HTML Entity Encoder
HTML Entity Encoder is a free browser tool that lets you encode/decode html entities. Parsing, formatting and validation all run in your browser, so API keys, tokens and internal payloads are never transmitted. It is used most by DevOps staff reading config and log data quickly. Handles large payloads — several megabytes of JSON is fine. It stays free with unlimited use, and there is no watermark on anything it produces.
Key features
- Handles large payloads — several megabytes of JSON is fine.
- Reports the line and position of a syntax error instead of failing silently.
- Works on desktop, tablet and phone — no separate app to install.
- No ads interrupting the tool itself, and no upsell before the result.
How to use HTML Entity Encoder
- Paste your input: Drop the payload, code or value into the box above.
- Run it: Press the action button — errors are reported with their position.
- Take the output: Copy the result, or download it when the output is a file.
Frequently asked questions
- Does it follow the official spec? — Yes — the published specification, not a simplified version, so results match your language's own parser.
- How large an input can it take? — Several megabytes is routine. The limit is your browser's memory, not a server quota.
- Can I use it at work? — Yes, and the local-only processing is usually what makes it acceptable under a company data policy.
- Is there a rate limit? — None. There is no server involved, so nothing to limit.