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🔐 String Escape / Unescape

Escape & unescape strings locally for JSON, JavaScript, Java, HTML, XML, SQL, and CSV

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Base64 Encode/Decode
Encode and decode text with standard and URL-safe Base64, including UTF-8 and Unicode support.
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Base-N Encode / Decode
Convert UTF-8 text, hex, Base32, Base32hex, Base64, and Base64url locally in your browser with strict rules.
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Binary Complement Calculator
Visualize sign-magnitude, ones' complement and two's complement for integers with 8/16/32/64-bit widths, dec/bin/hex I/O, step-by-step derivation, color-coded bit grid and boundary presets
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Caesar / Vigenère Cipher
Caesar and Vigenère cipher encrypt/decrypt with brute-force, crib filtering, chi-squared ranking, frequency analysis, IC, Kasiski auto-crack, and Tabula Recta
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CRC Calculator
CRC-8/16/32/64 Checksum Calculator with 24 algorithms, text/hex/file input

Free online string escape and unescape tool supporting 7 formats: JSON, JavaScript, Java, HTML, XML, SQL (ANSI), and CSV (RFC 4180). All processing runs locally in your browser — input data is not uploaded by the tool. JSON mode follows RFC 8259 with correct Unicode surrogate pair handling. HTML and XML modes support bidirectional conversion of named and numeric character entities. JavaScript mode handles \x hex and \u Unicode escapes. SQL uses ANSI-standard single-quote doubling. CSV follows RFC 4180 quoting rules. Perfect for developers debugging API responses, building database queries, and generating safe markup content.