Image editor caption

Purpose: The tool generates image captions to accompany visual assets, supporting content creators, marketers, social media managers, and accessibility-focused editors. It accepts an image or image metadata and returns multiple caption options and alt-text suggestions to accompany visuals across blogs, feeds, and product pages. Ideal when you need consistent, expressive captions that improve comprehension and searchability while maintaining brand tone.
Core logic: Required inputs include the image (uploaded or described by subject tags), preferred language (default en), target length (short/medium/long), and tone. Optional/advanced features include alternative caption variants, SEO-conscious keyword insertion, hashtag suggestions, and alt-text scoring aligned to WCAG 2.1. Outputs include a set of caption candidates, alt-text, and suggested edits. The tool supports localization-ready variants and tone presets, and can cap output length to fit CMS constraints.
Inputs & Outputs: Inputs: image file or subject tags, language code, length, tone. Outputs: array of caption strings, corresponding alt-text, length category, tone tag, and optional hashtags. Validation enforces non-empty image input or subject tags; length bounds (e.g., 5–25 words per caption) and character limits for social posts.
Algorithms & Calculations: Combines template-based caption templates and AI-driven scoring. Drafts descriptive captions from visual cues (subject, color, action) and metadata; ranks by semantic coverage and brevity; applies tone and length constraints; if keywords provided, integrates them semantically without keyword stuffing; generates multiple variants and returns top N.
Error & Edge Cases: Missing image input triggers a domain error describing required inputs; external caption API limits or failures degrade to neutral descriptive captions; localization fallback to English when locale is unsupported. Edge-case handling ensures alt-text remains informative even for complex scenes.
Industry/Region & Localization: Primary output language is English (en), with optional locale variants (en-GB, en-US). Accessibility standards referenced: WCAG 2.1; SEO considerations follow best practices for image metadata and alt-text.
Assumptions & Exclusions: Assumes user has rights to describe the image; excludes UI guidance, branding, or analytics integration details; not a full CMS exporter, but provides ready-to-paste captions and alt-text.