What is the HTML Entity Encoder?
Escape special characters into HTML entities. Everyday utilities for developers — encoders, formatters, hashes and generators — that run locally in your browser with standard Web APIs. No data is sent to any server.
How to use the HTML Entity Encoder
- Paste or type your your text into the box (a sample is pre-filled so you can see how it works).
- Results update automatically as you type; you can also press Calculate.
- Read the output: result.
- Use the 📊 chart to see the result visually, then copy or share it.
Tips for better results
- Hashes use the Web Crypto API and match command-line tools such as sha256sum.
- Never paste production secrets into any website — even client-side tools.
- Use JSON Validator before JSON Formatter to see precise error positions.
Frequently asked questions
What does the HTML Entity Encoder do?
Escape special characters into HTML entities.
Is the HTML Entity Encoder accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the HTML Entity Encoder is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
Related tools
HTML Entity DecoderConvert HTML entities back into readable characters.JSON FormatterFormat and pretty-print JSON with your choice of indentation, and catch syntax errors.JSON MinifierMinify JSON by removing whitespace.JSON ValidatorValidate JSON and see the exact parse error if it is invalid.CSV to JSON ConverterConvert CSV with a header row into a JSON array of objects.JSON to CSV ConverterConvert a JSON array of objects into CSV.CSV to HTML TableConvert CSV data into clean HTML table markup.CSV to Markdown TableConvert CSV into a Markdown table for READMEs and docs.
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