If you want an open graph image generator that you can customize and that works with widely used frameworks like Next.js or Sveltekit, OG Image is a great choice. The tool generates high-quality thumbnail images automatically so you can focus on other tasks. It's fully customizable with Tailwind CSS and works natively with Next.js and Sveltekit. The service offers a variety of pricing options, including an Essential plan that includes source code and unlimited images, so it's a good option if you want something that's flexible and affordable.
Another tool worth considering is getimg.ai, an AI image generation service with a variety of features including an AI Generator for generating images from text prompts, Image to Video conversion, and a Real-Time AI Generator for fast image generation. It's not specifically designed for open graph images, but it can generate high-resolution images and can be integrated with other tools, so it's worth considering if you're looking for an all-purpose image generation service.
If you're looking for something free, ImgGen generates high-resolution images from text prompts without requiring you to sign up or add watermarks. It supports a range of editing tools, so it's good for creative and professional projects. It doesn't have direct integration with frameworks like Next.js or Sveltekit, but its ease of use and editing power make it a good option for quick image generation and editing needs.