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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.

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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.

Anime-style girl in a pink hoodie bending forward, tying red high-top sneakers, with long brown hair and a green backpack outdoors in a park setting.
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 futuristic robotic insect warrior with golden butterfly wings and chrome armor stands confidently with cables in each hand, set against a vibrant paint splatter background.
A retro anime style wolf girl with ginger hair, wolf ears, and a bushy tail sits on a moss-covered balcony railing with a playful expression, plants around, and buildings in the foggy background.
Corin Wickes (Zenless Zone Zero) XL/Ilustrious LoRa v1.0
Protoneon - Illus x Niji v1.0
Color Palettes Red Black & White
Jinx (Arcane / League of legends) | FLUX + Zimage Flux v2.0
Okami Style [FLUX] v1
Suleika Vicious Suleika Vicious
Lovecraftian Nightmare Landscapes Flux
STYLES | PONY & ANIMAGINE RMS v0.1 (Pony V6 XL)
A detailed digital illustration of a female angel with black and red hair, red eyes, white feathered wings, a cracked floating halo, wearing a black vest, white shirt, and red tie, featuring visible tattoos and scars on her arms.
Temogam Art Style v2.0
[Pony] Geekpower Artists Style Optionaltypo
Terrifying Clown (FLUX) flux v1
Nani Pelekai (Lilo & Stitch) - Lora Illustrious Illustrious
Get inspirations

Made on Diffus

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

Aerial photograph of a yellow seaplane flying over a vibrant turquoise ocean, leaving a white wake behind with visible underwater vegetation.
A cinematic portrait of a woman with her face partly illuminated by a narrow beam of warm orange light, casting dramatic shadows on her face and background.
Close-up of a slender, camouflaged praying mantis perched on a lush green leaf with soft diffused light and visible coarse film grain.
Illustration of two girls about to kiss, featuring heart-shaped pupils, camellia and lily flowers, depicted in a retro artstyle with volumetric lighting within a polaroid-style frame
A retro-futuristic portrait of a woman holding a red rose against a purple synthwave gradient background, wearing a sleek black outfit.
Old Danish opera diva in an ornate orange dress stands confidently amidst dark ages soldiers holding spears on a rainy cobblestone street with dramatic lighting.
Futuristic black robot with glowing red lines on chest and head standing against a dark, misty cyberpunk background.
A cyberpunk scene showing nomads wrapped in vibrant neon-patterned fabrics blowing in the wind, set against a glowing turquoise futuristic city with towering skyscrapers and neon billboards.
Witch wearing an oversized brimmed hat and flowing robe, with platinum blonde hair and glowing golden eyes emerging from shadow in dark background.
Portrait of a seated figure with deep ultramarine skin marked by flowing gold veins, wearing a translucent garnet ceremonial robe with metallic embroidery, framed by golden filigree and set against fractured lavender tiles.
Side profile portrait of a woman with dark skin textured like dark sand, adorned with vivid purple flowers and petals, striking lavender eyes, and detailed makeup against a gradient pink background.
A playful 3D creature with dark blue fur, big eyes, and bright orange ears splashes joyfully in a puddle during rain, sticking out its large floppy tongue with water droplets, illuminated by dramatic rim lighting.
A divine female angel with white feathered wings and a glowing halo, wearing battle-worn medieval knight armor, stands in a dark, wrecked convenience store holding a glowing cross and a shotgun.
Close up portrait of a fantasy girl with long blue hair, blue horns, and blue roses, rendered in an impressionist painting style with a dynamic blue color theme on a black background.
A surreal portrait of a female baroque-inspired robot with translucent porcelain skin revealing intricate golden inner mechanisms and ornament-like wiring, dressed in elaborate gold and white attire under chiaroscuro lighting.
A knight wearing ornately detailed black armor with golden trim and a horned helmet stands on a medieval battlefield under a bright blue sky, holding a decorated sword and wearing a flowing red cape.
Close-up of a dark lord's face with glowing green eyes, wearing detailed black hooded robes adorned with mystical symbols, set in a gloomy graveyard.
Intricate fantasy castle with steep gables, balconies, sky-walks, and a large orange dome perched on a rocky cliffside under blue sky with clouds.
A male figure in a brown jacket sits atop a vintage CRT television displaying a glowing blue hypnotic eye, set in a neon-lit urban street with floating vinyl records.
Silhouette of a person dancing dynamically amid a fiery, post-apocalyptic industrial cityscape under a glowing sunset sky.
Digital painting of a desolate futuristic wasteland featuring rusty tall structures on a barren desert with a lone cloaked figure walking towards them under a cloudy sky.
Stencil print of a skull wearing an ornate king’s crown with a simple gray background.
Anime girl with pink and orange hair smiling with many sharp monster teeth extending wide, standing in a dark, flickering light train interior.
A joyful girl with long curly red hair wearing a shiny black Batgirl mask and a green floral sundress, standing in a colorful toy-filled room with bright sunlight.
Haunting digital painting of a female figure with glowing red eyes and smeared red lipstick, surrounded by dark shadows, broken clocks, and red tendrils.
A heroic mage stands cloaked in dark, ornate dystopian armor holding a glowing arcane staff, a black raven perched on their shoulder, against a glowing neon pink moon and swirling mist.
A glowing firefly with translucent purple wings and a vibrant neon green-blue body flying against a dark background with blurred orange bokeh lights.
Close-up of a menacing warrior in dark power armor with red glowing eyes and a skull helmet, standing inside a gothic interior with a broken window casting eerie light.
Helmeted warrior in dark power armor holding a katana on an apocalyptic battlefield with burning ruins and dark smoke.
James Brown wearing a yellow embellished outfit with afro hairstyle, passionately singing into a microphone during a live stage performance.
Black and white dramatic scene of a raven with open beak in foreground and a Nosferatu undead creature emerging from earth with blue mist, gothic cathedral in background.
A digital oil painting of a small elf warrior in silver armor holding a glowing sword next to a large green orc warrior with a battle axe standing over a fallen dragon under a dramatic sky.
A dark fantasy scene of a demonic circus tent made of stretched human skin and blood, topped by a twisted spinal column with a skeletal dragon head, surrounded by skulls and gothic buildings under a stormy sky.
Anime-style girl dressed in a gothic maid outfit with purple accents, kneeling and holding a replica firearm, wearing black heels.
A green-haired maid with purple eyes wielding a large circular saw weapon stands in a dimly lit sci-fi robot factory corridor, blood splashing on the ground.
A cyborg soldier with striking red mechanical hand and yellow eyes, wearing a black military uniform, crouching in a blood-splattered prison hallway with an evil smile and long grey tongue sticking out.
A red-skinned Aka Oni girl with white hair and red horns wearing a black dress adorned with white flowers, posing with a skeleton in a dark background.
Anime-style portrait of a girl in a blue qipao with golden accents licking a katana blade, red eyes, and long black hair in a dark setting.
Anime character Asuka Langley wearing a glossy red pilot bodysuit with a purple-themed sky background, standing confidently with a scenic lake and mountains behind her.
Full body cyborg alien with metallic surfaces glowing with warm sunset light, standing on icy water with snow and reflections around, framed by mountains.

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