Every check

67 problems the API and the social card preview report, by level.

Errors

crawler.refused-everywhere: Page refused to the API's crawler and to every probed user agent that answered
crawler.refused-partial: Page refused to the API's crawler and to one probed user agent
format.unsupported: Image format is not PNG, JPEG or GIF
image.bad-scheme: Image URL uses a scheme other than http or https
image.http-error: Image URL returns an HTTP error
image.missing: og:image is missing
image.refused-everywhere: Image refused to the API's crawler, probe refused
image.refused-unprobed: Image refused to the API's crawler, probe incomplete
image.twitter-only: Image is set only by a twitter: tag
title.missing: Title is missing

Warnings

aspect.off-target: Image aspect ratio is off the card's crop target
bytes.over-x-limit: Image is over 5 MB
card.missing: twitter:card is missing
card.summary-with-large-image: twitter:card is summary with a large image
crawler.refused-allowlisted: Page refused to the API's crawler and served to the probed user agents
crawler.refused-unprobed: Page refused to the API's crawler, probes incomplete
declared-size.mismatch: Declared image size does not match the image
declared-size.unusable: og:image:width or og:image:height is not a usable number
description.long: Description is long
description.missing: Description is missing
description.twitter-only: Description comes from twitter:description
description.very-long: Description is far too long
head.truncated: <head> is longer than the part that was read
image.below-1200: Image is narrower than 1200 px
image.expiring: Image URL is signed
image.insecure: Image is served over http
image.not-an-image: Image URL does not serve an image
image.refused-allowlisted: Image refused to the API's crawler, probe served
image.relative: Image URL is relative
image.several: More than one og:image tag
image.slow: Image is slow to download
image.too-small: Image is smaller than 600 × 315 px
image.transparent: Image is partly see-through
image.unloadable: Image URL could not be loaded
image.unreachable: Image URL could not be reached
images-differ.other-broken: Image in twitter:image is a different file and does not load
meta-refresh: Page is a meta refresh
robots.image-blocked: Image disallowed by robots.txt
robots.image-blocked-undocumented: Image disallowed by robots.txt to crawlers with undocumented handling
robots.noindex: Robots meta tag with noindex, or an X-Robots-Tag header
text.double-escaped: Card text is escaped twice
title.long: Title is longer than 60 characters
title.twitter-only: Title comes from twitter:title
type.missing: og:type is missing
ua-diff.crawler-starved: Copy served to the API's crawler has fewer values than the browser's
url.missing: og:url is missing
url.other-host: og:url is on a different host

Tips

aspect.over-whatsapp-max: Image is wider than 4:1
author.missing: <meta name="author"> is missing
bytes.over-whatsapp: Image is over 600 KB
crop.detail-at-edge: Image has detail outside the square crop
crop.wide: Image is wide for a square crop
declared-size.missing: og:image:width or og:image:height is missing
description.meta-only: Description comes only from <meta name="description">
description.short: Description is short
description.under-linkedin-min: Description is under 100 characters
format.avif: Image is AVIF
format.webp: Image is WebP
head.card-late: Card tags start late in the page
image-alt.missing: og:image:alt is missing
image.transparent-declared: Image may be transparent
image.unversioned: Image URL is unversioned
images-differ.both-ok: Image in twitter:image is a different file
site-name.missing: og:site_name is missing
title-description.identical: Title and description are identical
ua-diff.crawler-richer: Crawler's copy differs from the browser's
url.other-path: og:url points to a different page