HTML Viewer
Preview pasted HTML via POST /web-tools/ViewHtml on Toolomix—server-side sanitization, metadata extraction, and warnings. HTML is sent to Toolomix; not browser-only.
Validation Warnings
Tips
HTML is sent to Toolomix
ViewHtml runs on the server. Your pasted markup is uploaded for sanitization and preview.
Review what was removed
Compare original and sanitized HTML, and read validation warnings for missing doctype, lang, or alt text.
Not production sanitization alone
Use this for quick inspection. For user-facing apps, rely on a dedicated server-side sanitizer in your own stack.
Check metadata tags
Title and meta description are extracted when present in the pasted HTML.
ViewHtml on the server
POSTs your HTML to /web-tools/ViewHtml and returns sanitized content plus stats.
Server-side sanitization
Strips risky elements such as scripts, iframes, and common event-handler attributes before preview.
Metadata and warnings
Shows extracted title/description and validation warnings when applicable.
What this tool does
HTML Viewer lets you paste markup and inspect a sanitized preview returned by Toolomix.
It also reports size stats, extracted title/description, and validation warnings when found.
How to use
Paste your HTML
Add the markup you want to inspect into the input field.
Run View HTML
Submit so Toolomix can sanitize and process the content via ViewHtml.
Review preview and metadata
Check the sanitized preview, title/description, sizes, and warnings.
Compare versions
Inspect original vs sanitized HTML to see what was removed or changed.
Supported inputs and output
Input: pasted HTML text (primary workflow).
Output: sanitized HTML, original HTML, size comparison, extracted title/description, and validation warnings.
Processing and privacy
Your HTML is sent to Toolomix with POST /web-tools/ViewHtml. Sanitization and preview preparation run on the server—not only in the browser.
See the Privacy Policy for how requests and logs are handled.
Limitations
Known limits
- Not browser-only—HTML is uploaded to Toolomix
- Sanitization is best-effort for preview, not a full XSS product guarantee
- Requires a successful ViewHtml response
- Primary input is pasted text, not a multi-file upload IDE
- External assets in previews may still behave differently than on a live site
Troubleshooting
If processing fails, ensure the input is not empty and retry ViewHtml.
If the preview looks empty, check whether sanitization removed scripts/iframes/forms you expected to keep for inspection—compare the sanitized HTML panel.
Frequently Asked Questions
Is this browser-only?
No. Your HTML is POSTed to /web-tools/ViewHtml on Toolomix for sanitization and preview.
Does the preview run scripts?
Sanitization removes script tags and other risky constructs before the sanitized preview is returned.
What metadata is extracted?
Page title and meta description when those tags are present in the pasted HTML.
What kinds of warnings appear?
Examples include missing doctype, missing lang on html, or images without alt text—when detected.
Can I compare original and sanitized HTML?
Yes. The results include original and sanitized views so you can see what changed.
Is this enough for production XSS defense?
No. Treat it as an inspection helper. Harden your own application with a maintained sanitization library.
Why did processing fail?
Empty input is rejected. Otherwise retry the ViewHtml request and check the on-page error message.
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Paste HTML and preview a sanitized result via ViewHtml on Toolomix.
