Encoding & Crypto— Guides & Articles

• 4 Rail Fence Cipher Decoder: Walk Through the Zigzag

  Published 2026-08-22

  Decode a 4 rail fence cipher with the zigzag pattern 0,1,2,3,2,1 (cycle 6). See the row-by-rail reconstruction and run it locally in your browser.

  

• Convert Punycode to Text: Decode xn-- Domains Safely

  Published 2026-08-21

  Convert punycode to text in your browser: decode xn-- domain labels to Unicode, inspect each label for look-alikes, and verify before visiting.

  

• Check Password Strength in JavaScript Without a Server

  Published 2026-08-21

  Run a password strength check in JavaScript in the browser. Count Unicode code points, flag simple patterns, and follow NIST-aligned guidance locally.

  

• Base64 to File: Decode a String Into a Downloadable File

  Published 2026-08-21

  Convert Base64 to a file locally in your browser. Decode canonical padded Base64 into a downloadable file with a chosen filename and MIME type — no upload,…

  

• Create a Password to PDF That's Hard to Crack

  Published 2026-08-21

  A strong PDF password starts with a long, random string. Generate one locally with a cryptographically secure RNG, then paste it into any PDF encryption tool.

  

• How to Hear Morse Code: Translate Text Into Sound

  Published 2026-08-21

  Translate text into Morse code sound instantly. The browser tool renders authentic 600 Hz tones using ITU dot-and-dash timing — no signup, no upload.

  

• HTML Escape Bulk: Process Large Pastes Without Uploading

  Published 2026-08-21

  Paste large blocks of text and HTML-escape every reserved character in one pass with a local browser tool. No upload, 500K char cap, basic and non-ASCII modes.

  

• Calculate CRC32 for ZIP, PNG, and Gzip Files

  Published 2026-08-20

  Calculate CRC32 the right way using CRC-32/ISO-HDLC. Enter UTF-8 text or hex bytes, match the eight-digit check value, and avoid common variant mistakes.

  

• Calculate the Checksum for a FIX Message

  Published 2026-08-20

  Calculate the FIX message checksum with the Checksum Calculator's byte-sum modulo 256, XOR-8 BCC, and Modbus ASCII LRC from text or hex.

  

• Caesar Cipher Decoder and Encoder for Shifts 0 Through 25

  Published 2026-08-20

  Use a Caesar cipher decoder and encoder to shift ASCII letters by 0 to 25 positions in your browser. Case, punctuation, numbers, and non-ASCII text stay…