Image to image is the most underused capability in generative imaging, and the reason is that people reach for text-to-image by habit. If you already have something close to what you want, editing it is cheaper, faster and far more controllable than describing the whole thing again and hoping.
TL;DR
- Free tiers exist across browser tools and open-source local options
- On 8frame: Flux Edit at 7 credits, Kontext Max at 13, Smart Edit at 33
- The strength setting decides everything, and most interfaces explain it badly
- Editing beats regenerating whenever you already have 70 percent of the image
- Your source is the ceiling. A soft input produces a soft output
What the strength setting actually does
Every image-to-image tool has a control called strength, denoise, or transformation amount. It determines how much of your original survives.
- Low (roughly 0.2 to 0.35). Small changes. Colour, light, texture, minor cleanup. The composition and subject stay exactly.
- Medium (0.4 to 0.6). Style changes while keeping composition. This is the useful middle and where most good results live.
- High (0.7 and above). Your image becomes a loose suggestion. You are effectively doing text-to-image with a hint.
The mistake almost everyone makes: setting it high because the result looks more impressive, then losing the thing that made them start from an image in the first place.
Start low and increase. The correct setting is the lowest one that achieves the change.
What it costs
Canon 8frame prices, a credit is $0.01 at pack rate:
| Task | Route | Credits |
|---|---|---|
| Standard edit | Flux Edit (FLUX.2 pro) | 7 |
| Stronger editing pass | Kontext Max | 13 |
| Complex multi-step edit | Smart Edit | 33 |
| Remove the background | background removal | 12 |
| Upscale the result | Clarity image upscale | 13 |
| Generate from scratch instead | Seedream 5 | 6 |
Note that generating a new image at 6 credits is cheaper than editing at 7. The reason to edit is not cost per operation; it is that you keep what was already right, which saves the attempts you would spend getting back to it.
Where image to image wins
Keeping a composition you like. You have the framing and the subject; you want different light. Text-to-image will give you a different framing every time.
Working from a photograph. Your real product, your real room, your real person, adjusted rather than replaced. This is the honest route for anything a customer will encounter in reality.
Iterating on an approved direction. Once a client approves an image, variations should start from it, not from the prompt that happened to produce it.
Style transfer. Your photograph rendered as an illustration, at medium strength.
Fixing one thing. A distracting object, a colour that clashes, a crop that is wrong.
Where it fails
Adding something that was not there, in the right place. Inpainting with a mask handles this better than a global edit.
Text. Editing existing text in an image is unreliable. Kontext Max at 13 credits is the best of the options and still not dependable.
Faces, at medium or high strength. The identity drifts. For any real person, keep strength low.
Precise geometry. A product's exact shape will shift. For product work, edit only at low strength and check against the real item.
The workflow that uses it properly
- Generate or photograph a base image. Seedream 5 at 6 credits, or a camera.
- Fix the one thing. Flux Edit at 7, low strength.
- Iterate on that result, not on the original prompt. Each edit is 7 credits and compounds toward what you want.
- Upscale at the end, 13 credits, once.
Five edits and an upscale is 48 credits, about forty-eight cents, and it converges on a specific result rather than sampling the space randomly.
FAQ
What is the best free image to image tool? A browser tool for one-off work, or an open-source model locally if you want unlimited attempts and privacy.
What strength should I use? The lowest that achieves the change. Start at 0.3 and increase.
Can I edit text inside an image? Unreliably. Kontext Max at 13 credits is the best option and still not dependable.
Why does my subject change? Strength is too high. Lower it.
Start from what you have, change the least. The 8frame canvas is free and unlimited, and generation is paid from $19/month.