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.

Digital portrait of a headless necromancer wearing ornate royal armor with a burning crown floating above where the head should be, flames forming ghostly expressions and molten gold dripping upward into the air.

Monochrome knight wearing heavy detailed armor covered in snowflakes, with one arm enveloped in vibrant blue magical spectral fire against a dark background.

Portrait of a young East Asian female with platinum blonde hair in a high ponytail tied with a red ribbon, wearing a layered cream and red outfit with armored gauntlets, standing against a textured rustic background in soft diffused lighting.

A colossal inverted floating pyramid with intricate alien architecture glows with blue light amid a dramatic stormy sky filled with lightning and towering clouds, while a lone figure stands on rocky terrain below.

A mysterious dark warrior cloaked in a tattered hooded cape stands amidst a storm with lightning illuminating the scene, faceless and eyeless with glowing eyes.

Realistic portrait of an elf girl with green eyes and blonde hair wearing a blue hat and dark cloak, with snow falling around her on a nighttime background.

A fantasy scene showing a woman in an ornate red hooded cloak and armor sitting beside a large realistic gray wolf in a misty forest, holding a basket of apples.

Photorealistic image of an albino girl with short wavy white hair and blue eyes, surrounded by large blue peony flowers with glowing floating petals and dynamic blue ribbons under a night glowing sky with blurred lights.

A solitary silhouetted figure stands in a surreal digital dreamscape, surrounded by vibrant layered mountain formations under a dramatic swirling sky.

High-detail digital artwork of a cybernetic girl with blue hair and reflective robotic armor sitting on the ground with a sword behind her, shown from above.

A mechanized woman dressed as a nun with black and white cornette, red glowing eyes, intricate robotic details, long flowing hair, and a red cross on her chest.

Close-up oil painting of an angelic young girl with delicate lace and roses, rendered in hyper-realistic Rembrandt lighting against a black background.

A determined girl wearing a white hooded cloak crouches in a narrow alley holding a sword illuminating the ground with dramatic sunlight, painted in a traditional style.

Young Ukrainian peasant woman smiling joyfully in a sunlit field wearing a traditional embroidered dress with red floral patterns and a woven floral wreath in her braided hair.

Black and white portrait of a woman wearing a detailed silver headpiece, necklaces, and a sheer black veil, with dark makeup and nails, posing thoughtfully.

A small gnome sleeping peacefully in a detailed forged carbon boat floating on a magical enchanted pond surrounded by glowing magic particles and mystical forest.

A tall, slender girl with large yellow eyes and black cat-like ears stands in the center of a street lined with plush-like buildings and various paper people figures. The sky is an intense red-orange gradient, and the scene evokes eerie surrealism and emotional tension in a dreamlike graphic novel style.

A weathered concrete dam spans a rocky canyon with dense evergreen forests and large glowing organic masses in the foreground, seen from a high angle.

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.

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