Strip HTML Tags — HTML to Plain Text

Introduction

CMS exports, email templates, and scraped web pages arrive wrapped in <div>, <span>, and inline styles. You need the human-readable text for search previews, Slack notifications, or character counts — not a full DOM parser in every script. textContent in browsers works in code; analysts and support staff need a paste box. Real sanitization for XSS prevention requires allowlists and libraries like DOMPurify — tag stripping alone is not security.

Certoflow's Strip HTML Tags tool removes angle-bracket tags via regex, collapses consecutive whitespace to single spaces, and trims ends. Fast, local, predictable for simple markup. Not a HTML sanitizer for rendering untrusted content in production. Pair with HTML Formatter to inspect structure before stripping, HTML Entity Encoder when re-encoding safe subsets, and JSON String Escaper when embedding extracted text in JSON.

What this tool does

Field	Behavior
HTML input	Raw markup string
Plain text output	Tags removed, whitespace normalized
Live transform	Output when input non-empty
Copy	Copy plain text result

Algorithm:

html.replace(/<[^>]*>/g, "").replace(/\s+/g, " ").trim();

Script contents inside tags are removed with the tags — no JavaScript execution occurs because input is not parsed into a document.

How it works

Regex /<[^>]*>/g matches opening and closing tags non-greedily. Nested or malformed HTML may leave artifacts — > inside attributes or unclosed tags behave imperfectly compared to DOM parsers. Whitespace normalization converts newlines and multiple spaces to single spaces — readable prose flow, not preserved preformatted layout.

All processing is client-side. Pasting untrusted HTML is safe from script execution in this tool — still treat output carefully if re-displayed as HTML elsewhere without encoding.

Real-world examples

Email preview text

Marketing HTML needs ninety-character preview snippets. Strip tags, truncate manually, paste into campaign tool.

Search index prototyping

Evaluate whether stemmed search on stripped body text beats raw HTML noise before building Elasticsearch pipeline.

Support ticket cleanup

Customer pastes formatted HTML bug report — extract steps text for internal Jira description.

RSS description fields

Some feeds include HTML descriptions — strip for plain-text aggregator UI mockups.

Contrasting with proper sanitization

Security training: strip tags here, show how <img onerror=...> disappears but attribute-based attacks in malformed HTML illustrate limits — follow with HTML Entity Encoder for safe display encoding.

Common mistakes

Using output as XSS-safe HTML. Stripped text re-wrapped in <div> without encoding can still be dangerous if it contained javascript: URLs as text displayed in vulnerable contexts. Encode on output.

Expecting preserved line breaks. Whitespace collapse removes intentional <br> structure — replace <br> manually or use DOM parser for layout fidelity.

Relying on regex for nested tags edge cases. <<script>> malformed markup may leave chevrons — use server-side HTML parser for production.

Stripping before entity decode. & remains encoded — decode entities separately if needed via HTML Entity Encoder decode path if available.

Assuming style and script content extraction. Content inside <script> tags is removed entirely, not executed or separately extracted.

Processing huge documents in browser. Very large HTML may slow tab — chunk server-side for bulk jobs.

Use cases

Content editors quick plain-text previews.

QA testers verifying CMS export text content.

Developers prototyping notification body extractors.

SEO specialists evaluating visible text ratio concepts.

Students learning difference between parsing and regex stripping.

Technical writers extracting quotes from HTML documentation exports.

FAQ

Is this a sanitizer?

No. Convenience extractor only — not for rendering untrusted HTML.

Are scripts executed?

No. Input is string-processed, not evaluated as DOM.

Preserves formatting?

No. Whitespace collapses to single spaces.

Handles malformed HTML?

Best-effort regex — imperfect versus browser parser.

Entity decoding?

Not automatic —   may remain as text.

Live updates?

Yes.

Local processing?

Yes.

Related tools?

HTML Formatter, HTML Entity Encoder.

Strip attributes only?

Not supported — entire tags removed.

Offline?

Yes, after load.

Limits of regex-based stripping

Production HTML sanitization requires parsing the DOM or using vetted libraries because malformed markup, comments hiding scripts, and foreign content embed vectors regex cannot see. Certoflow's approach suits quick text extraction when you trust the source or when output will not be re-rendered as HTML. For CMS preview text in admin dashboards, stripping tags before counting characters for Twitter cards is reasonable. For displaying user comments on a public site, never rely on this tool — store sanitized HTML server-side with an allowlist. If extracted text will be embedded in JSON API responses, run through JSON String Escaper afterward. If the goal is readable markup rather than plain text, use HTML Formatter instead and fix structure at the source rather than deleting all tags indiscriminately from templates that depend on semantic elements like <strong> for accessibility.