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Algorithm Audit

Virality Predictor

Will your post go viral? Our algorithm analyzes your hooks, spacing, and sentiment to predict engagement before you hit publish.

Dwell Time Secret

Algorithms prioritize posts that keep users on the app longer. Short, punchy lines with clear breaks increase dwell time by 40%.

Scan your strategy

Paste your caption and select a platform on the left to see your viral potential score.

How the virality score is calculated

Virality isn't luck, it's data. Our predictor analyzes thousands of high-performing posts to identify the patterns that trigger social algorithms in 2026.

Hook Efficiency

We check for "stopping power" words that have been proven to increase initial 3-second retention.

Platform Context

LinkedIn likes professional whitespace; TikTok likes informal energy. We audit against platform-specific norms.

Readability Index

If a post is hard to read on a mobile screen, users scroll away. We measure visual scanability.

CTA Conversion

A post without a goal is a wasted impression. We ensure you have a clear next step for your audience.

Mobile-First Optimization

98% of social media consumption happens on mobile. If your post doesn't look perfect on a 6-inch screen, you're losing 98% of your potential reach.

"PostEverywhere users see a **42% increase in engagement** on average simply by using our spacing and hook recommendations."

How to Use the Viral Score Predictor

1

Select your platform

Choose Instagram, TikTok, LinkedIn, or X so the algorithm audits against platform-specific norms.

2

Paste your caption

Drop your post text into the editor. Include emojis, hashtags, and CTAs exactly as you plan to publish.

3

Get your virality score

Receive an instant score from 0-100 with a detailed audit breakdown and actionable suggestions to improve.

Viral Score Predictor FAQ

How does the Viral Score Predictor work?▾
The predictor analyzes four key dimensions of your post: hook efficiency (stopping power of your opening line), readability and spacing for mobile screens, emoji density relative to platform norms, and call-to-action strength. These are combined into a single virality score.
What score should I aim for?▾
A score above 80% indicates high viral potential. Scores between 60-80% mean your post is solid but could be improved. Below 60% suggests you should rework your hook, spacing, or CTA before publishing.
Is the scoring different for each platform?▾
Yes. LinkedIn rewards professional whitespace and moderate emoji usage, while TikTok favors informal energy and more emojis. The algorithm adjusts its criteria based on the platform you select.
Can I use this for video captions?▾
Absolutely. Paste the caption or script text you plan to use alongside your video. The tool analyzes the text component, which is critical for both search discovery and viewer retention.
What are the most important factors for virality?▾
The opening hook is the single most important factor. Posts with strong hooks (using words like 'secret,' 'stop,' or 'hidden') see significantly higher retention rates. After that, readability and a clear call to action are the next biggest drivers.
Is the Viral Score Predictor free?▾
Yes, it is completely free with unlimited use. No signup or credit card required. Analyze as many posts as you want before publishing.
How is this different from the Caption Analyzer?▾
The Caption Analyzer provides a deeper six-dimension breakdown (length, readability, emotion, CTA, hashtags, hook) with platform-specific length optimization. The Viral Score Predictor focuses specifically on predicting whether a post will achieve above-average reach and engagement.

More Free Tools

Caption Analyzer
Score your captions
Viral Hook Generator
Scroll-stopping hooks
Hashtag Generator
Find trending hashtags
Best Time to Post
Optimal posting times

Done with the tool? Now publish it everywhere.

Write once and schedule to all top platforms from a single dashboard, with a visual calendar and caption generation built into the editor.

  • Instagram
  • TikTok
  • LinkedIn
  • YouTube
  • X
  • Facebook
  • Pinterest
  • Threads
  • Bluesky
  • Discord
  • Telegram
  • WordPress
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