Social Media Caption Analyzer
Choose platform, insert any caption, and get a score with tips to optimize your post.
Settings
Your caption is never stored or sent anywhere. Everything runs locally in your browser.
Your score will appear here
Paste a caption and pick a platform to get started.
Scoring against platform data…
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Platform Best Practices
Keep your text between 150 and 300 characters. On TikTok it's the video that does the work. Use 3 to 5 relevant hashtags. End the caption with a question, to make people engage in the comment section. More comments, more reach from the algorithm.
The first 125 characters is the most important. This is what is shown before they have to tap more. Aim for around 125 to 150 characters. Use 3 to 5 relevant hashtags. On Instagram saves and shares is more important than likes in 2026. You need to give people a reason for them to save the post.
On X there's a limit of 280 characters, but based on our research 70–100 characters is where posts perform best. Short and direct is what works here. Use only 1–2 hashtags. If more is used, the reach drops. If the first line does not catch attention, the rest of the post does not matter.
LinkedIn is different from other platforms. On LinkedIn, longer posts win. Aim for around 1,300 to 1,900 characters, and use line breaks. Big blocks of text gets skipped. The first 125 characters is the most important. Max 5 hashtags.
Short posts is key to drive engagement on Facebook. 40–80 characters gets 66% more engagement than long posts, according to our research. Use 1–3 hashtags if any. Facebook does not use hashtags for reach the way other platforms do.
Short and honest posts is key to success on Threads. 100–280 characters is the sweet spot according to our research. Write like a person, not a brand. Use 2–5 hashtags. Don't use links in the post. If you need to share a link, put it in the comments.
YouTube descriptions are SEO. Go for a caption between 200–500 words. Insert your main keyword in the first sentence. Use 3–5 hashtags. The first 3 hashtags show up above the title. Add timestamps if possible. Always include a CTA in your caption.
How SoMePoster's
Caption Analyzer works
Write a Caption and pick the platform you want to post to. Then click Analyze. The tool goes through your text and matches it with researched data on how to make the post reach most people and move engagement.
Every platform has their own rules. This is why you have the option to choose which platform you want to target. Our Analyzer knows how to adjust the text so it matches the correct platform.
You receive a score from 0-100 based on how close you are to reach the best possible text based on our research. You also get a short list of what is working and what to adjust. With a clear explanation for each one.
What Our Analyzer
Checks
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Caption length
All platforms has their own engagement data. The ideal length based on our research is shown below the text box. -
Opening line
Most platforms only shows 100-140 chars. If the opening line is not catching people's attention. The rest of the caption won't either. -
Engagement
Ending your caption with a question, or something that draws people to make a comment is something our analyzer has focus on. More comments, more reach from the algorithm. -
Hashtags
3 to 5 tags related to the main topic is better than 15 generic tags. LinkedIn cuts reach by 68% if you use more than 5 tags. -
Call-to-action
Telling people what to do next can drive the engagement. One CTA is enough. too many will have the opposit effect. -
Emojis and formatting
1 to 4 emojis can in some cases make captions easier to scan. Line breaks also increase dwell time on LinkedIn and YouTube, which the algorithms track.
Frequently Asked Questions
Everything you need to know about SoMePosters caption AnalyzerWhat are some good questions to ask on social media?
Good social media questions are simple, relatable, and encourage replies. The SoMePoster Caption Analyzer helps you check whether your caption includes strong engagement-driving questions that boost comments.
What are SEO-rich captions?
SEO-rich captions include relevant keywords that improve discoverability across Instagram and search engines. The Caption Analyzer evaluates whether your caption is optimized for visibility and search intent.
What are some cool IG captions?
Cool Instagram captions are authentic, creative, and match your audience’s tone. The Caption Analyzer helps you refine captions so they feel natural while still being engaging.
Can a caption be a question?
Yes. Question-based captions are one of the easiest ways to increase engagement. The SoMePoster Caption Analyzer checks whether your question is strong enough to spark replies.
What is the 5-5-5 rule for social media?
The 5-5-5 rule encourages balanced engagement by interacting with others before expecting engagement back. Strong captions still matter, and the Caption Analyzer helps optimize them.
Is SEO dead or evolving in 2026?
SEO is evolving, not dead. Social platforms now act like search engines, and captions play a big role in discoverability. The Caption Analyzer helps you stay optimized.
What captions attract attention?
Attention-grabbing captions use hooks, curiosity, storytelling, or strong opinions. The SoMePoster Caption Analyzer evaluates how well your caption captures attention.
What are the 4 pillars of SEO?
The 4 pillars of SEO are content, technical SEO, authority, and user experience. In social media, content quality and keyword relevance are especially important.
What are catchy captions?
Catchy captions are short, memorable, and emotionally engaging. The Caption Analyzer helps you improve clarity and engagement so your captions stand out.
What to ask on IG questions?
Ask questions that are easy to answer like preferences, opinions, or “this or that” choices. The Caption Analyzer helps you identify better engagement opportunities.
What are the basic rules of a caption?
A good caption should be clear, relevant, readable, and engaging. The SoMePoster Caption Analyzer helps ensure your caption follows best practices before posting.
What is the 5-3-1 rule on Instagram?
The 5-3-1 rule balances value, engagement, and promotion in content strategy. Strong captions support all three, especially engagement-focused posts.