Encoding & Crypto— Guides & Articles

• How to Calculate a 16-Bit Checksum: Formula and Limits

  Published 2026-07-25

  Calculate a 16-bit checksum with explicit formulas, byte ranges, and a clear comparison of CRC-16, the Internet checksum, and 8-bit alternatives.

  

• How to Decode a Caesar Cipher Without the Key

  Published 2026-07-25

  Decode a Caesar cipher when you don't have the key. Find the shift from context or try all 26 options, then restore the original text with a local browser tool.

  

• How to Convert Base64 to Hex Without Mistakes

  Published 2026-07-24

  Convert Base64 to hex with strict RFC 4648 validation. Keep every byte, including leading zeros, when translating payloads, hashes, and protocol fields.

  

• Base64 Decode on Linux: Commands and UTF-8 Caveats

  Published 2026-07-24

  Decode Base64 strings on Linux using the built-in base64 command, common pitfalls with UTF-8 text and emoji, and a browser alternative that handles it all.

  

• Base58 Decode: Java Code and Browser Alternatives

  Published 2026-07-24

  Need to decode Base58 strings? See how a Java Base58 decoder works and use a browser tool that returns hex bytes and UTF-8 instantly, no code required.

  

• How to Decode Base32 Online: An RFC 4648 Walkthrough

  Published 2026-07-24

  Need to decode a Base32 string back to text? Use an online RFC 4648 tool to convert padded or unpadded Base32 to UTF-8 right in your browser, with clear errors.

  

• Base100 Encode: Map UTF-8 Bytes to Emoji Symbols

  Published 2026-07-24

  Base100 encoding maps each UTF-8 byte to one emoji-range code point from U+1F3F7 to U+1F4F6. Encode or decode Base100 symbols in your browser, no upload.

  

• Convert ASCII to Char in C++ Without Writing Code

  Published 2026-07-24

  Need to convert ASCII to char in C++? Skip the boilerplate with a free online ASCII Converter that encodes and decodes decimal codes 0–127 in your browser.

  

• How to Convert ASCII to Char: Decimal Codes to Text

  Published 2026-07-22

  Convert ASCII codes 0–127 back to readable characters with the ASCII Converter. Strict 7-bit validation, local processing, clear errors on bad input.

  

• AES Encryption Online: Secure Encrypted File Packages

  Published 2026-07-22

  Create AES-256-GCM encrypted file packages in your browser. PBKDF2-SHA-256 key derivation, fresh salt and IV, 128-bit auth tag, no upload.