What size should a share image be?

1200 × 630 pixels, at a ratio of 1.91:1. Facebook recommends at least 1200 × 630 and LinkedIn asks for at least 1200 × 627. Keep the file under 600 KB as well: Meta’s docs for WhatsApp previews ask for that, and it’s well under LinkedIn’s 5 MB and Facebook’s 8 MB.

Why does the old image still show after I changed it?

Platforms keep a copy. Facebook stores images by their address, so give a new image a new file name, such as share-2.jpg, and change og:image. Slack keeps a preview for about 30 minutes. To make Facebook read the page again, paste the link into its Sharing Debugger.

Do I need twitter: tags as well as og: tags?

Only twitter:card, which asks X for the card with a large image, and twitter:site if you want to name your account. For the title, description and image, X’s card documentation said it falls back to the og: tags when there are no twitter: versions. Post a test link to be sure. Slack, LinkedIn, Facebook and Messages read the og: tags too.

Why does Google cut my title off at a different length?

Google sets no character limit. It cuts titles and descriptions to fit the width of the screen, so what fits depends on the letters: W and M take more room than i and l. The tool measures your text in pixels at the size desktop results use, which makes it an estimate. Google can also pick other text from the page for a result.

Is my image uploaded anywhere?

No. The image opens in your browser and stays there, and the tool never loads anything from your site. Nothing you type or pick is sent to us or anyone else.

Free tool

Check your link preview before you post.

Fill in the title and description of your page and pick your share image. See how the link looks on Google, X, LinkedIn, Facebook, Slack and in a chat, with checks for length, size and crop, then copy the tags.

It runs in your browser. Nothing you type or pick is sent or stored.

Your page

Page address

The page you’ll share, such as your waitlist page. It goes in og:url and the canonical link.

Title

What the page is, in a few words. It goes in the title tag and og:title. 38 characters.

Description

One or two sentences on what people get. It goes in the meta description and og:description. 128 characters.

Site name

Your product or brand, for og:site_name.

X handle (optional)

Your account on X, such as @yourproduct, for twitter:site.

Share image

Drop an image here, or pick one

Image file

JPG or PNG, ideally 1200 × 630 pixels. It stays in your browser: nothing is uploaded.

Image address (optional)

Where the image will be online, for og:image. The tool never loads it.

Image description

What’s in the image, in a sentence, for og:image:alt.

See the previews ↓

Checks

Title, description and address

Image

Note: Pick your share image to check its size and see it in the previews. It stays in your browser.
Note: The tags use https://yourproduct.com/share-image.jpg for the image. Put the image there, or fill in where it will be online.

Tags for your page’s head

<title>Plan a week of dinners in five minutes</title>
<meta name="description" content="Tell us what you like and what’s in the fridge, and get seven dinners and one shopping list. Join the waitlist for early access.">
<link rel="canonical" href="https://yourproduct.com/">
<meta property="og:type" content="website">
<meta property="og:url" content="https://yourproduct.com/">
<meta property="og:title" content="Plan a week of dinners in five minutes">
<meta property="og:description" content="Tell us what you like and what’s in the fridge, and get seven dinners and one shopping list. Join the waitlist for early access.">
<meta property="og:site_name" content="Your Product">
<meta property="og:image" content="https://yourproduct.com/share-image.jpg">
<meta name="twitter:card" content="summary_large_image">

Paste them inside <head>, in place of any title, description or og: tags the page already has.

In Waitlark

Every project gets a hosted waitlist page with its own title, description and share image, so links look right on X, LinkedIn and in chats.

Hosted pages in Waitlark →What a waitlist page needs →

How the link looks

Close to what each platform shows today. They change their layouts often, so treat these as a guide.

Google search result

Google picks the title and text itself and doesn’t always use yours. It shows no share image here.

How link previews work

When someone shares your link, the platform fetches your page once and reads a few tags in its head: og:title, og:description, og:image andog:url, from the Open Graph protocol. It builds the preview from them and keeps a copy. The tool writes those tags from what you fill in and shows roughly what each platform makes of them.

What each platform asks for

Facebook: At least 1200 × 630 pixels for the best display, 600 × 315 for the large layout and 200 × 200 at least. As close to 1.91:1 as possible, up to 8 MB.Images in link shares
LinkedIn: At least 1200 × 627 pixels, a ratio of 1.91:1, up to 5 MB. Images under 401 pixels wide show as a thumbnail.Make your website shareable
Messages: At least 900 pixels wide; under 150 the image may be left out or shown as an icon. Keep the site name out of og:title.Apple TN3156
WhatsApp: An image under 600 KB, at least 300 pixels wide and no wider than 4:1, and a title, description and address that aren’t empty.Meta’s link preview docs
Slack: Reads Open Graph and Twitter Card tags and keeps a preview for about 30 minutes. No sizes given. Slack robots
Google: No length limit for the title or the description: both are cut to fit the screen.Title links
X: Its developer site no longer describes link cards, so the X preview follows how links look on X today.

Checked in each platform’s own documentation on 28 October 2026.

How the checks work

The title and description are measured in pixels, in Arial at 20 and 14 pixels as in a desktop result, against about 600 and 920 pixels. Both limits are estimates, and on a phone fewer words fit.
The image is checked for size, ratio and file size against the numbers above. The previews crop it to a wide 1.91:1 box, and to a square in the chat bubble.

An image that works everywhere

1200 × 630 pixels, as a JPG or PNG under 600 KB.
Little or no text. Apple advises against text in preview images, because they show at different sizes.
The main subject in the middle, so a square crop still shows it.
A new file name for each new image, so platforms that keep copies pick it up.

After you paste the tags

Look in the source of your page for a second og:image from a theme or plugin. With two, you can’t tell which one a platform will use.
Use full addresses that start with https:// in og:image and og:url.
Send the link to yourself in a chat to see the real preview.

Common questions

What size should a share image be?: 1200 × 630 pixels, at a ratio of 1.91:1. Facebook recommends at least 1200 × 630 and LinkedIn asks for at least 1200 × 627. Keep the file under 600 KB as well: Meta’s docs for WhatsApp previews ask for that, and it’s well under LinkedIn’s 5 MB and Facebook’s 8 MB.
Why does the old image still show after I changed it?: Platforms keep a copy. Facebook stores images by their address, so give a new image a new file name, such as share-2.jpg, and change og:image. Slack keeps a preview for about 30 minutes. To make Facebook read the page again, paste the link into its Sharing Debugger.
Do I need twitter: tags as well as og: tags?: Only twitter:card, which asks X for the card with a large image, and twitter:site if you want to name your account. For the title, description and image, X’s card documentation said it falls back to the og: tags when there are no twitter: versions. Post a test link to be sure. Slack, LinkedIn, Facebook and Messages read the og: tags too.
Why does Google cut my title off at a different length?: Google sets no character limit. It cuts titles and descriptions to fit the width of the screen, so what fits depends on the letters: W and M take more room than i and l. The tool measures your text in pixels at the size desktop results use, which makes it an estimate. Google can also pick other text from the page for a result.
Is my image uploaded anywhere?: No. The image opens in your browser and stays there, and the tool never loads anything from your site. Nothing you type or pick is sent to us or anyone else.

Another question? Chat with us.

Read and try next

Hosted pagesA waitlist page per project, in your brand, live in minutes.Branded formsSet your brand once in the brand studio. The form, page, emails and every other screen follow.Custom domainsPut the hosted page on join.yourproduct.com, with HTTPS handled for you.GuideLanding pageWhat a waitlist landing page needs: a clear headline, one promise, a short form, proof you can back up and what happens next. Plus what to leave out.GuideBuild a waitlistHow to set up a waitlist before you launch: write the promise, put up one page, keep the signup short, send the first emails and plan launch day early.Free toolWaitlist growth calculatorSee how a waitlist grows with referrals, week by week until launch, with double opt-in and the viral coefficient (K).Free toolUTM link builderTag the links you share for a launch: presets for six launch channels, clean lower-case values and a copy button.Free toolLaunch email templatesThe four waitlist emails with your product, name and launch date filled in: confirmation, welcome, update and invite, in plain text and HTML.Free toolLaunch countdown generatorA countdown timer for your launch page: date, time zone, words and colours with a contrast check, as one snippet with no external files.Free toolEmail list cleanerFind invalid, duplicate, mistyped and disposable addresses in a pasted list or a CSV, and download the clean list. Nothing is uploaded.

Early access

Early birds get in first.

Join the waitlist for Waitlark. We invite people in small groups, and waitlist members get the early-bird price.

One email to confirm, one when your invite is ready. Unsubscribe in one click. What we store.