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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.

Close-up portrait of a girl with long black hime-cut hair and red eyes drinking blood from a blood bag using a straw, dressed in a white coat and black shirt with a red necktie, set against a dimly lit dark background with soft shadows.
Quaintly Chaotic Comtesse FINAL
AyamiKojima Style v1.0
Anime Art-Style Anime_Retro
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.
Cyberpunk stylized portrait of a bald woman with tribal patterns and big eyes, lit by pink and blue light with glasses and electrical wires attached.
MeMaXL Flat Anime Style - Noob/Illustrious/Pony/XL v4.0 B [Zootlustrious-v2]
Vanillaware Style | Anima/SDXL v2.0 [Zootlustrious-v2]
Chrome Spice v1.0
Cyberpunk(Photographic style) SDXL V.1.0
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.
Digital line art illustration featuring a woman reclining on a soft surface, viewed from behind, with flowing long blue hair and silk fabric draping over her legs, surrounded by glowing bokeh lights and orbs on a white background.
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
Get inspirations

Made on Diffus

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

Digital watercolor painting of a female knight with armor, dreadlocks, and a fierce expression, set against a muted background.
A stylized white-haired girl with green eyes wearing a dark green overcoat stands in a snowy village at night with falling snow and illuminated lampposts.
Portrait of a 75-year-old mountain hermit with piercing blue eyes and a long white beard covered in frost, wearing a large bear fur coat covered in snow, smoking a wooden pipe, seated on a snow-covered porch with warm lantern light behind.
Orange qilin standing on an orange ground with transparent body showing rural farming land and houses inside.
Portrait of a red-haired female warrior wearing shiny blue armor holding a gun, standing in a desert with rocky formations, depicted from a dynamic low angle with motion lines.
A dramatic desert landscape featuring towering red sand dunes at sunset, with a solitary acacia tree surrounded by swirling dust against a colorful sky.
A detailed black and white fine line drawing of a woman’s portrait with intricate, stylized swirling hair and expressive facial features.
A young athletic woman with tattoos and a high ponytail sits on metal crates holding a glowing purple-bladed decorated sword, wearing combat boots and a pale green crop top.
A hyper realistic biomechanical death angel cyborg with neon veins, adorned with art nouveau fashion and vibrant pink flowers glowing softly against a dark futuristic background.
A black cat wearing goggles and a scarf rides a vintage red motorcycle through a neon-lit city street at night, with a golden retriever clinging to the back seat. Police cars chase behind with flashing lights.
A regal woman with dark hair styled in an updo, wearing a gold crown and large gold earrings, stands amidst turbulent waters with two white swans close by and a dark stormy sky in the background.
A large steampunk-style tower featuring visible gears and mechanical parts, surrounded by trees with pink flowers, set by water under a cloudy blue sky.
Faceless woman with metallic skin in a blue Tibetan robe and ornate crown, showing intricate embroidery and armor elements under soft, dark fantasy lighting.
Portrait of an android girl with luminous white porcelain skin and striking flame blue eyes, wearing dark reflective armor, set against a foggy cyberpunk city background.
Woodblock print showing a tiny floating houseboat on detailed wave patterns under a large moon and starry night sky with visible woodgrain texture.
A vivid hyperrealistic illustration of a gecko with obsidian-black skin and glowing orange eyes and toes, featuring textured scales arranged in Fibonacci patterns, set against a neutral beige background.
Close-up, hyper-realistic portrait of a curious Doberman dog tilting its head with a playful expression against a smooth pink background
Futuristic cityscape featuring a colossal gothic-style edifice with a clock tower, snow-covered mountains in the background, and a woman in a winter coat walking on a snowy path under a large metallic arch.
A tall, orange futuristic industrial building with red circular lights and mechanical details, situated in a cyberpunk cityscape with a hovering vehicle emitting blue light below.
A young woman in an oversized hoodie and boots stands against a red-lit wall, with intense neon lighting and a double exposure effect merging city neon signs and street lights in the background.
A cinematic scene showing a futuristic soldier with a rifle confronting a massive blue dragon boss with red eyes amidst crashing waves and ancient temple structures in the background.
Close-up of a reflective human eye with a detailed iris resembling a colorful cosmic nebula and star constellations.
A colorful hand-drawn sketch of a joyful dog wearing a purple winter hat and red scarf, sitting on a wooden toboggan sliding down a snowy hill with light snowfall.
Oil painting in Vincent van Gogh style depicting a starry night sky with swirling stars, Langlois Bridge over water, a blooming Sakura tree with pink petals, and a rustic house under textured rough brush strokes.
Close-up profile of Elizabeth Liones with white hair and blue eyes, illuminated by cinematic dramatic lighting with a blurred background.
Digital illustration of a female warrior in futuristic Tibetan armor holding a glowing trident, standing next to an elder guide in jade-green robes, with a massive crystalline dragon behind them on cracked coral red ground.
A lone traveler with a staff and a dog stand on a rocky outcrop in a snowy mountainous landscape, gazing at a colossal skeleton pierced by a giant sword under a twilight sky.
A fantasy landscape featuring a field of tall, dark blue oversized swords decorated with red ribbons, surrounded by vibrant pink flowers with a small figure walking on a path under a partly cloudy sky.
A massive gothic castle with numerous spires illuminated by eerie red light, set against a bright full moon and stormy night sky with bats flying.
A vast desert corridor framed by monumental alien architecture with thousands of bronze-armored soldiers kneeling beneath a glowing blood sun, a cloaked priest-warrior in the foreground with raised arms, and starships rising in the background.
Lush lavender field under a vibrant blue sky with fluffy pink clouds, bees flying and foraging, detailed foliage and distant Provence landscape.
A mysterious figure in a black hooded robe wearing a dramatic gold thorn crown, with black leather gloves detailed with gold chains, in dark cinematic lighting.
Side profile of a figure in a black tactical suit marked 230 wearing a detailed beige sci-fi helmet with cables and antennas against a red blurred background.
A lone figure hiking along a rocky mountain path enveloped in mist and clouds, with towering jagged peaks and an ethereal, dreamlike atmosphere.
Macro photograph of a ripe heirloom tomato showing detailed surface texture, speckling, and green stem crown with vibrant reds, yellows, and greens under studio lighting.
A cat submerged up to its face in a bubbly bath with a bright yellow rubber duck on its head, teal tiled background, and pink tub edges under moody lighting.
Silhouette of a girl holding two red heart shapes in a field under an orange sky with bold graphic colors and stylized illustration.
A skeleton king seated on an ornate silver throne under a beam of light, wearing a tall black crown with purple gemstones, a black robe with gold trim, and a thin black translucent shawl over its skull.
Middle-aged Englishman with graying swept-back hair and heavily tattooed arms, wearing a white shirt and dark trousers, sitting on a box in an outdoor backyard smoking a cigarette, with a small white terrier dog beside him, against an old brick wall and wooden door.
A dark, mysterious male silhouette surrounded by swirling ethereal mist and glowing lanterns in a warm-toned fantasy realm rendered with oil painting style.

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