Write better prompts, budget your renders, and nail your formats — for Seedance, Veo, Sora, Kling, Runway and more. Everything runs in your browser.
Build cinematic prompts for Seedance 2.5, Veo 3.1, Sora 2 and Kling 3.0 — pick camera moves, lighting and style, get a ready-to-paste prompt.
Generate a prompt →Compare what your video will cost across 10 AI video APIs — Sora, Veo, Seedance, Kling, Runway, Wan — before you spend a cent.
Compare costs →Convert between resolutions and aspect ratios for TikTok, YouTube, Reels and cinema. Includes presets for every major platform.
Calculate ratios →AI video generation moved fast in 2026 — Seedance 2.5, Veo 3.1, Sora 2 and Kling 3.0 each speak a slightly different "prompt dialect", and their API prices range from $0.04 to $0.75 per second. The difference between a mediocre clip and a stunning one is usually the prompt; the difference between a $5 project and a $500 one is knowing the price sheet. These free tools handle both, plus the formatting math every short-form creator does daily.
No accounts, no watermarks, no server round-trips — every tool on this site runs entirely in your browser.