Text String Obfuscator
Obfuscate text locally with homoglyphs, zero-width characters, or numeric HTML entities, then decode common patterns in the browser.
Last reviewed: June 2026New to this tool? Click here for instructions
How to use the String Obfuscator
Choose one of the four modes, paste text into the input area, and the output updates immediately. Homoglyphs mode replaces selected Latin letters with look-alike Unicode characters. Zero-Width mode inserts invisible characters between visible characters. HTML Entities mode emits numeric character references. Decode mode strips common zero-width characters, decodes numeric entities, and maps known homoglyphs back to their base letters where possible.
The tool does not send text to an external API. Each transform is a local JavaScript operation in the current browser tab, which is useful when you are testing Unicode handling in UI components, search filters, copy/paste flows, moderation tools, or markup renderers.
Authorized uses and safety notes
Use this page for defensive testing, accessibility review, text rendering QA, watermark experiments, and Unicode education. Do not use obfuscation to evade platform rules, hide malicious links, impersonate trusted brands, or bypass security controls. Homoglyphs and zero-width characters can make text misleading to humans while still looking ordinary on screen.
When testing application defenses, log both the raw code points and the displayed text. A payload that looks like paypal.com may contain Cyrillic or Greek characters, and a copied string may include invisible code points that break exact-match filters.
Mode reference
| Mode | What it changes | Reversible? | Best use |
|---|---|---|---|
| Homoglyphs | Selected Latin letters become look-alike Unicode characters | Partly | Spoofing and rendering tests |
| Zero-Width | Invisible code points are inserted between characters | Yes, for known zero-width characters | Copy/paste and filter robustness tests |
| HTML Entities | Characters become numeric HTML character references | Yes, after HTML/entity decoding | Markup parser and scraper tests |
| Decode | Strips zero-width characters, decodes numeric entities, maps known homoglyphs | Best effort | Inspecting suspicious or confusing strings |
Worked example
Paste Hello World! and choose HTML Entities. The output becomes numeric character references such as Hel. Switch to Decode, paste that output back into the input, and the browser reconstructs Hello World!.
For a harder case, choose Homoglyphs and compare the displayed result with each character's code point in Unicode Inspector. That exposes why visually similar text can fail equality checks or evade naive string matching.
Useful references: Unicode UTS #39 Security Mechanisms, MDN HTML entity glossary, and WHATWG named character references.