Readable text rendering
Posters, covers and banners with legible typography — quote the exact words and specify weight, case and alignment.
Black Forest Labs
Generate and edit with Flux 3 Klein
Turn a prompt into a polished image, or follow plain-language instructions to edit and combine up to 10 reference images — up to 4K, nine aspect ratios and built-in prompt enhancement.
Flux 3 Klein Studio
text & edit to image
Describe any image and Flux 3 Klein generates it with readable text, precise colors and cinematic lighting.
Click or drop images here
1–10 images (JPG/PNG/WEBP, max 30MB each). Refer to them by order in the prompt, e.g. “put the hat from image 2 on the person in image 1”.Up to 5,000 characters. Use quotes for text that must appear in the image; use hex colors for exact color matching.
Estimated cost 8 gems
Your image will appear here
What is Flux 3 Klein?
Black Forest Labs’ lightweight FLUX 3 image model — fast text-to-image and multi-reference editing with readable text rendering and precise color control.
Up to 4KThree resolutions
10 refsMulti-reference editing
9 ratios21:9 to 9:21
4 imagesPer request
Why creators use Flux 3 Klein
Low per-image cost and multi-reference editing for production-ready visuals.
Multi-reference editing
Combine products, characters and scenes from up to 10 reference images into one coherent picture.
Preserving edits
Swap clothing, light or place while the face, hair and details stay put — describe what to change and what to keep.
Exact color matching
Include six-digit hex codes directly in the prompt for branding, backgrounds and garments.
Fast and affordable
1K drafts finish in seconds at low cost — perfect for generating many variations before choosing a direction.
Prompt enhancement
Short prompts are rewritten into fuller descriptions by default; turn it off for literal instructions.
How to create an image
Pick a mode, configure the output and generate.
1. Choose a mode
Text to Image for new visuals, or Edit Image with 1–10 references for edits and composites.
2. Write the prompt
Describe the subject, lighting and materials — or the change you want, naming what must stay unchanged.
3. Configure the output
Set aspect ratio, resolution (1K–4K), number of images (1–4) and format (PNG, JPEG or WebP).
4. Generate and download
The studio estimates your cost live. Preview the result inline and download the finished image.
Flux 3 Klein FAQ
Answers to common questions about inputs, settings and pricing.
What is Flux 3 Klein?
Flux 3 Klein is Black Forest Labs’ lightweight FLUX 3 image model. It turns a prompt into a polished image and follows plain-language instructions to edit and combine up to 10 reference images in a single request.
What is the difference between Text to Image and Edit Image?
Text to Image generates a new image from a prompt with your chosen aspect ratio. Edit Image takes 1 to 10 reference images and follows an instruction — swap clothing, restyle a scene, or composite subjects from several images into one picture.
How do I reference my uploaded images in the prompt?
Refer to them by order in natural language, for example “put the hat from image 2 on the person in image 1”. Reference images keep their upload order.
What resolutions are available?
Choose 1K, 2K or 4K output (roughly 1, 4 and 16 megapixels). Nine aspect ratios are supported from 21:9 ultra-wide to 9:21 phone strips — Edit mode also offers auto, which matches the first reference image.
How many images do I get per request?
1 to 4 images per request. Each image is billed separately, and with a fixed seed image i uses seed + i for reproducible variations.
How does billing work?
Cost is a per-image rate multiplied by the number of images: 8 gems per 1K image, 16 per 2K image and 32 per 4K image. For example, four 1K images cost 32 gems. Reference images in Edit mode are free.
What is prompt enhancement?
On by default — it rewrites short prompts into fuller descriptions, which noticeably improves quality. Turn it off when your instruction must be followed literally, especially for precise edits.
What file formats are supported?
Reference images: JPG, PNG or WebP up to 30MB each. Output: PNG, JPEG or WebP.
Ready to create your next visual?
Start with a prompt or a set of references and generate polished images with Flux 3 Klein.
Start creating with Flux 3