Story Part Splitter
Paste a long story and choose how long each video should be. It splits at the ends of sentences, never mid-sentence, and near the end of a part it prefers to break after a question or exclamation, which makes a better cliffhanger. Nothing leaves your browser.
About 144 words per part at a normal reading pace (150 words per minute).
Tips for multi-part stories
Open every part after the first with a one-line recap, so new viewers can follow. End each part on an open question rather than in the middle of a sentence; viewers who feel cheated scroll away.
Check how long a single part reads with the script length calculator.