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Free tools

Free social media tools

Small utilities we built for our own team and opened up to everyone: check caption limits, confirm a video will upload, work out your engagement rate, and pick a posting time that fits your audience.

Last updated: 2026-07-31

Every tool below runs in your browser and covers the 8 networks Postify publishes to: Instagram, Facebook, Threads, LinkedIn, X (Twitter), TikTok, YouTube, and Pinterest. No signup, no credit card, no watermarks on anything you produce.

Free
Character counterCheck caption and character limits for every network as you type.Open tool →
Free
Video size checkerCheck video and image size limits before you post, no upload required.Open tool →
Free
Engagement rate calculatorCalculate your engagement rate and see how you compare to your niche.Open tool →
Free
Best time to postFind the best posting times for your audience and time zone.Open tool →

Tools by platform

Each network has its own limits and rhythms. Jump straight to the version tuned for the platform you are publishing to.

Instagram

Instagram character counterInstagram video size checkerInstagram engagement rate calculatorBest time to post on Instagram

Facebook

Facebook character counterFacebook video size checkerFacebook engagement rate calculatorBest time to post on Facebook

Threads

Threads character counterThreads video size checkerBest time to post on Threads

LinkedIn

LinkedIn character counterLinkedIn video size checkerLinkedIn engagement rate calculatorBest time to post on LinkedIn

X (Twitter)

X (Twitter) character counterX (Twitter) video size checkerX engagement rate calculatorBest time to post on X

TikTok

TikTok character counterTikTok video size checkerTikTok engagement rate calculatorBest time to post on TikTok

YouTube

YouTube character counterYouTube video size checkerYouTube engagement rate calculatorBest time to post on YouTube

Pinterest

Pinterest character counterPinterest video size checkerBest time to post on Pinterest

Need the how-to, not the numbers?

Our platform guides walk through connecting an account, composing, and scheduling on each network.

How to post guidesBlog and comparisons →

Stop checking limits by hand

Postify supports nine platforms in one workflow: plan, schedule, and publish without juggling five different tools.

Start your free trialSee pricing
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