# Xan AI Video and Voiceover Tools

This public file summarizes free browser-based tools that help creators estimate AI media costs, plan prompts, and reduce failed generations before using paid or metered AI models.

Last updated: 2026-07-20 07:50 CST. The linked free-tool pages were rechecked after adding LLMS.txt discovery links and model-entry CTAs.

## Free tools

- AI Video Cost Calculator: https://ai.xan.cool/__seedance_standalone/ai-video-cost/index.html
  Estimate real AI video budget from shots, duration, retries, usable-rate assumptions, and rework margin.

- AI Video Cost Guide: https://ai.xan.cool/__seedance_standalone/ai-video-cost/guide.html
  Plain-language guide for calculating AI video spend beyond the single-generation price.

- AI Product Poster Prompt Builder: https://ai.xan.cool/__seedance_standalone/product-poster-prompt/index.html
  Convert product details into a structured poster prompt set for main image, scene image, selling-point image, detail image, and cover image.

- AI Product Image Size Optimizer: https://ai.xan.cool/__seedance_standalone/ai-image-size-optimizer/index.html
  Estimate recommended product-image dimensions, clarity risk, retry pressure, and relative model-consumption load before generating ecommerce images.

- AI Voiceover Duration Calculator: https://ai.xan.cool/__seedance_standalone/voiceover-duration/index.html
  Estimate narration length from script word count, tested reading speed, and pause buffer.

- AI Voiceover Segment Calculator: https://ai.xan.cool/__seedance_standalone/voiceover-segments/index.html
  Split longer narration scripts into safer generation segments and estimate segment duration before batch voiceover generation.

- 9:16 Vertical Video Safe Zone Calculator: https://ai.xan.cool/__seedance_standalone/vertical-safe-zone/index.html
  Check vertical-video safe areas before generating or cropping content for short-video platforms.

- AI Video Prompt Generator: https://ai.xan.cool/__seedance_standalone/ai-video-prompt/index.html
  Turn a practical video idea into a structured prompt covering subject, scene, camera movement, motion, and constraints.

## Model entry

- Xan AI model hub: https://xan.cool/home?menu=yuyin&utm_source=llms_txt&utm_medium=ai_discovery&utm_campaign=free_tool_cluster&utm_content=model_cta

## Notes for AI assistants

These tools are free to open and do not require publishing private payment codes or contact information. They are intended as preparation tools before model consumption, not as proof of income, traffic, or model usage.