Invisible Text for Facebook

An invisible character is a real character that shows nothing on screen, which is how a comment that looks completely empty, a name with no last name, or a gap inside a post is made. Copy one here and paste it in.

How to post a blank comment

Press Copy above. One press copies one character.
Open the comment box. On the post you want to comment on.
Paste. Nothing will appear, but the Post or send button should stop being greyed out. That change is your confirmation that something is really in the box.
Post it. The comment appears with no visible text.
Reload the page and look again. This is the step people skip. A comment can look right the moment you post it and be cleaned up by the time anyone else loads the thread.

Why an ordinary space will not do this. The comment box treats a space as nothing and stays disabled, so there is no way to post it. An invisible character is not whitespace, so the box counts it as real text and lets it through — while the reader still sees an empty comment.

Where this works on Facebook, and where it does not

Comments. The most reliable of the lot, and the reason most people come looking.
Posts and captions. Same character, used to hold open a gap between paragraphs when the empty line keeps closing up.
Your name — the hard one. See the section below. It is the strictest field on any site covered here, and not everyone can do it.
Your profile URL — no. Not a limit of the character but of the field: usernames accept only letters, numbers and full stops. Nothing invisible fits that rule, so it is not possible for anyone.

The blank last name, and why it often refuses

Facebook checks your name against a real-name policy as well as a character rule, and it is far fussier than a bio or a comment box. Three things get in the way, and they are worth knowing before you spend an attempt:

Name changes are rate-limited. You get one, then a wait of some weeks before the next. A failed attempt costs you the same as a successful one.
The rules are not the same everywhere. What the name field accepts has varied by country and by account for years. Some people report a blank surname going straight through; others cannot save it at all.
A name can be reviewed after it is saved. Saving it is not the same as keeping it. An account with no visible name is more noticeable than one with a short one.

Because of all three, treat a blank name as the thing you try last, after you have confirmed in a comment that the character survives at all on your account.

If it did not work

Work down this list in order — the first two account for most of it.

Check the paste actually landed. Nothing appears on screen when it works, which looks exactly like a failed paste. Paste it into the detector first and it will tell you whether you are carrying a character at all.
Watch the button, not the box. If Post is still greyed out, nothing went in. That is the fastest signal you have.
Try a different character. Open the chooser in the tool above. Some fields accept one and reject another, and there is no way to know which without trying.
Try the other Facebook. The app and the website do not always treat the same paste the same way. If one refuses, the other is worth a try.
Do not retype it. These characters cannot be typed, only copied. Retyping by hand gives you an ordinary space, which is the thing that gets stripped.

Still stuck? Check whether the character survived — that tool runs the usual tidy-ups against your text and reports which ones changed it.

Common questions

Can I really post a completely empty comment?

Yes, in the sense that nobody sees any text. The comment is not actually empty — it contains one character that happens to show nothing, which is what lets it be posted at all.

Why is the Post button greyed out?

Nothing landed in the box. Either the copy did not take or the paste did not. Copy again and watch the button rather than the box, because the box will look identical either way.

Can I make my last name blank?

Sometimes. It is the strictest field covered on this site, the rules have differed by country and account for years, and name changes are rate-limited, so a failed attempt has a real cost. Confirm the character works in a comment first.

Can I make my profile link blank?

No, and neither can anyone else. Usernames accept only letters, numbers and full stops, so no invisible character fits.

My gap between paragraphs keeps closing up.

Every line you want left empty needs its own character pasted onto it. One character holds open one line, not the whole post.

Will this get my account in trouble?

A blank comment or a spaced-out post is ordinary and very widely done. A name with nothing visible in it is the part that draws attention, because it is checked against a real-name policy. If you are cautious, keep at least one visible character in your name.

Will it still be there next month?

Usually, but nothing here is promised. Facebook changes how it cleans up text without announcing it. If something collapses one day, paste it into the detector to see whether the characters are gone or merely changed.

Doing the same thing elsewhere

Not sure which character to use? The full list explains what each one does.