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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.

DnD_Grainyboyz Lora FLUX DnD_Grainyboyz V1.0
Wizard's Experimental Photography Lab Portraits
Vixon's Pony Styles - Piotr v1.0 Piotr v1.0
Elle (based on Rick & Morty Anime) - Illustrious V1
Useful Quality Embeddings aid291
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.
Amber Style [LoRA 1.5+SDXL] SDXL
Ethereal Glow Flux v2 (Epchs 20)
All Disney Princess (Illustrious) Illustrious
An anatomical chart illustrating a great horned owl as a surveillance drone, showing half natural feathers and half robotic machinery with wires, processors, and sensors.
posILustrij v1.0
A tall winged figure in a blue dress adorned with swirling colorful abstract patterns stands against a dark background with artistic splashes and tiny curious characters at her feet.
Sheer Tights (pantyhose) v1.0
White-haired girl with blue eyes sitting on a subway bench with an abstract background filled with many blue eyes.
A glamorous woman in a deep red sequin dress performing with a vintage microphone on a stage with a grand piano and dramatic lighting in a retro nightclub setting.
Aka6 [Illustrious] Style LyCORIS v1.0
Get inspirations

Made on Diffus

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

A solitary woman stands atop a golden sand dune under a clear blue sky, draped in flowing near-black velvet robes that cascade dramatically around her. She wears a silver pendant, and the lighting emphasizes deep contrasts reminiscent of chiaroscuro techniques.
A noble Mayan princess in elaborate bronze ceremonial attire stands beside a fierce black panther under a blood-red solar eclipse sky with a Mayan pyramid silhouette in the background.
A towering cybernetic leviathan looms over a female character in a dark, dystopian landscape illuminated by ruby red neon and atmospheric haze.
A vibrant digital painting of a fantastical city with tall, ornate towers embedded in towering lush green rock formations featuring multiple waterfalls cascading into a turquoise sea under a bright blue sky with fluffy clouds.
A muscular, black and orange-toned modern robot in a South Korean urban setting, storming a barricade on a cracked street surrounded by worn, industrial-style buildings under dramatic lighting.
Digital painting of a planetary exploration base on a dusty red-orange landscape featuring a towering central control tower, armoured turrets, research buildings, and a vivid sunset sky with a large yellow moon.
Portrait of an elegant woman with long dark hair wearing a wide-brimmed hat adorned with white flowers, dressed in a white dress against a pale blue background.
A woman resembling Wednesday Addams dressed in a black genie style outfit with gold accents, holding a glowing genie lamp with smoke, and wearing double braided black hair.
Close-up macro image of a Caucasian woman's face covered in vantablack velvet texture, highlighting a striking blue eye and soft velvet skin details.
Gwen Stacy from Marvel standing against a red and beige diagonal background wearing a tight black and white superhero costume with blonde hair.
Monochrome city street at night with colorful rainbow streetlights illuminating the wet road in photorealistic ink and charcoal style with watercolor effects
View from a Scandinavian hilltop with tall wispy grass, scattered trees, and birds flying under a soft orange sky at sunset.
A woman with long dark hair and olive skin wearing worn leather adventurer's attire holds a lantern and an old map while exploring moss-covered ancient temple ruins lit by torchlight.
Close-up surreal portrait of a pale porcelain-like face with closed eyes framed by a fragmented honeycomb structure in white and metallic gold, featuring vibrant red paint splatters.
Illustration of small birds huddled under a decorative umbrella on a wooden pier by a rainy lake with cherry blossoms overhead and mountains in the background.
Vintage style illustration of a man in striped pants and suspenders standing on a rocky landscape looking at a crescent moon with a star, surrounded by dramatic clouds.
A lone figure stands in a misty, dark cyberpunk megastructure illuminated by volumetric lighting with a cinematic post-apocalyptic atmosphere.
Photorealistic studio portrait of a young woman with pale skin, grey-green eyes, and dark hair, wearing a black lace dress, shot with soft, flattering lighting and shallow depth of field on a muted grey-green background.
A hooded dark knight clad in detailed armor stands on rocky terrain wielding a glowing sword emitting swirling green mystic energy.
Portrait of a young woman with short vibrant pink hair and natural skin tones against a plain pink background, wearing a black top.
A curvaceous female robot stands in front of an open wardrobe with her hands on the wardrobe doors, illuminated by stark blue lighting that highlights her sleek, futuristic design against a minimalist dark setting.
A dark warrior wearing a golden skull mask with red glowing eyes, black hood and cape, black combat gear, holding an ornate sword, standing among skulls on a red background with large black wings.
A silhouette of a person stands atop a cracked, glowing spiral staircase with rusty railings, leading into a stormy blood-red sky filled with dark branched orbs.
Portrait of a curvaceous alien with a machine-like face featuring intricate robotic details and armor in a highly detailed digital painting style inspired by Horizon Zero Dawn and artists Artgerm, Greg Rutkowski, and Alphonse Mucha.
Shadowy figure of the Angel of Death with large black wings stands in a dark, foggy forest with sepia-toned mystical lighting.
Digital portrait of a female with black hair and detailed amber eyes, wearing translucent clothing, surrounded by colorful floating ribbons on a simple background.
A girl with an intense gaze walks through dry tall grass, wearing a pinafore dress with long layered copper hair blowing in the wind, bathed in amber and crimson hues under sharp low sunlight.
A scared girl outdoors at night hugging a shiny Pusheen plushie, illuminated by cinematic and volumetric lighting with detailed robe and starry background.
Photorealistic portrait of a handsome young man seated on a wooden bench by an old window, wearing a translucent pale blue-gray shirt with dramatic shadows.
A standing boy wearing a hoodie layered with a jacket and dark pants, set against a backdrop of weathered, decaying urban buildings in muted pastel shades with cinematic lighting and detailed textures.
Oil painting of a shy petite mermaid with long red hair reclining in a large white bathtub, featuring a shimmering silver tail hanging over the tub edge, in classical romantic style.
A detailed oil painting in the style of Rembrandt showing a young teen elf princess with delicate features and pointed ears reading a book closely with a strong green-skinned orc in a romantic woodland setting.
Dimly lit wooden room with an open magic book on a wooden table displaying a fantasy world with trees, mountains, streams, and glowing mist rising from its pages.
Digital artwork depicting a futuristic cityscape at night with a deep blue sky, a winding bridge over a river, distant factories emitting smoke, and illuminated urban buildings.
Minimalistic monochromatic charcoal sketch of a woman in profile with abstract black brush strokes and elegant simplicity.
Ethereal landscape featuring a flowing river under a crescent moon and starry night sky, with golden trees along rocky banks.
A sexy nurse in a short white coat and high heels stands close to a male doctor in a white coat, both illuminated by moody blue lighting and shadows in a minimalist medical office.
Woman wearing a black latex costume with a golden scorpion design, kneeling on a rooftop ledge at night with city lights blurred in the background.
A futuristic scene on a high bridge inside a large spaceport with a woman in a flowing dark dress standing alongside two captains near spaceships and industrial equipment.
Highly detailed fantasy concept art depicting an ancient warrior sitting on a defeated mythical creature under a large glowing moon, rendered in Moebius art style with dramatic lighting.

Flux.2 Klein — FAQs

Try Klein Without Downloading It

And put it next to Flux.1, Qwen and SDXL on the same prompt.

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2,100+ Models

No GPU

Product screen shoot