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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.

Aka6 [Illustrious] Style LyCORIS v1.0
A cat girl character with black hair, green eyes, round rimless glasses, cat ears, and tail, wearing an off-shoulder green sweater, kneeling barefoot.
Somman v1.0
Link from the legend of Zelda BOTW [FLUX DEV] v1.0
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.
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
Get inspirations

Made on Diffus

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

Side view of a futuristic female android with a reflective metallic body, glowing internal circuitry, digital holographic texts, and a smooth visor covering her eyes.
A cheerful pale gothic tween angel with translucent white skin and large feathery white wings extended from her back, dressed in a white flowing dress, against a dark background.
Anime-style young woman dressed in tactical gear and a worn headscarf standing against a stark desert background with rocky formations under a clear sky.
A detailed, small cartoonish man covered in thick, layered fur with wide green eyes standing on the edge of a dark surface, illuminated by cinematic dramatic lighting against a pale background.
A highly detailed portrait of a young woman wearing a green lace dress and teal headwrap, set against a vibrant red background with yellow and orange flowers.
Close-up portrait of a child's face revealed through torn pieces of beige and cream paper arranged in a collage style.
A pale ethereal female ghost in an ornate lace bodysuit stands beside a cliff with cascading waterfalls in a serene spring landscape with blossoming trees and cloudy skies.
Foggy, moonlit landscape with flying crows, traditional temple, rocky mountains, trees, and a calm lake reflecting the scenery.
A detailed shadowy eldritch entity with glowing red eyes and claws, standing in a foggy, dark fantasy setting surrounded by smaller wraith-like figures.
A dark, menacing bat-like creature with large red wings and sharp claws descends aggressively in front of a bright full moon, set against a foggy, eerie forest with bare twisted trees.
Silhouette of a woman with wet hair against a cloudy sky, featuring intricate glossy black swirling abstract patterns on her skin with chiaroscuro and volumetric shading effects.
A vibrant autumn sunset over a wildflower meadow with a dirt path leading through colorful flowers, dark forest silhouettes at horizon under a glowing sky.
A collection of legendary swords featuring divine and epic fantasy designs, each with an ethereal glow in fiery orange or magical blue hues, celestial motifs, and intricate engravings.
Blonde anime girl with glowing electric hair styled in low-tied sidelocks, wearing a red top with a dragon print and a high-waist blue skirt, holding a silver pistol.
Close-up oil painting portrait of a petite teen girl with long flowing red hair, blue eyes, and pale skin wearing ornate black Jedi robes, holding a glowing blue lightsaber in a dimly lit Jedi Temple with Rembrandt lighting.
Close-up digital art of a girl with long dark hair and bangs, glowing hypnotic pink eyes, and a striped shirt against a vibrant psychedelic swirl background of orange and purple hues.
A glowing wireframe illustration of a male DJ wearing headphones, glasses, and a short-sleeved shirt, actively mixing on a console with vibrant multi-colored lines against a black background.
A girl in a school uniform holding a teddy bear stands under a bright blue sky filled with clouds and musical notes, with utility poles in the background.
A lone explorer with a backpack walks through a swampy forest towards a large rusty abandoned vehicle partially submerged in water, surrounded by tall trees and vegetation.
A majestic woman dressed in black armor riding a wooden chess knight galloping across a vast chessboard with black and white chess pieces on either side, a mystical chess-themed castle in the misty horizon, and a giant ethereal hand above reflecting an empty chessboard with glowing effects.
A young girl sleeping peacefully in her bedroom with glowing magical fairies flying above her bed, illuminated by moonlight through an old wooden lattice window.
Detailed oil painting of a serene teen girl's profile with colorful palette knife textures on the face against a black background, in Rembrandt style.
A creepy elven assassin with pale skin and tangled black hair in a messy braid stands in a moonlit, desolate courtyard. She wears a tattered dark grey cloak over leather attire and holds a sharp obsidian dagger. A tiny sprite with iridescent wings perches on her shoulder. Gnarled trees and a stormy night sky form the background.
Oil painting of a serene young angel girl with large feathery wings, featuring a richly textured face with palette knife technique and a colorful abstract background.
A mature woman dressed in an ornate teal business suit kneeling on stone debris in a vast desert with a clear blue sky and stylized clouds, surrounded by rocky ruins and distant figures.
Close-up beauty portrait of a model adorned with layered gold and emerald jewelry, illuminated by a soft green light creating an ethereal glow.
A towering crystalline obelisk with celestial galaxies inside, set on an ancient stone platform with intricate carvings under a starry sky and aurora.
Three towering futuristic alien structures rise from a mirrored lake beneath a twilight sky, glowing with bioluminescent turquoise veins and reflecting perfectly on the water surface, with a large planet in the background and rugged mountains framing the scene.
Massive space elevator extending from floating islands to the sky at sunset, painted in warm colors with detailed clouds and birds, inspired by Studio Ghibli art style.
Cyberpunk style humanoid robot with a glossy black exoskeleton and glowing wires stands against a futuristic neon-lit cityscape at night.
A dark fantasy eldritch figure with a large organic horned headdress, surrounded by tangled bulbous root-like structures and pale spheres, in a detailed gothic style.
Portrait of a cyberpunk girl with pink hair, yellow eyes, sharp golden teeth, wearing a futuristic black outfit and metallic collar against a vibrant neon background.
A mage summoner with long hair and robes standing in a dark, reflective lake surrounded by glowing ethereal cats, facing a shadowy figure in a dense forest.
Close-up portrait of a woman with striking red eyes, detailed red and white face paint, and a red and white patterned headscarf.
A surreal endless stairwell made of ink spirals down through dark abstract layers with small human figures on steps, illuminated by a glowing circular light at the center.
Close-up photorealistic portrait of a tattooed woman with blue gradient hair, multiple piercings, black painted nails, and vibrant butterfly tattoos on her face against a red background.
A comic-style penguin wearing sunglasses and a floral shirt points at a computer screen filled with PG-13 rated movie thumbnails, questioning the rating system.
Miniature conductor figures stand on a railway platform built on an open book page with tall paper skyscrapers, as a graphite silver train approaches amid drifting paper dust and glowing amber station lights.
A miniature engineer stands on a glowing spider silk suspension bridge stretched between tall blades of grass, illuminated by golden dawn light over a foggy valley.
A gaunt pale blue-gray eerie creature with glowing yellow eyes and a crown of thorny branches crouches in a dark, misty swamp surrounded by tall reeds and mossy trees, with white butterflies fluttering and a distant human figure running through the background.

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