Caption Length Optimizer
Not just a limit check: the optimizer compares your caption with commonly cited ideal ranges, shows the feed fold, and suggests what to tighten or expand.
Runs 100% in your browser · nothing you enter is uploaded
How to use it
- Paste a caption and pick a platform.
- Read the score, fold preview and suggestions.
- Edit until you land in the sweet spot.
Questions
Where do the ideal ranges come from?
They are rule-of-thumb ranges drawn from widely shared industry studies. Your own audience data beats any benchmark.
Does the hook matter?
Yes — the text before the fold carries the post, so we show it separately.
More tools on this bench
Browse all 76 →Character Counter
Count characters, graphemes, words and bytes with live limits for every network.
Word Counter
Words, sentences, reading time, speaking time and keyword density at a glance.
Hashtag Counter
Count, dedupe and clean hashtags, with recommended limits per platform.
Bio Length Checker
Check a profile bio against the limit of every major platform at once.
Text Case Converter
Switch text between UPPER, lower, Title, Sentence, camel, snake, kebab and more.
Slug Generator
Make clean, SEO-friendly URL slugs from titles — one or a whole list.