✳ VALIDATOR · SUBTITLE

Subtitle validator

Pick an SRT or VTT subtitle file. Get character and duration warnings against the platform's caption rules.

TikTok

2,200 char limit

Instagram Reels

2,200 char limit

Instagram Feed

validates container + size + duration

Instagram Stories

validates container + size + duration

YouTube Shorts

100 char limit

YouTube (long-form)

validates container + size + duration

LinkedIn

700 char limit

LinkedIn Pulse

validates container + size + duration

Pinterest

validates container + size + duration

Pinterest Video Pin

validates container + size + duration

X (Twitter)

280 char limit

Facebook Reels

validates container + size + duration

Facebook Feed

validates container + size + duration

Snapchat

validates container + size + duration

Snapchat Spotlight

validates container + size + duration

Snapchat Story

validates container + size + duration

Threads

validates container + size + duration

Meta Threads

validates container + size + duration

Twitch

validates container + size + duration

Twitch Clip

validates container + size + duration

Bluesky

validates container + size + duration

Mastodon

validates container + size + duration

Reddit

validates container + size + duration

Spotify Canvas

validates container + size + duration

Apple Podcasts

validates container + size + duration

Podcasts App

validates container + size + duration

Substack

validates container + size + duration

Discord

validates container + size + duration

Telegram

validates container + size + duration

WeChat

validates container + size + duration

Weibo

validates container + size + duration

Douyin

validates container + size + duration

Red Note (Xiaohongshu)

validates container + size + duration

Quora

validates container + size + duration

Medium

validates container + size + duration

Tumblr

validates container + size + duration

Rutube

validates container + size + duration

VK

validates container + size + duration

Yappy

validates container + size + duration

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