Small tools that run in your browser. No sign-up, and nothing you type is sent to us.
See a caption's length against seven networks at once, with X's weighted counting, hashtag and @ tag checks.
Calculate engagement rate by impressions, reach or followers, with the formula shown.
Build tagged links with utm_source, utm_medium and utm_campaign; encoded correctly, with a copy button.
Each tool page documents exactly how it calculates, with links to the networks’ own documentation where a limit comes from them.
10 questions
Yes. No sign-up, no e-mail address and no trial: open a tool and use it.
No. The tools run in your browser and nothing you type is sent to us.
A character counter for seven networks, an engagement rate calculator and a UTM link builder.
X, Instagram, TikTok and YouTube publish their limits in their developer documentation, which each tool page links to. For LinkedIn, Facebook and Pinterest we found no current official reference, so we use the limits PostRoost's composer enforces and label them.
No. The tools work for anyone, whichever scheduler you use.
Yes. Copy the counts, rates or links into your own documents and reports.
The engagement rate calculator does: press Calculate and the page shows the result. The counter and UTM builder need JavaScript to update as you type.
Yes. The composer's per-network tabs use the same limits as the character counter and update as you type.
Engagements (likes and reactions, comments, shares and saves) divided by impressions. The calculator lets you divide by reach or followers too.
Tell us which network and where you saw the different limit. We check the network's documentation and correct the tool.
Start on the Free plan with one client. Upgrade when you need approvals, more people or more clients.
Moving an agency to a new scheduler is mostly about not losing anything and not posting anything twice. A step-by-step checklist from inventory to cut-over to cancelling the old tool.
Read more: Switching social media schedulers: a migration checklist for agenciesMost monthly social reports are exported charts nobody opens twice. A structure for a one-page report that answers the client's question, explains the numbers and ends with decisions.
Read more: How to write a monthly social media report clients actually readAI can draft a caption in seconds, but someone still signs it off. A practical checklist for reviewing AI-assisted social posts: facts, claims, voice, per-network fit and accessibility.
Read more: Reviewing AI-written captions: a checklist before anything is approved
