HTML Tools

Escape and compress HTML, format markup, and convert between HTML and other formats.

25 tools available, all running locally in your browser.

HTML Charset Detect
Detect charset from HTML meta tag.
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HTML Compression Ratio
Measure how much of an HTML document is whitespace: original size vs whitespace-stripped size, with the reduction percentage. Sizes are counted in UTF-16 code units, so CJK text and emoji report smaller numbers than their real UTF-8 byte size.
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HTML Decode Attribute
Decode HTML attribute entities.
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HTML Decode JS
Decode JavaScript from HTML script embedding.
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HTML Diff
Compare two HTML snippets line by line.
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HTML Doctype Check
Check if HTML has a valid DOCTYPE.
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HTML Encode Attribute
Encode text for safe use in HTML attributes.
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HTML Encode JS
Escape '</script>' occurrences in JavaScript so the code can be inlined in an HTML <script> block. Only the exact '</script>' spelling is rewritten — look-alikes such as '</script >' (with a space) pass through unescaped.
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HTML Escape CSS
Escape CSS content for HTML style blocks.
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HTML Extract Images
Extract all image src URLs from HTML.
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HTML Extract Links
Extract href values from HTML, one per line. Only quoted href="..." attributes are matched — unquoted href=x attributes are not detected.
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HTML Extract Meta
Extract all meta tag content from HTML.
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HTML Extract Tables
Extract HTML tables as JSON.
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HTML Extract Text
Extract all text content from HTML.
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HTML Format
Pretty-print HTML with proper indentation.
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HTML Fragment Parse
Parse HTML fragment into tags and text nodes.
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HTML Lint
Lint HTML for common issues.
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HTML Merge
Merge two HTML snippets.
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HTML Sanitize
Sanitize HTML with tag/attribute/URI whitelists (removes scripts, event handlers, unsafe URIs).
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HTML Template Compile
Compile HTML template with {{variable}} placeholders.
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HTML to PDF (Info)
Generate print-friendly HTML with @media print rules.
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HTML to Svelte Wrapper
Wrap HTML markup in a Svelte component skeleton (empty <script lang="ts"> and <style> blocks). No attribute or event-handler translation happens — your markup is pasted through unchanged.
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HTML to Text
Strip HTML tags and extract plain text.
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HTML Unescape CSS
Unescape CSS content from HTML embedding.
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HTML Validate
Validate HTML by checking tag balance: every opened tag must be closed. Tags inside comments are counted as real tags, so commented-out markup like  is reported as an unclosed tag.
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