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Instant · private
Drag & drop images, paste, or choose a source
JPG · JPEG · PNG · WEBP · HEIC · BMP — analyzed privately in your browser. Multiple images supported.
Pick a mode, platform and tone — captions refit automatically.
Caption mode
Popular
Creative
Business
Education
Brand
Turn any image, topic, product or keyword into scroll-stopping captions with hooks, hashtags, emoji and engagement ideas — across 20 modes, 10 platforms and 12 languages. Fast, free and private.
Upload, paste, snap or link a photo — colors, mood and faces are read privately in your browser.
Viral, Storytelling, Professional, Funny, Luxury Brand and more — mixed with 17 tones.
Instagram, TikTok, LinkedIn, X, Pinterest, Threads, YouTube, Snapchat and Facebook.
5–30 trending, niche and reach-friendly tags with popularity and competition scores.
Virality, reach, audience fit and CTA strength to compare every variation.
From none to high, placed where they add rhythm — never random.
Localize captions for global audiences with curated phrase packs.
The instant engine runs on your device — nothing is uploaded or stored.
Generate, edit, favorite and export to TXT, PDF, DOCX, CSV or JSON.
An AI caption generator is a tool that turns an image, a topic or a few keywords into a finished social media caption — hook, body, call-to-action, emoji and hashtags included. Instead of staring at a blank box, you describe your post (or just drop in a photo) and the generator writes platform-ready copy in seconds, with several variations to choose from.
This generator is built for the full range of creators: influencers and personal brands, marketers and agencies, e-commerce sellers, educators, photographers, restaurants, real-estate agents and small businesses. It pairs an instant, in-browser writing engine with an optional AI-vision upgrade, so it works offline and privately by default and gets even sharper when a vision model is connected.
Every caption is scored for predicted engagement, virality, reach, readability and call-to-action strength, so you are not just generating text — you are comparing options and shipping the strongest one.
When you upload an image, the tool analyzes it on a downscaled canvas to extract the dominant color palette, brightness, contrast, saturation, orientation and overall mood. It can optionally count faces using your browser's detector and read text in the image with on-device OCR. That visual fingerprint tells the writer whether your photo is bright and airy, moody and cinematic, or bold and vibrant.
The caption engine then composes copy from curated, hand-written phrase banks using a seeded generator: a scroll-stopping hook, a body that reflects your content type and mood, and a platform-appropriate call-to-action. Tokens like topic, keyword, benefit, brand and audience are filled in from your inputs, emoji are placed at a density you control, and the whole caption is trimmed to the platform's character limit.
Finally, each variation is re-scored locally for engagement, virality, reach, audience fit, readability, emotional pull and CTA strength, and the set is ranked best-first. Because the engine is deterministic, the same inputs reproduce the same captions — and "Regenerate" gives you a fresh-but-repeatable set on demand.
Captions are optimized for ten platforms, each with its own rules. Instagram (2,200 characters) rewards a strong first line, balanced emoji and a save/share CTA. X / Twitter (280 characters) needs tight, punchy copy. LinkedIn (3,000 characters) favors a professional, value-led tone with lighter emoji. TikTok and Reels reward trend-aware, conversational hooks, while Pinterest leans descriptive and keyword-rich.
Facebook, Threads, YouTube Community, YouTube Shorts and Snapchat are all supported too, each with the right length budget and call-to-action style. Switch platforms at any time and the same idea is automatically refitted — emoji usage, hashtag count and length all adapt so your caption never overflows or feels off-platform.
Great captions almost always lead with a hook — a question, a bold claim or a relatable moment that stops the scroll in the first line, because most feeds truncate after a sentence or two. Keep the middle focused on one idea, write the way you speak, and use line breaks to make longer captions skimmable.
End with a single, clear call-to-action: ask a question, invite a save or share, or point to your link in bio. Use emoji to add rhythm and emotion, not decoration, and match the hashtag count to the platform — a tight, relevant set usually beats 30 generic tags. The generator handles all of this automatically, but you can edit any version to add your personal voice before posting.
On Instagram, the first 125 characters show before the "more" cut-off, so the opening line does the heavy lifting. Use the Viral, Storytelling or Personal Brand mode for feed posts, and lead with a hook the algorithm and your audience both reward. Captions can run up to 2,200 characters, which leaves room for a short story, a few line breaks and a clear CTA.
Instagram engagement is driven by saves, shares and comments, so the generator favors CTAs like "save this for later" and conversation-starting questions. For Reels and Stories, switch the content type to Reel or Story for shorter, punchier copy, and attach a focused mix of trending and niche hashtags — 8 to 15 relevant tags typically outperform a wall of 30.
LinkedIn rewards professional, insight-led writing over hype. Use the Professional, Business, Educational or Motivational mode with a Confident or Corporate tone, and open with a hook that frames a lesson, result or contrarian take. With a 3,000-character limit you have room to tell a short story or share a takeaway, but the first two lines still decide whether people click "see more".
Keep emoji light, break text into short paragraphs for readability, and close with a question or a "repost to share" CTA to spark comments. LinkedIn captions perform best when they read like a person sharing genuine experience, so edit the generated draft to add a specific detail from your own work.
TikTok captions are short by design — they support context for the video, not a full story. Use the Viral, Trending or Funny mode with a Casual or Witty tone, and write a hook that teases the payoff ("wait for it", "POV:…", "here's the part nobody tells you"). The generator keeps the copy tight and trend-aware.
Calls-to-action like "follow for part 2", "comment a keyword" or "duet this" drive the replies and follows TikTok's algorithm responds to. Pair captions with a small set of specific, discoverable hashtags rather than broad ones, and let the video carry the rest. The same approach works for YouTube Shorts and Instagram Reels.
Hashtags work best as a balanced mix, not a popularity contest. A handful of large trending tags give you a shot at broad reach, mid-size niche tags connect you with an engaged community, and a few specific or branded tags help the right people find you. The generator builds this mix automatically and shows each tag's popularity, competition level and estimated reach.
Choose 5, 10, 20 or 30 hashtags depending on the platform — Instagram and TikTok tolerate more, while X and LinkedIn do better with two or three. Avoid repeating the exact same block on every post, keep tags relevant to the actual content, and rotate in fresh ones over time. Pair the built-in hashtags with the dedicated AI Hashtag Generator when you want to go deeper.
Consistency is what turns scattered posts into a recognizable brand. Open Brand Voice and define your brand name, personality, preferred tone, target audience and industry once, and the generator will weave those signals into the wording, examples and hashtags so every caption sounds like you — whether it is a product launch, a behind-the-scenes moment or a customer testimonial.
For agencies and teams managing multiple accounts, save a brand voice profile per client and switch between them instantly. Combine a defined voice with a fixed platform and content type to produce on-brand captions at scale, then fine-tune the strongest variation before it goes live.