Poster Stack breaks each line into balanced rows and sizes every row to exactly fill the width, locking the words into one squared-off block like a poster headline. Words rise out of their baselines as they are spoken. Built for hooks, title moments and punchy short-form edits.
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Upload your video, pick a style, and let AI do the rest. High-retention captions in seconds.
Upload your video or audio file directly into the browser. Our ultra-fast AI engine will automatically extract the audio and generate highly accurate, word-level transcripts in seconds. Your media never leaves your device for maximum privacy.
Instantly apply one of our many hand-crafted templates to your transcript. Fine-tune the timing, edit spelling mistakes, emphasize specific keywords, and completely customize the colors, fonts, and animations to match your brand.
Once your video looks perfect in the live preview, hit export. Our frame-based rendering engine ensures that what you see is exactly what you get. Export high-quality, perfectly synced videos ready for TikTok, Reels, and Shorts.