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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.

Close-up of a young woman with brown hair and hoop earrings wearing a white Adidas jacket with yellow stripes, playfully sticking out her tongue in a car.
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.
Get inspirations

Made on Diffus

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

Oil painting of a creepy Japanese horror girl Kuchisake-onna with glowing red eyes, pale translucent skin, blood tears, and intricate modern kimono under Rembrandt lighting.
Monochromatic side profile sketch of a futuristic android geisha woman wearing a large dark visor, with an open cyborg mask revealing mechanical parts inside her head and neck.
A hyper-realistic image of a young woman in a dynamic, twisted pose with long flowing black hair. She wears black clothing and is set against a detailed background combining organic and geometric shapes in muted red and gold tones with a noir atmosphere.
Silhouette of a male figure wearing a fedora and trench coat, with red streaming tears and a cigarette, standing under rain in a dark city.
A hooded alchemist figure reading a mystical book while seated on a glowing celestial chair surrounded by white flowers in a misty, otherworldly landscape.
A hellish battlefield with a dark silhouette of a figure holding a weapon, surrounded by burning trees and fiery lava flowing from a large castle under a red sky.
Black and white pencil sketch of a man standing at the edge of a rocky cliff, rendered in a surrealism style with intricate graphite details.
Digital anime-style portrait of a woman with vibrant pink, purple, blue, and green hair adorned with small white flowers, glowing off-shoulder dress, and intricate light textures.
Anime-style digital painting of a female character with flowing white hair wearing a shimmering blue-green bodysuit standing in water surrounded by rocky shoreline under soft lighting.
Black and white high-contrast image of a muscular woman with short white hair, wearing a black sleeveless top and white pants, standing barefoot on a reflective surface holding a large bell.
Black and white portrait of a woman with long, detailed braided hair, illuminated with volumetric lighting highlighting her sharp facial features and beautiful eyes.
A young cyberpunk robot girl with glowing red mechanical joints and flowing white hair stands by a tranquil lake holding a lit sparkler, with a futuristic city skyline at sunset in the background.
Portrait of a pale-skinned girl with black bob cut and feather skull hair ornament holding a grumpy Siamese cat, viewed through a window.
Watercolor portrait of a woman with smooth green skin, draped in textured green leaves forming a hood and cloak, with her face partially shadowed and a prominent leaf covering part of her cheek, set against a dark green background.
A regretful young man in textured oil painting style releases glowing hurtful words that turn into white sparrows flying into a stormy twilight sky, trying to catch them with an old torn butterfly net against a dramatic cityscape sunset background.
Portrait of a young woman with dark bob haircut illuminated by blue light, standing under a red neon sign reading 'NO Sleep' in a moody urban night setting.
A semi-realistic fantasy android cyborg with glowing orange eyes, covered in green leaves and branches, featuring a large white flower on its head against a black background.
A hyper realistic scene of a knight in shining armor wielding a sword and battling a large mythical kraken octopus with tentacles splashing water intensely.
Two armored UltraM40k knights stand back to back firing guns with muzzle flashes, surrounded by monstrous creatures in a grimdark, backlit environment.
POV of a boy holding a magic wand pointed toward a surprised young woman in a Hogwarts school uniform, her skirt lifting as if by wind, in a hall with wooden floor and framed wall decorations.
First person perspective of a hand holding a glowing red potion in a round glass bottle while the other hand is pulling the cork, with an injured barbarian in the blurred background in a fantasy setting.
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.

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