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Obfuscate strings with masking and reversible transforms. Use when hiding PII in demos; for hashing use hash-generator. Input: text ≤10MB. Returns obfuscated text. 100% client-side.
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Obfuscate strings using 8 different encoding methods simultaneously: hex encoding, binary, unicode escapes, HTML entities, URL encoding, base64, reverse string, and ROT13. Each result is displayed with a copy button for easy use.
Developers frequently need to encode or obfuscate strings for various purposes like escaping data for different formats, generating test data, or understanding how encoding works across different systems.
This tool is part of the DevStackIO platform — a collection of free online developer tools from DevStackIO. Browse more free developer resources on DevStackIO.
Web developers, security researchers, CTF players, and anyone who needs to convert text between different encoding formats quickly.
Type or paste the text you want to obfuscate into the Input Text area
All 8 obfuscation methods are computed and displayed simultaneously
Click the Copy button next to any result to copy the obfuscated text to your clipboard
The description badge next to each method shows a preview of what the output looks like
Results update in real-time as you type in the input field
Input: "Hello, World!" → Base64: SGVsbG8sIFdvcmxkIQ==Input: "<script>" → HTML Entities: <script>Input: "password" → ROT13: cebjqrfInput: "hello" → Hex: 68656c6c6fIs base64 the same as encryption?
No, base64 is an encoding scheme, not encryption. Anyone can decode base64-encoded text trivially.
When should I use ROT13?
ROT13 is mainly used for hiding spoilers or in CTF challenges. It provides zero real security.
Why does my URL-encoded string look different from what I expected?
URL encoding can vary based on what characters are encoded. This tool encodes all non-alphanumeric characters for safety.
Can I use HTML entities in JavaScript strings?
HTML entities are interpreted by browsers in HTML context, not in JavaScript strings. Use unicode escapes (\uXXXX) for JavaScript.
Authoritative specifications, standards, and in-depth reading for String Obfuscator.
\x48\x65\x6c\x6c\x6f\x2c\x20\x57\x6f\x72\x6c\x64\x21\x20\x31\x32\x33
01001000 01100101 01101100 01101100 01101111 00101100 00100000 01010111 01101111 01110010 01101100 01100100 00100001 00100000 00110001 00110010 00110011
\u0048\u0065\u006c\u006c\u006f\u002c\u0020\u0057\u006f\u0072\u006c\u0064\u0021\u0020\u0031\u0032\u0033
Hello, World! 123
Hello%2C%20World!%20123
SGVsbG8sIFdvcmxkISAxMjM=
321 !dlroW ,olleH
Uryyb, Jbeyq! 123
All obfuscation is done client-side. Your data never leaves your browser.
Reverse text by characters (grapheme-safe for emoji), words, or lines.
Count characters, words, lines, and bytes. Use for quick length checks; for full stats use word-counter. Input: text ≤10MB. Returns counts. 100% client-side.
Compute similarity % and Levenshtein distance between strings. Use for fuzzy match scoring; for visual diff use text-diff-visual. Input: two strings ≤10MB. Returns similarity + distance. 100% client-side.
Count words, characters, and sentences. Get reading time and Flesch score as you type.
Sort lines alphabetically and remove duplicates. Use when cleaning lists; for comparing two texts use text-diff-visual. Input: text lines ≤10MB. Returns sorted unique lines. 100% client-side.
Preview rendered Markdown without editing. Use for quick read-only preview; for editing use markdown-editor, for HTML output copy use markdown-to-html. Input: Markdown ≤10MB. Returns rendered HTML preview. 100% client-side.
Generate URL slugs from titles with lowercase rules. Use as default slug tool; slugify-string is a noindex alias. Input: text ≤10MB. Returns slug string. 100% client-side.
Visual side-by-side diff for two texts with char-level highlights. Use as default diff tool; for similarity score use string-comparison, for JSON use json-diff. Input: two texts ≤10MB. Returns visual diff. 100% client-side.