Facebook will accept a 63,206-character post, but mobile feeds collapse it behind “See more” after roughly ~125 characters — so the cap is a curiosity and the fold is the real limit. Type a name and your post below, and the feed-style card folds your text at that mobile cutoff, with a working “See more” toggle so you can read both versions: the sliver everyone sees, and the full post for people who expand.
The card is a generic, “inspired by” mockup — neutral glyphs, no Facebook logo — and your optional image renders from a local object URL in your browser, never uploaded or stored.
0 / 63,206 characters
Your whole caption fits above the ~125-character “See more” fold.
JPEG, PNG, or WebP, up to 20 MB. Displayed with a local object URL in your browser — never uploaded or stored.
Drawn with the Canvas API in your browser — a simplified card, not a real screenshot.
A generic mockup inspired by the Facebook feed — neutral glyphs, no platform logos. Approximate mobile-feed cutoff — desktop feeds show more (about ~477 characters), and the exact fold shifts with device, surface, and line breaks.
Guide
Facebook’s hard limit is the largest of any major network — long enough for a short story — which is exactly what makes it dangerous: with no technical pressure to be brief, the point sinks. The numbers that should shape your draft are the folds. On mobile, where most Facebook time is spent, posts collapse behind “See more” at roughly ~125 characters; on desktop the fold lands later, around ~477 characters. This card folds at the mobile number deliberately — it’s the stricter test, and the one most of your audience experiences.
Both cutoffs are approximate: line breaks, link previews, and the surface (feed, group, Page) all shift them. Treat the fold as a target zone and put the payoff well above it.
The card’s “See more” toggle works like the real one, so you can audit both reading experiences. Above the fold: does the first sentence carry the offer, the hook, or the question — or is it throat-clearing? Below it: does the expanded post reward the click, or repeat itself? Line breaks count as characters and shorten the visible portion, so a two-line hook can fold earlier than its character count suggests; the live counter and fold status under the textarea track both as you edit.
What the preview deliberately doesn’t do is clone Facebook’s pixels. Fonts, spacing, and chrome vary across app versions and surfaces, so an honest generic mockup beats a confident fake screenshot.
Run the draft through three gates: hook above the ~125-character mobile fold, full text under the 63,206-character cap (the easy part), and — if the post carries an image — a look at the card with the image in place, since the visual competes with your first line for attention. The Download PNG button draws a simplified version of the card with the Canvas API, entirely in your browser, for approvals and content calendars.
Facebook’s enormous allowance is also a cross-posting trap: a Facebook-length draft will be rejected outright by X or Bluesky. SocialKit’s composer shows every network’s limit while you write one post for all 11, so the long version and the short versions ship together, on schedule.
At roughly ~125 characters on mobile and around ~477 on desktop — both approximate, shifting with line breaks, device, and surface. Neither is a published number, which is why the preview marks the fold as approximate.
Because it’s the stricter test and the more common reading experience — most Facebook time is spent on phones. A hook that survives the ~125-character mobile fold clears the ~477-character desktop fold automatically.
63,206 characters — famously large. Posts beyond it are rejected, but in practice the “See more” fold is the limit that decides whether your post gets read.
No. It renders from a local object URL in your browser and never leaves your device — nothing is uploaded, stored, or tracked.
Yes — Download PNG draws a simplified rendition of the card (header, image, folded text) with the Canvas API in your browser. It’s made for approvals, not to pass as a real Facebook screenshot.
€0.00 due today · cancel anytime · 7-day money-back guarantee
SocialKit shows each network’s character limit while you compose one post for all 11 platforms — the caption you just previewed publishes on schedule, with over-limit drafts flagged before they fail.
€0.00 due today · cancel anytime · 7-day money-back guarantee