CodeKit
Free online encoding, decoding & developer tools.
All processing happens locally in your browser. No data uploaded.
Batch Processing
Process multiple items at once. Paste a list and encode/decode them all in one click.
Real-time Preview
See results instantly as you type. Side-by-side input and output for quick comparison.
Encoding Pipeline
Chain multiple encoding/decoding steps together. Build custom transformation pipelines.
Encoding Tools
Base64 Encode & Decode
Encode text to Base64 or decode Base64 back to text. Supports UTF-8, URL-safe variant, and batch processing.
πURL Encode & Decode
Encode or decode URL components. Handles special characters and Unicode.
πHTML Entity Encode & Decode
Encode special characters to HTML entities or decode them back.
π’Hex Encode & Decode
Convert text to hexadecimal representation or decode hex back to text.
π’Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
πUnicode Encode & Decode
Convert text to Unicode escape sequences (\uXXXX) or decode them back to readable text.
π¦UTF-8 Encode & Decode
Convert text to UTF-8 byte representation (hex) or decode UTF-8 bytes back to text.
π§MIME Decoder
Decode MIME encoded-word format (Base64 or Quoted-Printable) used in email headers.
Formatting Tools
JSON Formatter & Validator
Format, minify, and validate JSON data with syntax highlighting.
πText Diff
Compare two texts and highlight the differences.
πTimestamp Converter
Convert between Unix timestamps and human-readable dates.
π―Regex Tester
Test regular expressions with real-time matching and capture groups.
πUUID Generator
Generate random UUIDs (v4) individually or in bulk.
π¨Color Converter
Convert colors between HEX, RGB, HSL, and other formats.
πLorem Ipsum Generator
Generate placeholder text for your designs and layouts.
πCSV β JSON Converter
Convert between CSV and JSON formats. Supports custom delimiters including comma, tab, and semicolon.
πYAML β JSON Converter
Convert between YAML and JSON formats. Supports all YAML data types and structures.
πXML Formatter
Format and minify XML documents with customizable indentation.
Crypto Tools
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text.
πHMAC Generator
Generate HMAC-SHA256 and HMAC-SHA512 signatures with a secret key.
πRSA Key Formatter
Format PEM-encoded RSA keys and certificates with proper 64-character line wrapping.
π«JWT Decoder
Decode and inspect JSON Web Tokens (JWT).