Website Image Extractor — Alt Text, Size & SEO Audit
Pricing
$0.80 / 1,000 image reads
List every image on a web page or site with its real pixel size and file size, alt text and SEO/accessibility flags. Reads only the first bytes of each image: nothing is downloaded or stored. Pay per image, blocked pages are free.
pageUrl
Optional
The page the image was found on (final URL, after redirects).
imageUrl
Optional
Absolute URL of the image, as the page declares it.
finalUrl
Optional
Image URL after redirects. null when the image was not measured.
source
Optional
Where it was found: img · picture · srcset (no src, largest srcset candidate) · lazy-attr:data-src (or data-lazy-src, data-original, data-lazy, data-url) · css-background · og:image · twitter:image.
alt
Optional
Alt text. null = the alt attribute is absent (or not applicable: CSS and meta images); empty string = decorative image.
title
Optional
The title attribute.
declaredWidth
Optional
width attribute in pixels (null when absent or not a pixel value).
declaredHeight
Optional
height attribute in pixels.
naturalWidth
Optional
Real width in pixels, read from the file header (JPEG: EXIF rotation applied).
naturalHeight
Optional
Real height in pixels.
format
Optional
Format from the file's magic bytes: jpeg, png, gif, webp, avif, heic, svg, ico, bmp (or from the content type for jxl/tiff).
contentType
Optional
Content-Type the server sent.
fileSizeBytes
Optional
File size in bytes (null when the server does not say).
sizeSource
Optional
How the size was known: range (Content-Range of a ranged answer) · content-length · body (whole short body counted) · unknown.
srcset
Optional
Candidates of srcset and of elements.
loading
Optional
loading attribute (lazy / eager).
fetchpriority
Optional
fetchpriority attribute.
region
Optional
Nearest header, nav, main, aside or footer around the image; null if none (and for CSS blocks and meta tags).
domIndex
Optional
Position among the images of this page, in document order, starting at 0.
occurrences
Optional
How many times this exact URL appears on the page (the record merges them; their alt/size issues are all kept).
status
Optional
ok (read, charged) · broken (404/410, charged) · unmeasured (could not be read: free).
unmeasuredReason
Optional
Why an image is unmeasured: robots_txt, robots_unreachable, blocked (401/403), rate_limited (429), http_error, timeout, dns, refused, tls, reset, private_address, port, network, incomplete_read, no_dimensions (an image whose pixel size could not be read: delivered, free), too_many_redirects, loop, bad_redirect.
httpStatus
Optional
HTTP status of the image request.
issues
Optional
Flags (declared sizes under 10 px are read as an aspect ratio, so they raise no size flag): ALT_MISSING, ALT_EMPTY, ALT_TOO_LONG, ALT_IS_FILENAME, ALT_EMPTY_IN_LINK, TOO_HEAVY, DIMENSIONS_NOT_DECLARED, DECLARED_MISMATCH, OVERSIZED_FOR_DISPLAY, LEGACY_FORMAT, BROKEN_IMAGE, MIXED_CONTENT, NOT_AN_IMAGE.
charged
Optional
true when this record is a billed event.
checkedAt
Optional
ISO 8601 time the image was checked.
