Does it check if the alt text is actually good, or just present?

It flags images with missing alt text — judging whether existing alt text is descriptive and accurate still needs a human read-through.

Should decorative images have alt text too?

Purely decorative images should have an empty alt attribute (alt="") rather than no attribute at all, which tells screen readers to skip them appropriately.

Can I check an entire page, or just a snippet of HTML?

Paste as much or as little HTML as you want checked — a full page or just a specific section.

Does Alt Text Bulk Checker upload my files to a server?

No. Alt Text Bulk Checker runs entirely in your browser using on-device processing, your files never leave your device.

Alt Text Bulk Checker

Scan pasted HTML for images missing alt text.

Runs in your browser

HTML source

About this tool

Images missing alt text hurt both accessibility (screen reader users get no description of the image) and SEO (search engines can't understand what an undescribed image shows), but scanning a page's HTML by eye to find every missing instance is slow and error-prone on a content-heavy page. This tool scans pasted HTML and flags every image missing alt text, surfacing every gap in one pass instead of manually checking each image tag.

Frequently asked questions

Meta Tag Generator

Generate title, description, Open Graph and Twitter Card meta tags.

SERP Preview

Preview how your page will look in Google search results.

Open Graph & Twitter Card Preview

Preview how a link will look when shared on Facebook, LinkedIn and X.

Robots.txt Generator

Generate a robots.txt file to control search engine crawling.

Sitemap Generator

Generate an XML sitemap from a list of page URLs.

Schema Markup Generator

Generate JSON-LD structured data for FAQs, products, articles and more.

JSON-LD Validator

Check JSON-LD structured data for common errors.

Web Manifest Generator

Generate a web app manifest.webmanifest file.

Meta Title & Description Checker

Check whether your title and meta description fit Google's recommended length.

Canonical URL Checker

Check a page's HTML for a missing, duplicate, or mismatched canonical tag.

Aspect Ratio Calculator

Simplify an aspect ratio and scale dimensions to a target width or height.

Keyword Density Checker

Find how often each word appears in your content, as a percentage.

PDF Tools

Merge, split, compress and convert PDF files.

Image Tools

Compress, resize, crop and convert images.

Link & QR Tools

Shorten links and generate QR codes and barcodes.

Audio Tools

Convert audio files and turn text into speech, or speech into text.

Video Tools

Compress and process video files, right in your browser.

Developer Tools

JSON, encoding, hashing and text utilities for developers.

Data & Spreadsheet Tools

Clean, convert and inspect CSV, TSV and tabular data.

File Tools

Archive, inspect and convert files, right in your browser.

Business Tools

Invoices, quotations, receipts and other business documents.

Social Media Tools

Resize images for social platforms, count hashtags and preview posts.