Phedra
Describing a change to a picture you already have is genuinely quicker than opening a design tool, and the extension puts that one click away from anything you are browsing. The catch is a rebrand mid-flight: Synthesys X became Phedra X, only an annual price is legible on the pricing page, and the advertised API link is dead.
Pros
- Prompt-driven edits applied to an existing image rather than generating from scratch
- Chrome extension works on images in place while you browse
- Includes 4K upscaling, background removal and in-image text changes
- One flat subscription instead of metered credits
Cons
- Rate-limited to roughly 150 generations per three hours, so not unlimited throughput
- No refunds, and the only clearly displayed price is an annual commitment
- The API link in the footer returns 404, so there is no developer path