridescent lighting.
A slender cyborg girl with a robotic arm stands in a dynamic pose wearing fluffy slippers, a loose pajama shirt, and mini shorts against a warm, abstract sleepy background.
A tall slim girl with short black fluffy hair, red eyes, black bunny ears and tail, wearing a white long tunic with a red cross, standing angrily on a glowing red floor in a dark setting.
Dark fantasy scene of a glowing-eyed girl with horns and striped pantyhose standing confidently before a giant monstrous creature adorned with skulls and glowing eyes, surrounded by lightning and smaller skull-faced creatures.

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