She’s as beautiful on the inside as she is on the outside” is that ok?

This is absolutely enough. It’s her birthday, she’s not been voted in as prime minister, or won the Nobel peace prize, long lyrical paragraphs on social media are cheesy and cringe.

I think it's a lovely post. I've had the same posted for myself and I appreciated it.
There is nothing wrong with acknowledging and celebrating beauty. Yes, it's not everything but neither is intelligence or any personality trait. I do think people who get wound up about us praising beauty are probably just insecure about their own looks.

Yes. What does ‘beautiful on the inside’ actually mean? If it means she is kind, loyal, compassionate, loving, a wonderful friend, resilient in the face of adversity - that’s wonderful. And it is also what you say. Otherwise it is a meaningless compliment that means well, but says nothing.

As others say, if you labour the fact that she is beautiful (and I am 100% sure OP’s daughter is) then that becomes core to her sense of identity and how she values herself - and how she thinks others will value her. And if she loses it [gains weight after pregnancy, develops acne in her 20’s, loses her looks for any reason, including aging], then her self-image will be shattered. It’s totally fine to tell your child they are beautiful to you, but it needs to be bracketed by telling them you are proud of them for who they are, what they’ve achieved, for the work they’ve put into achieving their goals. For the less transient qualities.

Embarrassingly I watched an episode of Dr Phil on this, probably before I even had kids, and he laboured this. For some reason it stuck with me.

I even would not put my kids sm profiles for all to see but to each their own
If you believe your daughter is as beautiful outside as she is inside, post it. Your choice really

Put whatever you think, OP. Of course parents love and are proud of and want to celebrate their kids. I hope she has a lovely birthday.

I do the exact same thing. Close friends and family get the occasional pic. Random internet strangers and acquaintances, no. I actually judge the people who do this quite negatively.

Back when I used to use Social media some old woman posted a selfie of her very average looking 21ish year old Granddaughter with lots of makeup on saying something like "We do make some beauties". Had to unfriend 🤣 I may have even written "Why are you objectifying your Granddaughter you utter weirdo?"

I’ve just had a friend write about her daughter saying “So proud of my fierce, genuine, and utterly amazing daughter — one of a kind in every way. Her strength, kindness, and spirit light up every room she walks into. 💖✨”
I thought that was quite nice.

Vapid trite quotes. As long as the child is "beautiful" that's all that matters. As long as the parent is seen as a 'good parent' by social media acquaintances that's all that matters, what people see. Also, what if she didn't look beautiful? What happens when she gets old and ugly and fat, will she still be worthy of love?

But putting huge emphasis on beauty just means when she gets say closer to 40 she will struggle more to cope with ageing.
Maybe just say Happy Birthday or make a comment about how proud you are. Or have a great day type thing.
It does sound sorta desperate in a weird way.

How strange why don't you just put a nice message in a birthday card or is it for everybody else's benefit

Agreed - by all means send a personal card to your child telling them how you feel, but posting on SM? As a couple DH & I agreed that we would never post images or information on SM regarding our children as they could not consent to that data/those images being on the web for eternity.

My friends and acquaintances have no need to know it is my DC’s birthday/graduation/exam success day/prom night. I have no need to brag. Those milestones and achievements are theirs, not mine. I will tell close friends and share pics with family. That’s all.

But I do appreciate I am probably strange about this stuff!

Get you as I’m a mother, but I won’t be posting on Sm when mine turn 18 (soon).

My teens have their own SM and will have comments from their friends. If I post on Fb or SM it’s just really cringey and would totally be for me - I don’t need the kudos.

No way does my teen want my random Fb friends sending trite messages! Their own friends and family will message them and/or see them, themselves! I think it’s just very needy for parents to post stuff like this.

I’m probably in the minority, but that’s my honest opinion.

She’s as beautiful on the inside as she is on the outside

It does suggest that beauty is the biggest comparator, because you’re comparing her inside to her exterior beauty.

However, most people will skim read it, they won’t think any of it.

How about sending her a card and writing in that what you think of her instead of wanting a showy post to all and sundry? Just post a few pics of her & say she's18 today

I think it’s a lovely thing to say. Of course it’s alright.

I haven't mentioned my kids birthdays on SM since they were at primary school because they'd be mortified if I did.

First off what is your daughter virw
on Facebook posts - my 16 year olds view is that I have spent years explaining to her how social media works and what you should and shouldn’t put on it that she doesn’t want to be on mine with it going to people she has never met and on a platform she never uses

secondly mine is also very beautiful and bright but that isn’t what she is to me, she is the one I love unconditionally so those attributes don’t matter the one whom I will always protect and be proud off no matter what happens or what she does

there are many other attributes (some good some bad) that define her far more than her looks and intelligence

You absolute trendsetter 🤣

Put what you like op. It comes from your heart and that's all that matters.

Write whatever you think your daughter would want to read.

Sorry but mega cringe! When I see posts like this I do wonder at the necessity to overshow love for others to see for adoring affirmation. Keep it simple, you can actually tell her or write in her card. Xx

In summary
Your cards are heartfelt (twice) and their physicality & sentiment is profound
And Anything on social media or public forum is naff and performative. For the vulgar hoi polloi
Good to know. Thanks for that,Mrs Middleton

OP, my darling daughter recently turned 18, I really wouldn't dream of doing this.
I don't do SM, and have encouraged my children to keep their lives private.
We had a party at home, I wrote her a heartfelt card, as did her father.
I think public postings are naff and performative.