QuickATools

Creators · Free browser tool

Hashtag & Caption Length Checker

Check caption lengths, count hashtags, and optimize social media posts for Instagram, TikTok, and YouTube instantly.

Caption

Write once, check against every platform's limits at once.

Characters: 0
No spaces: 0
Lines: 0
Hashtags: 0 (0 unique)

Detected hashtags

No hashtags detected yet — try adding a few, e.g. #travel.

Quality beats quantity: a handful of relevant hashtags usually out-performs stuffing dozens into a caption.

Instagram
Within limits
Characters0 / 2,200
Hashtags0 / 30

Feed preview before "more"

Your caption preview will appear here.

Captions with more than 30 hashtags can fail to post. Feed view also truncates behind a “more” link after ~125 characters.

TikTok
Within limits
Characters0 / 4,000
Hashtags (no hard limit)0

No official hashtag limit, but stacking more than ~20 tags hurts readability and can look spammy.

YouTube (Shorts & Video)
Within limits
Characters0 / 5,000
Hashtags0 / 60

Only the first 3 hashtags above the title display as clickable tags. Anything past 60 total is ignored entirely.

X (Twitter)
Within limits
Characters0 / 280
Hashtags (no hard limit)0

280-character limit applies without X Premium's extended posts. Keep hashtags to 1–2 for best engagement.

Frequently Asked Questions

How many hashtags should I actually use per platform?

Instagram technically allows up to 30 hashtags per caption, but most creators and studies point to 3–8 highly relevant tags performing as well or better than a full 30—more than that often reads as spam. TikTok and X have no hard hashtag limit, so 2–5 well-chosen tags are usually plenty. YouTube allows up to 60 hashtags on a video, but only the first 3 above the title actually display as clickable tags; anything past 60 is ignored entirely.

What are the exact character limits for each platform?

Instagram captions max out at 2,200 characters. TikTok captions allow up to 4,000 characters. YouTube video descriptions (including Shorts) allow up to 5,000 characters. X (Twitter) without X Premium is limited to 280 characters per post. This tool checks your caption against all four limits at once.

What is the Instagram 'more' cutoff, and why does it matter?

Instagram's feed only shows roughly the first 125 characters of a caption before collapsing the rest behind a 'more' link. Put your hook, key message, or call-to-action in that first 125 characters—everything after it requires an extra tap to read, and most viewers won't bother.

Is my caption text uploaded or stored anywhere?

No. Every character count, hashtag extraction, and limit check runs locally in your browser as you type. Nothing is saved or transmitted—copy your finished caption directly into the platform when you're ready to post.

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Caption Length & Hashtag Limits by Platform: What Actually Gets Read

Every platform enforces its own caption length and hashtag rules, and writing one caption for all of them means designing for the strictest limit. Instagram allows up to 2,200 characters and 30 hashtags, TikTok stretches to 4,000 characters with no hard hashtag cap, YouTube video descriptions (including Shorts) allow up to 5,000 characters and 60 hashtags, and X (Twitter) without Premium caps out at just 280 characters. This checker runs your caption against all four at once so you can see exactly where it needs trimming.

Length isn't the only thing that matters—visibility does too. Instagram's feed collapses captions behind a "more" link after roughly the first 125 characters, so your hook, key message, or call-to-action needs to land before that cutoff or most viewers will never see it. YouTube only displays the first 3 hashtags above your title as clickable tags, and silently ignores anything past 60 total— stuffing more in does nothing but clutter your description.

Hashtag quantity is a common trap: Instagram's 30-tag ceiling doesn't mean you should use all 30. Most well-performing posts stick to 3–8 highly relevant tags—a wall of generic hashtags reads as spam to both viewers and, in some cases, the algorithm itself. Use the hashtag badges below the editor to sanity-check what you've actually written before you post.

Pair this with the Instagram & TikTok Engagement Rate Calculator to see how your posting habits translate into engagement, or use the YouTube Title & Description Length Checker when you're optimizing the video itself rather than a social caption. This free tool runs entirely in your browser—your caption text is never uploaded to a server.