Diffus
Get started
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
Behance logoGoogle logoCanva logoSquarespace logoAmazon logo
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.

ComicSimp v1.0
Vixon's Pony Styles - Kehoe v1.0 Kehoe v1.0
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
Get inspirations

Made on Diffus

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

A chibi wendigo holding a glowing skull engulfed in purple fire sits beneath a ghostly forest tree with glowing yellow eyes in a misty, spirit-filled forest.
Highly detailed astronaut in a realistic oil painting style, standing on a rocky alien desert landscape with a large glowing orange planet and smaller celestial bodies in the background.
A bearded adventurer wearing round glasses and a weathered fedora sits on cracked terrain beside a swirling white lava river under a dramatic teal and gray sky in a desolate landscape with twisted dead trees.
A gothic-styled girl with pale skin, long gray hair, and black horns stands in a misty dark forest at night holding a curved sickle. She wears a detailed white double-breasted school uniform with red ribbons and thigh-high stockings, illuminated by dramatic lighting from below.
A fantasy canyon at twilight with luminous elven architecture, arched bridges, glowing pavilions, lush pink and green vegetation, and a reflective river filled with lily pads.
A radiant field featuring a colossal tree with yellow and pink leaves emitting vibrant rainbow-colored magic arcs into a colorful sky with expressive brushstrokes, under a moonlit mountain landscape.
A towering, city-sized floating library with ancient wooden shelves filled with giant books, framed by a glowing celestial sky featuring planets and constellations, overlooking a serene lake with a sailing ship at sunset.
Hyper-realistic digital painting of an alien spaceport set within a spectacular canyon landscape at sunset, featuring futuristic landing platforms, bizarre alien flora, and a Sith figure overlooking the scene.
A monochromatic sepia-toned scene with a large cracked circular structure suspended behind a solitary figure standing on a fragile platform.
Fashion portrait of a figure with a black, featureless Vantablack-like face cracked down the middle, holding a detailed Japanese Oni mask, wearing a patterned top with diagonal black and white designs, set against a softly textured white and gray background.
Close-up of a person wearing glowing headphones with a vivid reflection of 90s video games and childhood cartoons in the visor, bathed in warm golden and cool blue light.
A mystical model wearing a black flowing dress with large iridescent blue raven wings, and a dark antler crown, standing amid mist on a black background.
A kawaii revenge-themed rabbit character wearing a red jacket, with large black eyes and small fangs, standing against a dark textured background with red splatters.
A cosmic silhouette of a woman standing on a planet surface with flowing, glowing celestial light spreading behind her, set against a dark space background.
Highly detailed cyberpunk robotic woman portrait with metallic textured skin and colorful abstract spikes emerging from the head.
A dark, cyberpunk-inspired futuristic woman with a cracked, glowing digital halo radiating behind her, featuring intricate and abstract fractured patterns.
Expressive dark fantasy painting of female archangel Uriel with copper hair, glowing blue eyes, powerful wings, standing in a post-apocalyptic industrial sea environment with dramatic lighting.
A vintage woodblock print depicting a mystical mountain landscape at night with an ancient oak tree on the left, a winding stream flowing through golden grass, towering craggy mountains in the background, a luminous full moon, and dense cream-colored clouds against a dark, starry sky.
Close-up photorealistic profile portrait of a dark elf female with deep charcoal-black skin, glowing blind white eyes, messy white ponytail, and intricate cybernetic Victorian-style filigree port and glowing circuitry.
A surreal sci-fi scene featuring sleek futuristic spacecraft flying near tall mist-covered cliffs overlooking ocean waves, with lush greenery and dramatic coastline under a cloudy sky.
A dark, photorealistic forest scene at night with colorful glowing berries beside a small pond reflecting the moon. A hand-painted 2D chibi creature resembling a fox with a tribal mask sits next to the water.
Melancholic Viking warrior girl with long blond hair and leather armor sits alone on a snow-dusted stone balcony overlooking a stormy sea under a cloud-obscured full moon.
Monochromatic surreal portrait of an ethereal woman with pale skin and black hair, set against a broken circular glass background, featuring detailed expressive eyes and a dark grunge style.
Cheerful anime girl with bright red horns and short red hair, dressed in a black and gold outfit, raising her arm in celebration during a 2026 festival amidst a city crowd.
Light-toned painting of two mythic, frowning 1970s courtesans in white dresses sitting on branches of a bare dead tree in a yellow field under a calm sky.
Digital illustration of a wire-frame portrait of a woman's face and neck with glowing white textured lines over dark background, serene expression with closed eyes, spiky hair, and dark lips.
A surreal portrait of a figure with a fully bandaged face surrounded by fluttering deep blue butterflies and enveloped in dark fog, featuring a mystical and dreamlike atmosphere.
A menacing cyberpunk skeleton figure wearing a hood and mechanical armor with glowing red eyes stands before a neon-lit hexagonal window revealing a futuristic cityscape with tall towers and lightning-filled purple sky.
A photorealistic and idyllic quayside scene with rustic houses, glowing tulips and carnations in pots, a white swan swimming in turquoise water, sunlight sparkling on the canal, and a bright blue sky with clouds.
Female warrior with red hair, glowing red eyes kneeling barefoot at night holding a glowing red sword, wearing a hooded cloak under a crescent moon.
Cinderella with glowing blue Victorian dress dancing a waltz with a prince in Victorian military uniform inside a grand castle ballroom.
A skeletal hand bursting out of a moss-covered grave in an old graveyard, surrounded by weathered headstones and overgrown vegetation under an ominous dark sky.
Woman warrior standing barefoot against a flat yellow background, wearing a deep purple kimono with golden phoenix embroidery, holding a large ornate halberd, with a blunt ash-blonde bob haircut.
Hyper-realistic close-up of a boy with vivid blue eyes and short spiky golden-yellow hair, wearing an orange jacket, tenderly cradling a large green frog against a soft olive-green background.
A lone hooded figure in a dark cloak walks through a barren, debris-strewn landscape towards a massive, partially collapsed dome emitting smoke.
Dark atmospheric digital painting of a skeletal horned creature with glowing eyes and flowing ethereal hair crouching on a pillar under a stormy moonlit night sky.
A deep ocean underwater scene with dark blue water, bubbles rising upward, and a dynamic white water splash illustrated in flat colors.
Impressionist style painting of Ranunculus flowers with vibrant yellow, orange, and pink layered petals, thin textured stalks, serrated clustered leaves, and soft pastel background.
Anime-style image of a girl with long rainbow hair sitting cross-legged on a mossy log, gently petting a large white wolf resting its head in her lap, surrounded by an ancient foggy forest with glowing mushrooms.
Anime girl standing barefoot on an empty subway platform at 3AM, wearing a sailor uniform and holding a red spider lily, with holographic glitch effects and flickering fluorescent lights.

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