Diffus
Get started
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
Behance logoGoogle logoCanva logoSquarespace logoAmazon logo
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.

A girl rowing a small boat in a stormy sea with large waves and a swirling bright sky above, anime style
Cross Belt Blindfold | Illustrious Illustrious 2.0
A mystical forest guardian wearing ethereal white robes stands barefoot in a dark forest, her glowing blue antlers adorned with moss and vines, with shimmering eyes and cinematic lighting.
Eldritch Fantasy for Flux v1.2
Rhea/レア (Fire Emblem: Three Houses) SDXL LoRA | 5 Outfits [Illustrious] v1 (Illustrious)
zhongfenghuaStyle_FLUX_ Lora | 厚涂笔触_FLUX版_ Lora v1.0
Extreme close-up of a person with ashy skin wearing aviator goggles with colorful reptilian lenses, bright green lipstick, long black hair with vibrant green streaks, and blue ribbons, surrounded by neon bokeh light effects.
A pale-haired gothic sorceress clad in detailed black and gold armor wielding a rune-inscribed sword, standing on rocky terrain before a colossal obsidian dragon with glowing crimson eyes, set against a pink and purple ethereal sky.
A girl with folded ponytail wearing a white dress with Juliet sleeves and white strappy heels sits calmly on a wooden bench next to a fierce black dragon, illuminated by dappled sunlight filtering through surrounding foliage.
Nova Furry XL Illustrious v6B
Stormtrooper outfit v1
She-Venom (Illustrious) v1.0
Ant King Beru Solo Leveling IL / PD / XL-GMR Ant King Beru Pony-GMR
Fusor's Cute-sor Style II [Illustrious] v1.0
Get inspirations

Made on Diffus

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

A dark humanoid figure with a glowing red circular object for a head is running down a dimly lit hallway with speed lines emphasizing movement.
A fluffy chibi wolf 2D sketch howling at a large bright full moon in a photorealistic nighttime nature scene with rocks and forest.
A woman meditating peacefully at the river edge in a lush jungle surrounded by big green plants, vivid orange flowers, and colorful paradise birds flying above under soft ambient lighting.
A moss-covered supercomputer structure with glowing lights, situated in a lush green forest with tall trees and a mossy stone path, evoking a pristine Victorian science fantasy laboratory atmosphere.
A dimly lit still life featuring a cracked spellbook with parchment pages covered in runes, a human skull adorned with a pendant, a mechanical staff emitting violet energy, glowing arcane candles on brass holders, and steampunk goggles resting on another skull, set on a black velvet cloth.
A futuristic orc mercenary with rugged goggles and a lit cigar, wearing battle-worn armor against a vibrant psychedelic space background, painted in an oil painting style with visible brush strokes.
A sky-seer goblin with a large spherical helmet featuring three eye-like lenses stands on a rocky hill, casting warp-routes into a stormy sky filled with floating islands and glowing navigation orbs, rendered in a dark fantasy oil painting style with vibrant colors and punk aesthetics.
Portrait of Queen Nefertiti wearing a detailed blue and gold Nemes headdress and collar, illuminated by moonlight against a star-filled night sky over the Nile River delta.
Ultra-realistic digital portrait of a pale woman with a sharp boy cut and red glitter lipstick holding a transparent red orb, wearing an ornate black garment with floral embroidery under dramatic light bands.
Highly detailed nu disco and retro pop album cover featuring a white woman with elaborate futuristic accessories and intricate design elements on a vibrant pink background.
Cybernetic female portrait with glowing red eyes, intricate mechanical and geometric futuristic headpiece, illuminated by dynamic volumetric lighting in dark and red hues.
Vintage steam locomotive with black and red design emitting large plume of orange and gray smoke, traveling through a snow-covered mountainous region with snow-dusted trees.
Portrait of a woman with vivid red hair flowing dynamically, captivating blue eyes, and glossy red lips against a dark background with dramatic lighting.
Stylized angelicpunk elf female portrait with white feathers and colorful accents, rendered with niji iridescent style and volumetric lighting
Close-up digital portrait of a cyberpunk girl with neon yellow and purple hair, multiple tattoos and piercings, wearing a black leather jacket and fishnet top, with vibrant neon background.
A dark emperor wearing an ornate black porcelain mask cracked in half, detailed with elaborate silver embellishments and 16th-century style armor under dramatic lighting.
A female pianist in side profile playing a grand piano in a painterly room, bathed in warm golden and cool blue light with surreal flowing colors.
Extreme close-up side profile of an adult female with scaled facial skin wearing an angler fish hood with a glowing yellow lure, surrounded by colorful neon bokeh lights and atmospheric lighting.
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.
Intricate blueprint of a robotic woman featuring a vintage CRT television monitor as a head, detailed mechanical torso with exposed pistons and gears, and a battle ax held in a mechanical hand on aged sepia parchment.
A girl with short messy brunette hair and freckles wearing an oversized wool coat sits at the river bank during golden hour, fishing with a rod, smiling towards playful dogs nearby.
A crystal wine glass containing a miniature twisted oak tree with autumn leaves, set in a surreal landscape of volcanic mountains and a fiery sunset reflected in the glass.
Digital oil painting of a young Cleopatra with brunette bob hair and blue Egyptian dress standing in front of Egyptian pyramids and ruins, adorned with gold accessories.
Oil painting of a graceful young android princess in Victorian dress seated at an antique table with visible robotic arms, detailed in H.B. Claflin style with Rembrandt lighting.
A hyper-realistic digital painting of a woman’s face with curly black hair, round glasses magnifying her deep dark eyes, fair skin with light freckles, and dramatic lighting highlighting her intense gaze.
Highly detailed black and white knight helmet with textured armor on a vivid red background, showcasing high contrast and minimalistic graphic illustration style.
A warrior knight clad in antique steel plate armor with gold filigree rides a colossal snow leopard on a snow-covered mountain ledge surrounded by icy peaks and swirling clouds.
Rocky desert landscape featuring tall hoodoo rock formations under a vibrant purple-orange sunset sky with foggy weather and reflective water pools.
A majestic azure dragon emerges behind a powerful waterfall surrounded by lush forests under volumetric golden light and mystical glowing ambiance.
A cheerful pale gothic young teen angel with translucent white skin and large feathery white wings, standing inside a medieval church, bathed in warm light.
Advanced humanoid robot with sleek metallic textures and neon lights repairing itself in a futuristic high-tech lab environment with realistic reflections and detailed mechanical parts.
A man tenderly holds a woman close, their faces illuminated by soft blue neon reflections from a futuristic city skyline in a retro cyberpunk style.
Close-up of a weathered hand gripping an ornate golden staff with intricate patterns, snowflakes falling, wearing a dark sleeve with gold embroidery, set in a magical wintery atmosphere.
Pikachu girl in trainer outfit riding a yellow electric bicycle with a huge battery display reading BUZZ TAX, surrounded by lightning and electricity effects.
Close-up profile of a woman with black skin adorned in intricate gold leopard-patterned face and body paint, wearing a gold crown and large gold earrings, with closed eyes and black lipstick.
A close-up view of a menacing spider with a glowing red eye, metallic sheen, and sharp fangs on an intricate web in a dark fantasy setting.
Extreme close-up of a young East Asian woman with silver-white hair, freckles, elf ears, and expressive brown eyes, softly lit in a warm background.
Hyper-realistic close-up portrait of an alien humanoid with pale, white marble textured skin, large pointed ears, and wearing elaborate segmented armor against a black background.
A vampire with pale skin and flowing white hair stands on the grand staircase of a dark gothic mansion, surrounded by swirling dark mist and bats.
Close-up portrait of a woman partially hidden behind translucent purple smoke, with faint constellation patterns on her skin, glowing purple eyes, and a cosmic void 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