FastImage Editor Guide
How to edit and generate images with prompts, credits, and My Works
Introduction
FastImage (fastimage.art) is a prompt-based image editor and generator. Upload one or more images, describe what you want to change, and download the result.
This guide matches what you can do on the landing page today: image-to-image edits, text-to-image generation, credit-based usage, and your personal “My Works” history.
Two ways to create
1) Image-to-Image (Editor)
Upload up to 8 images, write a prompt, and let the model produce a new image based on your instructions.
Common use cases (as shown in Examples):
- Remove unwanted text/watermarks
- Convert style (photo → illustration, anime → realistic, etc.)
- Combine multiple photos into one composition
- Virtual try-on / outfit changes
- Precise edits (change specific parts without rewriting the whole image)
You can also choose:
- Aspect ratio (or “auto”)
- Model (
nano-banana/nano-banana-pro) - Output quality (1k / 2k / 4k)
2) Text-to-Image
Describe what you want, choose an aspect ratio and quality, then generate a fresh image from your prompt.
Credits and plans
FastImage uses credits to keep generation reliable and predictable.
- Each edit/generation consumes credits (cost depends on the tool/model you pick).
- Credits can come from subscriptions or one-time credit packs.
- Some credits may expire (see plan details on the pricing page).
Tip
Start with the default model and 1k quality, then increase quality once you like the result.
Prompt recipes
Remove text or watermarks
Remove all text and watermarks. Reconstruct the missing background naturally.
Keep the original colors and lighting. Do not add new objects.
Change style (keep composition)
Convert this photo into a clean flat illustration style.
Preserve the layout, subject pose, and main colors. Smooth the background.
Combine multiple photos
Create one coherent scene using these images.
Match lighting and perspective. Blend edges naturally. Keep faces recognizable.
Virtual try-on (outfit changes)
Replace the outfit with a modern casual style (neutral colors).
Keep the person's face and body shape unchanged. Keep the background intact.
Precise local edits
Only change the sky to a sunset. Do not modify buildings, people, or colors elsewhere.
Save, download, and manage results
- Download results directly after generation.
- View your successful generations in “My Works”.
- Remove items you no longer want from your history.
Your content
Only upload images you own or have permission to use, and avoid requesting illegal or harmful content.