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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.

A girl rowing a small boat in a stormy sea with large waves and a swirling bright sky above, anime style
Cross Belt Blindfold | Illustrious Illustrious 2.0
A mystical forest guardian wearing ethereal white robes stands barefoot in a dark forest, her glowing blue antlers adorned with moss and vines, with shimmering eyes and cinematic lighting.
Eldritch Fantasy for Flux v1.2
Rhea/レア (Fire Emblem: Three Houses) SDXL LoRA | 5 Outfits [Illustrious] v1 (Illustrious)
zhongfenghuaStyle_FLUX_ Lora | 厚涂笔触_FLUX版_ Lora v1.0
Extreme close-up of a person with ashy skin wearing aviator goggles with colorful reptilian lenses, bright green lipstick, long black hair with vibrant green streaks, and blue ribbons, surrounded by neon bokeh light effects.
A pale-haired gothic sorceress clad in detailed black and gold armor wielding a rune-inscribed sword, standing on rocky terrain before a colossal obsidian dragon with glowing crimson eyes, set against a pink and purple ethereal sky.
A girl with folded ponytail wearing a white dress with Juliet sleeves and white strappy heels sits calmly on a wooden bench next to a fierce black dragon, illuminated by dappled sunlight filtering through surrounding foliage.
Nova Furry XL Illustrious v6B
Stormtrooper outfit v1
She-Venom (Illustrious) v1.0
Ant King Beru Solo Leveling IL / PD / XL-GMR Ant King Beru Pony-GMR
Fusor's Cute-sor Style II [Illustrious] v1.0
Get inspirations

Made on Diffus

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

A close-up of a molten gold eye embedded in a swirling fractal obsidian cosmic void, featuring hieroglyphic sigils on its iris, surrounded by dark crystalline ribbons and bioluminescent details.
A cyberpunk girl with white hair and red streaks wearing an exoshell suit and mask, squatting in a dark futuristic laboratory holding a glowing holographic butterfly with cables plugged into her back.
Dark-skinned female dragon girl with white hair, wearing tactical gear, gas mask, and backpack, standing in dusty ruins with torn cape and dragon tail.
A small chibi kodama wood spirit releasing a glowing Chinese lantern into the night sky over a photorealistic pond and meadow with many floating lanterns and bokeh lights.
Photo-realistic portrait of a woman with long wavy black hair and blue eyes, wearing a sheer light-colored top, shown from a profile camera angle with soft lighting and a beige background.
Double exposure portrait of Himiko Toga with silhouette and interstellar space opera theme, featuring cosmic landscapes and neuron-like space elements
Closeup silhouette portrait of a Japanese sci-fi warrior wearing an Anubis-style helmet with a dark outfit and flowing hair, standing in front of Egyptian pyramids and a glowing orange moon.
A warrior clad in ornate armor rides a dragon-like horse with large wings through raging flames and embers, escaping a fiery hell, rendered in a detailed, realistic fantasy art style.
A dark, moody watercolor-style illustration of a molecular structure viewed from a low angle, featuring interconnected transparent spheres with glowing lines on a blue gradient background.
A fantasy woman with pale skin and braided dark hair is embraced by a large menacing red creature with glowing yellow eyes and sharp teeth, set against a dark background.
A figure cloaked in shadow stands before a towering wooden gate engulfed in bright flames in an ancient, misty forest, surrounded by burning embers and charred trees.
Vibrant pop art portrait composed of ultra-fine parallel contour lines in electric pink, cyan, yellow, and magenta, flowing smoothly across the face and hair against a bright blue background.
A digital illustration of a mysterious figure wearing a dark hooded cloak with detailed gold patterns, glowing red eyes behind a metallic mask, holding a glowing orb.
A woman with long curly hair adorned with red roses, wearing a vintage white dress, standing against a dark stone wall in a moody atmosphere.
A slender bat girl with short hair, prominent bat ears, and large arm wings wearing a black outfit with neck tufts, set against a high contrast gray and pink background.
Two figures dressed in black streetwear stand facing an orange and red graffiti mural in a dark urban setting, one holding a knife.
A dark fantasy portrait of Yennefer of Vengerberg standing on a gothic balcony during a storm, featuring her in a black feathered gown with violet eyes and flowing raven-black hair.
A lone figure walks through tall, dry grass toward a large wrecked ship perched on an orange hillside with scattered ruins under a pale sky, rendered in Kibromoks art style.
Highly detailed cyberpunk portrait of a female android with short pink and purple hair, glowing red eyes, and intricate mechanical body parts against a white background.
Photorealistic humanoid robot completely covered in overlapping PG-13 sticky notes with only the metallic face exposed in a dark blue-lit server room.
Anime styled image of Tsunade from Naruto wearing a sleeveless shirt and pants, smiling and reaching out outdoors in a garden pathway.
Photorealistic portrait of a cat girl with long purple hair and animal ears lying on a bed with white sheets in a Valentine's bedroom setting.
A slim Japanese woman with long black hair wearing a floral print dress and an open cardigan sitting in a cozy cafe holding a coffee cup with warm detailed lighting.
Portrait of a Japanese style girl with brown hair wearing a brown ribbed turtleneck sweater and a pleated skirt, looking at the viewer with soft natural light and realistic shading.
A dark humanoid figure with a glowing red circular object for a head is running down a dimly lit hallway with speed lines emphasizing movement.
A fluffy chibi wolf 2D sketch howling at a large bright full moon in a photorealistic nighttime nature scene with rocks and forest.
A woman meditating peacefully at the river edge in a lush jungle surrounded by big green plants, vivid orange flowers, and colorful paradise birds flying above under soft ambient lighting.
A moss-covered supercomputer structure with glowing lights, situated in a lush green forest with tall trees and a mossy stone path, evoking a pristine Victorian science fantasy laboratory atmosphere.
A dimly lit still life featuring a cracked spellbook with parchment pages covered in runes, a human skull adorned with a pendant, a mechanical staff emitting violet energy, glowing arcane candles on brass holders, and steampunk goggles resting on another skull, set on a black velvet cloth.
A futuristic orc mercenary with rugged goggles and a lit cigar, wearing battle-worn armor against a vibrant psychedelic space background, painted in an oil painting style with visible brush strokes.
A sky-seer goblin with a large spherical helmet featuring three eye-like lenses stands on a rocky hill, casting warp-routes into a stormy sky filled with floating islands and glowing navigation orbs, rendered in a dark fantasy oil painting style with vibrant colors and punk aesthetics.
Portrait of Queen Nefertiti wearing a detailed blue and gold Nemes headdress and collar, illuminated by moonlight against a star-filled night sky over the Nile River delta.
Ultra-realistic digital portrait of a pale woman with a sharp boy cut and red glitter lipstick holding a transparent red orb, wearing an ornate black garment with floral embroidery under dramatic light bands.
Highly detailed nu disco and retro pop album cover featuring a white woman with elaborate futuristic accessories and intricate design elements on a vibrant pink background.
Cybernetic female portrait with glowing red eyes, intricate mechanical and geometric futuristic headpiece, illuminated by dynamic volumetric lighting in dark and red hues.
Vintage steam locomotive with black and red design emitting large plume of orange and gray smoke, traveling through a snow-covered mountainous region with snow-dusted trees.
Portrait of a woman with vivid red hair flowing dynamically, captivating blue eyes, and glossy red lips against a dark background with dramatic lighting.
Stylized angelicpunk elf female portrait with white feathers and colorful accents, rendered with niji iridescent style and volumetric lighting
Close-up digital portrait of a cyberpunk girl with neon yellow and purple hair, multiple tattoos and piercings, wearing a black leather jacket and fishnet top, with vibrant neon background.
A dark emperor wearing an ornate black porcelain mask cracked in half, detailed with elaborate silver embellishments and 16th-century style armor under dramatic lighting.

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