Caption limits for every platform,plus a live checker.
Every platform caps your caption, counts your hashtags, and quietly hides everything past a 'more' link most readers never tap. Pick a platform and paste your caption: this checks the character count against the hard limit, counts your hashtags against the cap, and flags the exact point where the feed truncates so your hook never gets buried.
Your caption
Feed collapses the caption after ~125 characters — front-load the hook. Up to 30 hashtags allowed, but 3–5 relevant ones outperform a wall of tags.
The read
Characters
194 / 2,200
Truncates ~125
Hashtags
3 / 30
Recommended ~5
Signal by signal
Within the character cap
194 of 2,200 characters — 2,006 to spare.
Past the truncation point
Instagram collapses the caption after ~125 characters behind 'more'. Your last 69 characters are hidden by default — move the hook and CTA above character 125.
Hashtag count looks healthy
3 hashtags — at or under the recommended ~5 for Instagram.
Your move
Fitting the limit is table stakes. A caption that converts is the work.
194 chars, 3 hashtags — needs a trim Instagram's limits.
Knowing the cap won't write the hook that stops the scroll or the offer that earns the tap. I build the content, captions, and creative that actually move people — sized right for every placement. If your posts fit the limits but don't perform, book the call and I'll show you, free, what I'd change.
Plain English
The cap isn't the problem. The truncation is.
Every social platform sets two separate limits on a post: a hard character cap (paste more and it simply won't publish) and a much shorter truncation point (where the feed collapses your caption behind '...more'). The cap is generous — Instagram allows 2,200 characters, TikTok 4,000, Facebook over 63,000. Almost nobody hits it. The number that actually decides whether your caption gets read is the truncation point, and it's brutally short.
Instagram shows roughly 125 characters before the fold. LinkedIn collapses after about 210. YouTube descriptions reveal only the first ~157. That means the first sentence — often the first line — is doing all the work. Everything after the 'more' link is read by a small fraction of your audience, so the hook, the offer, and any context that earns the tap have to live up top.
Hashtags are the other lever, and more is not better. Instagram permits up to 30, but 3–5 relevant tags consistently outperform a block of 30 — the wall signals spam and dilutes relevance. On X, one or two hashtags lift reach while three or more depress it. This tool pairs the current limits for every major platform with a live checker so you can size a caption to the cap, count your hashtags against the recommendation, and see exactly where the platform will cut you off.
The formula
Readable caption = hook before the truncation point + body under the cap + 3–5 relevant hashtags
An Instagram caption of 600 characters publishes fine (cap is 2,200) — but only the first ~125 show in the feed. If your call to action sits at character 400, most readers never see it. Move the hook and the ask before character 125, and keep hashtags to 3–5 instead of maxing out at 30.
The limits, platform by platform
The hard caption cap and the hashtag limit for each major platform. The cap is what publishes; the truncation point (in the lookup above) is what gets read. Use the checker to size your caption, then keep these in your head:
| Platform | Caption limit | Hashtag limit |
|---|---|---|
| 2,200 chars | 30 max | |
| TikTok | 4,000 chars | No cap (~4 ideal) |
| X (Twitter) | 280 chars | No cap (~2 ideal) |
| 3,000 chars | No cap (~3 ideal) | |
| 63,206 chars | No cap (~2 ideal) | |
| YouTube | 5,000 chars | 15 max |
| 500 chars | No cap (~4 ideal) |
Source: Sociality.io social media character limits, 2025 · 2025
Your caption isn't landing. Here's why.
Hook sits past the truncation point.
On Instagram (~125 chars) and LinkedIn (~210), anything after the fold is hidden behind 'more'. Move your hook, offer, and CTA to the first line so they show without a tap.
You're using 20–30 hashtags.
Maxing the hashtag limit reads as spam and dilutes relevance. Cut to 3–5 specific, on-topic tags. Reach comes from relevance, not volume.
Caption exceeds the hard cap.
It simply won't publish, or gets cut mid-word. Trim to the platform's character limit — and remember hashtags count toward that total on TikTok and X.
Same caption copy-pasted across platforms.
A 280-character X post and a 3,000-character LinkedIn post are different formats. Size and structure each caption to the platform's cap and truncation point, don't recycle one length everywhere.
Hashtags counted toward your limit unexpectedly.
On X and TikTok, hashtags eat the same character budget as the caption. A long tag list shrinks the words you have left — count the whole thing.
How to write captions that don't get cut
01Front-load the hook
Put the most compelling line first. On most feeds only the first ~125–210 characters show before 'more', so the opener has to earn the tap on its own.
02Keep hashtags to 3–5
Relevant beats plentiful. A handful of specific tags outperforms a block of 30 on Instagram and tanks engagement on X past two.
03Mind the hidden character cost
On X and TikTok, hashtags and links count against your character limit. Budget for them so your caption doesn't get squeezed.
04Size per platform, not once
Don't paste a LinkedIn essay into X. Tailor caption length to each platform's cap and truncation point — the checker shows both.
05Put the CTA above the fold
If the action you want lives after the 'more' link, most readers never see it. Move the ask up top where it shows by default.
06Use line breaks for scannability
Within the cap, short lines and white space make long captions readable on LinkedIn and Instagram — a wall of text loses people even when it fits.
The vocabulary
- Character limit (cap)
- The maximum number of characters a platform will publish in a caption or post. Exceed it and the post won't go live.
- Truncation point
- Where the feed collapses your caption behind a 'more' link. Far shorter than the cap — it's what decides whether your hook gets read.
- Hashtag limit
- The maximum number of hashtags a platform allows on a post (Instagram caps at 30; many platforms have no hard cap).
- Above the fold
- The portion of a caption visible before the reader has to tap 'more'. Where your hook, offer, and CTA should live.
- Bio limit
- The character cap on your profile bio or about section — a separate, much tighter limit than post captions.
Caption & hashtag questions, straight answers
2,200 characters is the hard cap, but the feed truncates the caption after roughly 125 characters behind a 'more' link. So while you can write a long caption, only the first ~125 characters show by default — put your hook and call to action there. Instagram also allows up to 30 hashtags, though 3–5 relevant ones perform better.
A calculator tells you what. A call tells you what to do about it.
Send me the account behind these numbers. I'll tell you straight where the money's leaking and what I'd fix first — free, and you keep it whether you hire me or not.