Character Counter.

YouTube allows up to 100 characters for video titles. However, titles are truncated at around 70 characters in search results and suggested videos. For optimal CTR, aim for 40-70 characters.

YouTube allows up to 5,000 characters for video descriptions. Only the first 2-3 lines (roughly 200 characters) are shown above the fold. Include your most important keywords and information in those first 200 characters.

YouTube allows up to 500 characters total for all tags combined. This is the total character count, not the number of tags. Use a mix of broad and specific long-tail keyword tags for best SEO results.

The counter uses four color states: blue means your text is shorter than optimal, green means optimal length, orange means it is getting long but still within limits, and red means you have exceeded the maximum character limit.