Free tool

Viral Score Estimator

Pressure-test a draft against the signals that actually travel.

Quick answer

No tool can promise a post goes viral, and anyone who claims a hard number is guessing. What you can do is check a draft against the signals that reliably predict reach on X: a strong first line, a reason to reply, a shareable point, and clean formatting. Score your draft against the checklist below. The more boxes it hits honestly, the better its odds. Reach is a probability you improve, not a switch you flip.

What actually drives reach on X

The feed rewards posts that earn fast engagement, especially replies and reposts, in the first stretch after you post. So the signals worth scoring are the ones that make people stop, respond, and pass it on. Everything else is noise.

  • Hook strength. Does the first line stop the scroll on its own?
  • Reply pull. Is there a reason to comment, like a question, a hot take, or a shared frustration?
  • Shareability. Would someone repost this to look smart, helpful, or right?
  • Specificity. Real numbers, real situations, and concrete detail travel further than vague claims.
  • Clean format. Short lines and white space make a post easy to read at a glance.
  • Timing and audience. A post lands better when your engaged followers are actually online.
No honest score is a guarantee
Reach depends on things you do not control, including who happens to see it first and what else is happening that day. Treat any viral score as a way to improve your odds and spot weak drafts, never as a promise.

Score your draft with this checklist

Give your draft one point for each signal it hits honestly. Be strict. The point of the exercise is to catch a weak post before it goes out, not to flatter it.

SignalAsk yourselfPoint
HookWould this first line stop me mid-scroll?1
Reply pullIs there a clear reason to comment?1
ShareableWould someone repost this to their own audience?1
SpecificAre there real numbers or concrete detail?1
ReadableDoes it scan cleanly in one glance?1
TimingAm I posting when my people are online?1
  1. 1
    Score the draft
    Walk the six rows and tally honest points. Five or six is strong. Three or four needs work. Two or fewer, rewrite before posting.
  2. 2
    Fix the lowest signal first
    Find the row you scored zero on and fix that one. A weak hook or no reply pull sinks otherwise good posts.
  3. 3
    Post, then read the feedback
    Compare your predicted score to how the post actually did. Over time you learn which signals matter most for your audience.
High-scoring draft
@example

I spent $4,000 on ads and got 3 signups.

Then I spent $0 replying to 20 people a day and got 60.

The lesson took me way too long to learn:

Strong hook, concrete numbers, an open loop that pulls replies, and clean formatting. This hits most of the checklist.
TweetX does this inside the app
TweetX scores your draft on these signals as you write and flags the weakest one, so you can strengthen a soft hook or add a reply prompt before you post instead of finding out afterward.

Use cases

Deciding what to post

Score two or three drafts and ship the one with the strongest signals instead of guessing.

Rescuing a flat draft

A low score points straight at the weak spot, usually the hook or the lack of a reply reason.

Learning your audience

Track predicted score against real results to see which signals move the needle for your niche.

FAQ

Not with certainty. Reach depends on factors outside your control, like who sees it first. A good estimator checks the signals that improve your odds and flags weak drafts, but no honest score is a guarantee.

Related tools and guides

Grow on X without the guesswork

TweetX writes in your voice, schedules straight to X, and turns your real analytics into a plain do more of this and do less of this.