One caption, every platform's limit
Type once, see where it fits and where it doesn't. Bars turn red when you're over the limit.
135 chars·22 words·1 lines·6s read
Twitter / X (post)
135 / 280
X Premium (long post)
135 / 25,000
TikTok (caption)
135 / 4,000
Instagram (caption)
First 125 chars show before 'more'
135 / 2,200
Instagram (bio)
135 / 150
YouTube (title)
70 chars before truncation on mobile
135 / 100
Over by 35 chars
YouTube (description)
First 157 chars show in search results
135 / 5,000
LinkedIn (post)
135 / 3,000
LinkedIn (headline)
135 / 220
Facebook (post)
Truncated after ~480 chars on desktop
135 / 63,206
Threads (post)
135 / 500
How it works
1
Type or paste your caption
We count chars, words, hashtags, mentions and reading time as you go.
2
Check every platform at a glance
Eleven presets — Twitter, TikTok, IG, YouTube, LinkedIn, Threads, Facebook.
3
Trim where it counts
When a bar turns red, you know exactly how many chars to cut.
Why use Toolstack's Caption Length Checker?
100% private
Your file never leaves your device — everything runs locally in your browser.
Instant
No upload, no queue. The result is ready as soon as your laptop finishes the math.
Free forever
No signup, no credit card, no daily limits for the core features.
Open standards
We use proven open-source libraries — no proprietary lock-in, no shady tracking.