HTML Entities
Encode text as HTML entities or decode named and numeric entities back to readable text locally.
🔒 Runs entirely in your browser — nothing is uploadedWhat HTML Entities does
HTML Entities encodes characters that have special meaning in HTML and decodes entity references back to readable text. It is useful when preparing examples for documentation, writing test fixtures for escaping logic, inspecting CMS output, cleaning up copied snippets, or converting visible text into a form that can safely appear inside HTML source. The encoder covers ampersands, angle brackets, quotes, apostrophes, and non-ASCII characters with numeric entities where appropriate. The decoder supports browser-recognized named entities such as amp, lt, gt, quot, apos, copy, nbsp, and many more through the browser's own HTML parser.
Real-world snippets often mix named entities with decimal or hexadecimal numeric references generated by templates, editors, feeds, and legacy systems. This tool makes it easy to move between the visible text and source form without writing a scratch script. The swap button lets you feed output back into the opposite mode when checking round trips.
Private browser-based workflow
All processing happens inside your browser with client-side JavaScript. The tool does not upload snippets, configuration values, generated data, query text, or copied examples to a server, and it does not require an account. That local-only model matters for developer utilities because the content pasted into them often looks like real application data: API responses, logs, environment-shaped samples, database queries, markup from drafts, or values copied from production debugging sessions. Keeping the transformation local reduces risk and keeps the interaction fast because there is no network round trip.
The interface is intentionally compact so you can paste input, adjust options, inspect output, copy it, and move back to your editor. Results should still be reviewed before being committed, shared publicly, or used in a production workflow. Browser tools are excellent for quick inspection and preparation, but they cannot understand every project convention, data classification rule, or application-specific validation requirement.
Practical tips
Entity encoding is not a complete security sanitizer by itself. Use it as a text transformation for examples, tests, and simple escaping checks, not as a replacement for framework escaping, DOM APIs, content security policy, or a vetted sanitizer when rendering untrusted HTML. Context matters: escaping for an HTML text node differs from escaping for attributes, URLs, JavaScript strings, and CSS. When decoding, remember that the output may contain real angle brackets or quotes again, so review it before pasting into a page or template.
How to use
- Choose modeSelect encode or decode depending on the source text.
- Transform textConvert characters to entities or entities back to characters.
- Copy resultCopy the transformed output for HTML, docs, or tests.