String Escape / Unescape
String Escape / Unescape handles one task — escape js strings, url encode/decode — without an account or a download. Parsing, formatting and validation all run in your browser, so API keys, tokens and internal payloads are never transmitted. It is used most by frontend developers checking a token or payload shape. Handles large payloads — several megabytes of JSON is fine. Free, unlimited, and free of the upsells most tools of this kind carry.
Key features
- Handles large payloads — several megabytes of JSON is fine.
- Nothing is logged, which is what makes it safe for production data.
- 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 String Escape / Unescape
- 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
- Can I use it at work? — Yes, and the local-only processing is usually what makes it acceptable under a company data policy.
- Is it safe to paste production data into String Escape / Unescape? — Yes. String Escape / Unescape runs entirely in your browser — no request is made, nothing is logged, and nothing persists after you close the tab.
- Does it follow the official spec? — Yes — the published specification, not a simplified version, so results match your language's own parser.
- Is there a rate limit? — None. There is no server involved, so nothing to limit.