# TikTok caption generator Describe your video, pick a tone and length, and get three caption drafts that open with a hook, or start from the caption formula and eight templates below. ## Write TikTok captions faster On TikTok the video does most of the work, and the caption has two jobs: give people a reason to keep watching, and tell them what to do next. The generator writes three drafts in the tone and length you pick, and each one opens with a hook line, so you can compare angles instead of starting from an empty box. Choose the one closest to your voice and make it yours: change a word, add a detail only you know, and check names, prices and dates. If the AI part is switched off, the caption formula and the eight templates on this page work the same way. Fill in the brackets with your own details and you have a solid first draft in a minute. ## Tips for better TikTok captions - Lead with the hook. Only the start of a caption shows over the video before it is cut off, so put the reason to watch first. - Add what the video does not say. A caption that repeats the voice-over wastes the space; one line of extra context helps. - Ask for one thing. A single question or prompt gives people an easy reason to comment. - Keep hashtags few and accurate. Tags that describe the video are more useful than a long list of broad ones. - Check the length. Long captions are allowed, but most people read only the first line or two. ## From caption to scheduled video A good caption is half the work. In PostBoost you can write the caption with AI, schedule the video to TikTok and adapt the same idea for Instagram, YouTube and other networks from one calendar. ## How to use 1. Describe what the video shows in a sentence or two. 2. Pick a tone, a length, and whether you want emoji and hashtags. 3. Generate three captions; each one opens with a hook line. 4. Edit the one closest to your voice, then check facts, names and links before posting. ## FAQ ### How long can a TikTok caption be? TikTok's Content Posting API, which PostBoost publishes through, accepts captions of up to 2,200 characters. Every draft from this generator stays within that limit, and hashtags count toward it. ### What makes a good TikTok caption? A first line that gives people a reason to keep watching, a line of context the video does not say out loud, and one clear next step, such as a question for the comments. The formula on this page follows that structure. ### How does the AI TikTok caption generator work? When it is switched on, your description, tone and length are sent to PostBoost and our AI provider, which writes three different drafts for TikTok. The same request returns the cached result, and each visitor gets a few free generations per day, shared with the other AI tools. ### Can I use the captions as they are? Treat them as drafts. AI text can be generic or wrong about details, so edit each caption to match your voice and check every fact before posting. ### Should I put hashtags in a TikTok caption? You can ask for a few hashtags at the end of each caption, or none. Pick tags that describe the video accurately; they count toward the caption length like any other text. ### Why is the generator form not shown? The AI part can be switched off, for example when the monthly free allowance is used up. The caption formula and templates still work, and a free PostBoost account lets you write captions with AI inside the app. ## Related - [TikTok hashtag generator](https://postboost.co/tools/tiktok-hashtag-generator): Pick a niche and get a short, ready-to-copy set of TikTok hashtags, then add suggestions for your exact video. Free, no signup. - [Hook generator for social media posts](https://postboost.co/tools/hook-generator): Pick a hook style, type your topic and copy an opening line for Instagram, TikTok, LinkedIn, X, Threads or Facebook. 83 free templates, no signup. - [Social media character counter](https://postboost.co/tools/social-media-character-counter): Free character counter for X, Threads, Bluesky, Instagram, LinkedIn, TikTok and more. Counts as each network does, live in your browser. - [Social media post checker: check your post before you publish](https://postboost.co/tools/social-media-post-checker): Check a post before posting: character limits, hashtags, media count, video length and see-more cut-offs for X, Instagram, LinkedIn, TikTok and more. - [AI text cleaner: remove em dashes, curly quotes and hidden characters](https://postboost.co/tools/ai-text-cleaner): Remove em dashes, curly quotes, invisible characters and markdown from AI text, and spot phrases like delve. Free, runs in your browser. - [TikTok, Reels and Shorts safe zone checker](https://postboost.co/tools/safe-zone-checker): Check a vertical video frame or image against the TikTok, Instagram Reels and YouTube Shorts safe zones. Overlay the UI areas and download the result. - [AI create](https://postboost.co/features/ai): Get caption ideas in the editor, turn an article or video into a draft for every account, and keep the tone in line with a saved brand voice. - [TikTok Caption Character Limit 2026: 4,000 vs 2,200](https://postboost.co/learn/tiktok-caption-character-limit): TikTok's app takes captions of up to 4,000 characters, but scheduling tools get 2,200 through TikTok's API. What counts, emoji math and how to write one. Last verified: 2026-10-17 ## Sources - [TikTok: Content Posting API, direct post](https://developers.tiktok.com/doc/content-posting-api-reference-direct-post) Canonical: https://postboost.co/tools/tiktok-caption-generator