CaptionFill is a caption and cross-reference tool for Google Docs™. Keep captions and references together as your document changes. Inspect the document, select inline images or tables, and add figure/table captions. Preview proposed numbering and reference changes before Apply. Separate figure and table counters follow document order across nested tabs. Select a caption to insert a linked reference at your cursor, or append a linked list of figures or tables. CaptionFill flags missing targets and copied managed markers instead of silently linking to a different object. Saved Apply progress can be resumed after reopening. Existing captions from other tools are left alone; v1 does not import their private formats. Free: 1 new caption target in total; updating existing captions, references and lists stays free. Existing users keep their current free allowance. $9 once per Google account unlocks unlimited creation, with no subscription or renewal. Works with top-level native tables and inline images in main-body paragraphs. No equations, floating-image captions or exact rendered page-number references. Generated lists are native linked tables. Avoid editing concurrently during Apply; native Google version history remains available. Remove tracking keeps visible content and native bookmark links. Only the document where you use CaptionFill is accessed. Document content stays in Google Docs™ and its add-on storage; Stripe handles billing. No AI service or broad Google Drive™ permission. Google Docs™ and Google Drive™ are trademarks of Google LLC.