Image SEO Checker

Free, no signup. Audit image SEO signals visible in raw HTML. Rendered dimensions, real LCP, transfer sizes, and AI alt-text generation are shown honestly as unavailable in this tool.

Built by Patrick Stox

Public page URL

Checks run from our server; we fetch the URL you enter and don't keep the results. Anonymous run-level outcome counters may be used for aggregate research; URLs, domains, IPs, and identifiers are never included, and no statistic is released below 100 runs.

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Sample report

Illustrative example — based on the markup shown

<img src="hero.jpg">
<img src="divider.svg" alt="" loading="lazy">
<img src="chart.webp" alt="Quarterly traffic by channel" width="960" height="540">

Review: hero.jpg has no alt attribute.
Observed: divider.svg has empty alt text, which may be correct for decoration.
Observed: chart.webp supplies descriptive alt text and dimensions.
Not evaluated: actual transfer sizes, rendered dimensions, and the page's LCP element.

How to use it

Enter the public URL containing the images you want to review.
Choose Audit images and inspect each evidence-backed raw-HTML check.
Separate missing alt attributes from intentionally empty decorative alt text.
Use a rendered performance test for any item this report marks not evaluated.

What the results mean

A finding reflects only markup visible in the response. Missing attributes and clearly unsupported patterns require attention; observations such as empty alt text need human context. A pass confirms one implemented rule, while not evaluated explicitly means the tool did not request or render enough evidence.

How it works

The checker fetches the public page and parses its raw HTML into a document context. Image-category detectors inspect supported img attributes and ImageObject markup, then return structured severity, summary, and evidence fields. It does not request the image files themselves.

Features

Alt-attribute coverage and image-markup checks.
Loading hints, format clues, and supported ImageObject signals.
Evidence from the page source without uploading image assets.
Explicit not-evaluated output for render- and network-dependent checks.

Limitations

The tool cannot see CSS backgrounds, canvas content, JavaScript-injected images, visual image meaning, file bytes, compression quality, rendered display size, or real performance timing. It cannot write alt text responsibly without seeing and understanding the image in context.

Frequently asked questions

Should every image have descriptive alt text?

Every img element should have an alt attribute, but decorative images should usually use an empty alt value. Informative images need concise text that conveys their purpose in context.

Can this tool identify the Largest Contentful Paint image?

No. Actual LCP requires a rendered performance measurement. This checker reports that check as not evaluated rather than guessing from source order or filename.

Does WebP automatically improve image SEO?

No. A modern format can reduce transfer size, but search visibility also depends on relevance, accessibility, discoverability, surrounding text, and correct page implementation.

Why are CSS background images missing?

The checker reads image signals in raw HTML. It does not fetch stylesheets or render CSS, so background images and JavaScript-inserted images are outside its evidence set.

Next stepContent Gap Analyzer — look up the exact spec and expected values.

Feature requests for Image Seo Checker

Upvote what you want most. New ideas can be submitted from the floating Feedback menu; requests appear here once approved, and the most-wanted rise to the top.

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➕ Request a feature

New requests are reviewed before they appear here.

Tentang alat

Tidak. modern format dapat mengurangi transfer size, tetapi pencarian visibility juga depends pada relevance, accessibility, discoverability, surrounding teks, dan benar halaman implementasi.

Dapat alat identifikasi Largest Contentful Paint image?

Audit publik halaman’s mentah HTML images untuk alt cakupan, memuat petunjuk, formats, dan ImageObject markup.

Fitur

Bagaimana ini berfungsi pemeriksa mengambil publik halaman dan parses mentah-nya HTML menjadi dokumen konteks. Image-kategori detectors periksa supported img attributes dan ImageObject markup, lalu kembali structured severity, summary, dan bukti fields. Ini tidak permintaan image berkas themselves.
Home › Alat › Image SEO Pemeriksa
Publik halaman URL Audit images
Tidak. Sebenarnya LCP memerlukan dirender performance measurement. Ini pemeriksa laporan yang periksa sebagai tidak dievaluasi daripada daripada guessing dari sumber urutan atau filename.
Seharusnya setiap image memiliki descriptive alt teks?

Cara kerja

pemeriksa membaca image sinyal di mentah HTML. Ini tidak ambil stylesheets atau render CSS, so background images dan JavaScript-inserted images adalah outside bukti-nya atur. Gratis, tanpa pendaftaran. Audit image SEO sinyal terlihat di mentah HTML. Dirender dimensions, nyata LCP, transfer sizes, dan AI alt-teks pembuatan adalah ditampilkan honestly sebagai tidak tersedia di alat. Mengapa adalah CSS background images hilang? Batasan Alat ini tidak dapat melihat CSS backgrounds, canvas konten, JavaScript-injected images, visual image arti, berkas byte, compression kualitas, dirender display size, atau nyata performance timing. Ini tidak dapat tulis alt teks responsibly tanpa seeing dan understanding image di konteks.

Batasan

Setiap img element seharusnya memiliki alt attribute, tetapi decorative images seharusnya biasanya gunakan kosong alt nilai. Informative images perlu concise teks yang conveys mereka tujuan di konteks.
Image SEO Pemeriksa
Laporan contoh Illustrative contoh — berdasarkan pada markup ditampilkan Tinjau: hero.jpg tidak memiliki alt attribute. Teramati: divider.svg memiliki kosong alt teks, yang mungkin menjadi benar untuk decoration. Teramati: chart.webp supplies descriptive alt teks dan dimensions. Tidak dievaluasi: sebenarnya transfer sizes, dirender dimensions, dan halaman's LCP element.
Bagaimana untuk gunakan ini Masukkan publik URL containing images Anda inginkan untuk tinjau. Pilih Audit images dan periksa setiap bukti-backed mentah-HTML periksa. Terpisah hilang alt attributes dari dengan sengaja kosong decorative alt teks. Gunakan dirender performance uji untuk apa pun item ini laporan menandai tidak dievaluasi.

Pertanyaan umum

pemeriksa membaca image sinyal di mentah HTML. Ini tidak ambil stylesheets atau render CSS, so background images dan JavaScript-inserted images adalah outside bukti-nya atur.

Gratis, tanpa pendaftaran. Audit image SEO sinyal terlihat di mentah HTML. Dirender dimensions, nyata LCP, transfer sizes, dan AI alt-teks pembuatan adalah ditampilkan honestly sebagai tidak tersedia di alat.

Mengapa adalah CSS background images hilang?

Batasan Alat ini tidak dapat melihat CSS backgrounds, canvas konten, JavaScript-injected images, visual image arti, berkas byte, compression kualitas, dirender display size, atau nyata performance timing. Ini tidak dapat tulis alt teks responsibly tanpa seeing dan understanding image di konteks.

Melakukan WebP secara otomatis improve image SEO?

Arti hasil Temuan reflects hanya markup terlihat di respons. Hilang attributes dan dengan jelas tidak didukung pola require perhatian; pengamatan seperti sebagai kosong alt teks perlu human konteks. lulus confirms satu diterapkan aturan, sementara tidak dievaluasi secara eksplisit berarti alat tidak permintaan atau render cukup bukti.

Tidak dievaluasi di mentah-HTML mode Dirender intrinsic-vs-ditampilkan dimensions dan sebenarnya LCP element require render budget. Transfer-size memeriksa require aset permintaan. AI alt-teks pembuatan tidak diaktifkan di alat. Bandingkan halaman’s dirender image sinyal di Render Gap →

Fitur Alt-attribute cakupan dan image-markup memeriksa. Memuat petunjuk, format clues, dan supported ImageObject sinyal. Bukti dari halaman sumber tanpa uploading image aset. Eksplisit tidak-dievaluasi keluaran untuk render- dan jaringan-dependent memeriksa.