FLUX Prompt Generator — Free & Fast
Free FLUX prompt generator — turn ideas or photos into optimized FLUX.1 prompts with weighted emphasis and photography-style tags. Free image to FLUX prompt, four goal modes. No sign-up.
1 · Image
2 · Goal
3 · Notes (optional)
0/500
Generated prompt appears here
Upload an image and hit generate
Tips for FLUX
- FLUX responds well to comma-separated descriptors — lead with subject, then environment, lighting, lens, and style.
- Use weighted keywords like (dramatic lighting:1.2) or (bokeh:0.8) to boost or suppress specific elements.
- Keep prompts under 200 words for best coherence — FLUX handles focused descriptions better than tag-stuffed inputs.
- Include lens and camera specs for photorealistic results: 85mm f/1.4, wide-angle, shot on Phase One.
- Describe time of day and weather conditions precisely — 'golden hour haze with long shadows' beats 'sunset'.
- FLUX.1 responds well to film stock references: 'shot on Kodak Portra 400', '8mm film grain', 'Hasselblad medium format'.
Example prompts
portrait of a woman in golden hour light, shallow depth of field, 85mm lens, cinematic color grading, (soft rim light:1.2)
futuristic cityscape at night, neon reflections on wet streets, cyberpunk aesthetic, ultra detailed, wide angle, (volumetric fog:1.1)
close-up product shot of glass perfume bottle, white studio background, soft diffused shadows, shot on Phase One, sharp focus on label
ancient stone ruins overgrown with tropical vines, misty morning light, wide angle, (volumetric rays:1.2), photorealistic
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Free FLUX prompt generator
This free FLUX prompt generator turns ideas or photos into comma-separated, emphasis-friendly prompts tuned for FLUX.1 dev, schnell, and pro. Upload an image for a free image to FLUX prompt, or describe your scene on the text tab — the output is immediately pasteable into ComfyUI, Replicate, fal.ai, or the FLUX playground.
FLUX.1 models respond strongly to comma-separated descriptors with clear subject, lighting, and lens details. Our generator applies FLUX-specific formatting automatically: weighted emphasis for key elements, photography-style tags (85mm lens, Kodak Portra 400, f/1.8), and structured ordering from subject to environment to style.
FLUX prompt structure and best practices
FLUX.1 interprets tag lists more reliably than flowing sentences for image generation. Lead with the primary subject and action, follow with environment and setting, then specify lighting, lens, film stock, and color grading. Weight critical elements: (soft rim light:1.2) boosts that characteristic without overwriting the scene. Keep prompts under 200 words for best coherence.
The free image to FLUX prompt path on PromptMake extracts these elements automatically from any uploaded photo — composition, subject, lighting direction, color palette, and style — then formats them as FLUX-compatible tags. Upload a reference, select FLUX as the target model, and the output is ready to use. No account required for the first three generations.
Related guides
FAQ
Is this FLUX prompt generator really free?
Yes — guests get 3 free FLUX prompt generations per day with no account required. Sign up for a free account to get 5 per day. Pro unlocks unlimited generations and advanced output formats.
What is the difference between FLUX.1 dev, schnell, and pro?
FLUX.1 schnell is the fastest, optimized for speed over quality. FLUX.1 dev offers a balance of quality and speed. FLUX.1 pro is the highest quality, slower model. PromptMake generates prompts compatible with all three — the prompt format is the same across variants.
Can I upload a photo to get a FLUX prompt?
Yes. Upload any image, select FLUX as the target model, and choose a goal mode (Recreate Exactly, Change Style, Adjust Lighting, or Create Variation). The vision analysis extracts subject, composition, lighting, and style into a FLUX-ready prompt.
How do I use weighted emphasis in FLUX prompts?
Wrap a term in parentheses with a colon and weight value: (golden hour:1.3) increases emphasis; (motion blur:0.7) reduces it. Values above 1.0 strengthen the element; below 1.0 weaken it. PromptMake applies weights automatically for important elements in your generated prompt.
Where can I run FLUX prompts?
FLUX.1 is available on Replicate, fal.ai, the FLUX playground (black-forest-labs.com), ComfyUI with the FLUX nodes pack, and several image generation platforms. Copy your generated prompt and paste it directly into any of these interfaces.