v2
latestOpenAPI 3.1.02026-08-075421692.0 MBValidate
Validate character count
Check weighted character count per platform and whether the text is within each platform's limit.
Twitter/X uses weighted counting (URLs = 23 chars via t.co, emojis = 2 chars). All other platforms use plain character length.
Returns counts and limits for all 15 supported platform variants.
post/v1/tools/validate/post-length
Request body
Example request
{
"text": "Check out https://zernio.com for scheduling posts!"
}Response
Character counts per platform
Example response
{
"platforms": {
"twitter": {
"count": 51,
"limit": 280,
"valid": true
},
"twitterPremium": {
"count": 51,
"limit": 25000,
"valid": true
},
"instagram": {
"count": 51,
"limit": 2200,
"valid": true
},
"bluesky": {
"count": 51,
"limit": 300,
"valid": true
},
"snapchat": {
"count": 51,
"limit": 160,
"valid": true
}
}
}