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

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.

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.

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.

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.

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.

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.

Flux Kontext Image Editor

Prompt-guided edits that keep character and style consistent.

AI Image Generator

Text to image with community models, styles and aspect ratios.

Explore the library

Models Built on Flux

Checkpoints and LoRAs across the Flux line, ready without a download.

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.

Anime style blonde girl with twin drills hairstyle, decorated with gemstone pins and ribbons, giving a thumbs up with a smiling expression.

A detailed dragon with metallic sheen and intricate pulsing red and blue ais-vesselz veins covering its body.

A woman with dark hair and a red headband wearing a red and white gingham mini dress and black biker boots, sitting on a concrete ledge at night against a textured urban wall with city lights in the background.

Four silhouetted chairs facing a fiery, burning landscape under a dramatic night sky filled with thick flaming smoke and intense glowing flames.

Two anime girls in a neon-lit urban train interior at night, one sitting and one standing, illuminated by glowing city lights outside the window.

A towering bioluminescent abomination called the shrieking hammerbuster with iridescent hide and glowing horns hunts colorful insects in a lush desert oasis on planet Quirklebrock IX under an alien sky.

Sepia-toned photo of a French girl in a leopard print dress sitting in a Paris cafe in the 1960s with her pet jaguar drinking coffee from a cup.

A steampunk-style woman scientist with black hair and green eyes wearing goggles and a leather apron, mixing green liquid in a glass flask in a vintage laboratory filled with glass bottles and equipment.

A beautiful ice sorceress wearing a neon blue crown and asymmetrical icy clothes, sitting on a throne of blue ice with a dark background.

Black and white night photo of the ancient colosseum showing its towering, half-ruined arches and intricate carvings illuminated by soft light beams through fog against a starry sky.

Get inspirations

Made on Diffus

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

A glowing amber egg containing a serene angel with white gold wings, floating in a dim cavern with warm golden light and detailed reflections.

A colossal mecha-golem covered in snow stands in a snowy mountain pass with two explorers at its feet, ancient runes faintly pulsing on its metallic body during golden hour.

Highly detailed insect sculpture with a large blue eye, ornate red and gold patterned cloak, and a textured earthy body standing against a natural background.

Macro shot of a flower with layered petals softly backlit by warm sunlight, featuring a realistic human eye embedded at its center with detailed iris and reflections against a dark background.

A female sorceress with flowing white hair and glowing blue eyes in a snowy forest, wearing intricate icy armor and a luminous crown, holding a bright ball of blue magic.

A celestial witch in a golden, mystical gown standing atop an ancient observatory adorned with glowing astronomical runes, holding an ethereal crescent moon staff.

Hyper-realistic colored pencil illustration of a solitary silver-gray wolf standing on a rocky outcrop with a full moon glowing behind it against a dark night sky.

Hyper-realistic colored pencil drawing of a colossal elephant standing in a misty rainforest, surrounded by lush green foliage and soft filtered light.

A futuristic portrait of a holographic glass angel robot adorned with a crystal-drenched siren headdress and glowing minimal white makeup on a plain white background.

Lavish Russian masquerade ball in an imperial palace featuring Empress Catherine descending a marble staircase amidst masked dancers in gold and scarlet costumes with ribbons and petals swirling under ornate chandeliers.

A post-apocalyptic figure in a blue trench coat and gas mask stands amid vibrant pink leaves, holding a large mysterious book and carrying a rugged backpack.

Hyperreal cinematic portrait of a woman wielding a glowing red neon scythe, dressed in a glossy black outfit with silver details under dramatic studio lighting against a white background.

Silhouette of a short-haired girl in a fitted outfit looking at a vivid sunset sky with colorful clouds, a large planet, and stars in the background.

Full-body figure wearing an orange hoodie and black jogger pants with a bored face emoji mask, standing sideways in a minimalistic open space with blurred figures in motion around.

A solitary red gothic church with a pointed steeple sits atop a rocky cliff surrounded by mist, with a snow-capped mountain glowing softly in the background at dusk.

Close-up of an African American man wearing sunglasses and a grey suit with a tie, standing outdoors with palm trees and a blue sky behind him.

Monochrome bust portrait of a skeletal figure wearing a plague doctor mask with a ribbed hose, framed by a metallic geometric halo, in cinematic lighting.

A digital carpet design featuring an abstract grid of colorful squares in shades of orange, white, gray, and black with a modern geometric pattern.

A dark whirlwind swirling in the twilight sky above a field of glowing star-shaped lights scattered in lush greenery under a moody, dramatic night sky.

Close-up side angle portrait of a person with vibrant orange pigtails tied with black bows, wearing a black turtleneck covering their lower face with a monster maw design, surrounded by colorful neon bokeh lights.

Close-up of a young woman with blue-green eyes wearing a pink hat decorated with vintage gold pocket watches, vibrant floral face paint, and glossy red lipstick.

A whimsical gothic skeletal doll with thread-like limbs kneeling, holding a pot with a vibrant red flower and a translucent butterfly perched on it, set against a blurred, dreamlike background.

Close-up portrait of a realistic cyborg girl with delicate red hair curls, striking blue eyes, and white ceramic robotic shoulder, featuring detailed mechanical parts.

Detailed digital illustration of a rhinoceros head with golden intricate patterns and a teal-green horn set against a dark brown background.

Portrait of a young woman in a black turtleneck with a double exposure blur effect and colored lights on her face, set against a plain light background.

Blurred motion portrait of a person wearing a white shirt against a red textured wall

Close-up of a futuristic space spirit girl with magenta hair and glowing fiery eyes, burning flame extending downward in a starry cosmic background.

A woman in vintage 1950s fashion with a white blouse and coral skirt reads a note outdoors under soft daylight, carrying a retro camera and canvas bag.

A silhouetted figure walks through a sprawling cityscape shrouded in dramatic chiaroscuro lighting and atmospheric clouds, rendered in deep grayscale and red earth tones.

Graceful Indian woman in a sparkling pink lehenga twirling outdoors in a wildflower field with a man dancing in the background under a clear blue sky.

Overhead photo of a young Japanese schoolgirl lying on a grimy concrete floor surrounded by old, bulky CRT televisions and tangled wires, evoking a dystopian and nostalgic atmosphere.

A monochrome illustration of a moth girl with large eye-patterned moth wings, extra eyes, pointy claws, sitting on a tree branch against a red and black contrasting background.

Macro photograph of a Baby's Breath flower stem with delicate white clusters against a soft bokeh background with teal and copper tones.

Oil painting of a mountain goat standing on a rocky cliff with a small waterfall, rendered in an impressionist style with visible brushstrokes and a dynamic angle.

Silhouette of a girl dancing wearing a white sundress and high heel sneakers against a yellow-themed abstract cityscape background.

Portrait of a woman with black hair styled in side buns wearing a tan military suit with gold buttons against a white background.

A serious man wearing a grey and white futuristic suit with a high collar, featuring black hair on one side and white hair on the other, in an 80s fantasy movie style.

Portrait of a woman with orange pixie cut wearing a long cream-colored dress looking at the viewer against a dark background.

Flux.2 Klein — FAQs

Try Klein Without Downloading It

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

$1 Trial
No GPU

watercolor portrait colorful hair

Product screen shoot