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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.

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.

2D hand-painted chibi mushroom warrior with katana lunging across a bokeh-lit forest floor, surrounded by swirling motion trails and kicked-up leaves
Black and white portrait of a Nordic woman with green eyes, wearing a knit hat with frost and snow falling around.
Close-up digital painting of a young girl with pale skin and large blue eyes holding a glowing blue lightsaber, dressed in intricate ornate Jedi robes, illuminated with dramatic Rembrandt lighting.
A surreal scene featuring a giant, detailed eye with fiery iris dominating the sky above a twilight forest. A black SUV drives along a winding road beneath the eye, surrounded by mist and bare, dark trees.
A stylized geometric seascape showing a fisherman standing on a rugged shore, holding a fishing rod, with swirling circle patterns and abstract waves in a monochrome, linocut print style.
Colossal alien mothership with a biomechanical hull resembling fused chitin and corrupted flesh, glowing yellow-green bio-luminescent lights, drifting over a murky gas giant with a lone figure below.
Digital portrait of a regal female Zerg-inspired character wearing purple chitinous carapace armor and a horned crown, with glowing yellow-green eyes and detailed organic features.
A dark-robed figure with an embroidered silver tarantula stands before a glowing keyhole-shaped stone portal amid an ancient, lush jungle with towering trees, glowing mushrooms, and colorful exotic plants, revealing snow-covered mountains visible through the portal.
Male figure with wavy blue hair wearing a half chrome, half gold skull mask, metallic collar, red velvet shirt and sparkling chains under dramatic lighting.
A man stands on a giant eye-shaped platform hovering over a mirrored lake, with a swirling whirlpool sky in surreal gray and pink gold tones.
A surreal, dark fantasy garden filled with oversized skulls intertwined with roots and vibrant, fragile flowers under a gloomy sky.
Model in a dark green owl-inspired outfit featuring feathery textures and flowing fabrics under soft golden and emerald studio lighting.
Flat vector illustration of an abstract girl with absurdly long fiery hair standing with a sun behind her and holding a flame in her hand.
A surreal rabbit character with black and orange markings stands on a tree stump in a dark fantasy forest with sunlight rays and a mysterious atmosphere.
Black and white anime-style character with purple flowers and splatters standing in an urban street with fisheye perspective
An armed figure stands in a snowy, post-apocalyptic city street with abandoned cars and red blood staining the snow.
A person dressed in an ornate metallic steampunk outfit stands on a foggy cobblestone platform holding a detailed gun, with a vintage steam train in the background.
Close-up of a weathered cyborg with a half-mechanical face, glowing blue eye, barcode tattoo on his temple, white beard, and rusted mechanical parts, set against a black background.
Black and white digital illustration of a large raven perched on a security camera placed on a jagged rock, blending natural bird features with surveillance technology.
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.
A fierce tattooed woman with a cigarette clenched in her mouth grips the steering wheel of a battle-worn armored combat vehicle amid fiery explosions and chaos.
White-haired warrior in elaborate dark red armor holding a staff, surrounded by skeletal warriors and a gothic city under a blood-red sky with flying dragons.
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.

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