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Base64, SHA-256 Hash, Timestamp, UUID & UTM Builder

All-in-one developer swiss-army knife: UTF-8 Base64, URL encode, SHA-256/512, Unix timestamp converter, bulk UUID v4 & UTM link builder.

📖 How to Use & Technical Guide

  1. Use the top panel for instant Base64 / URL encoding & decoding and SHA-256 / SHA-512 cryptographic hashing.
  2. Use the middle panel to convert between Unix Epoch timestamps (seconds/milliseconds) and ISO/Local dates, or generate bulk UUID v4 strings.
  3. Use the bottom panel to build trackable UTM marketing URLs with campaign parameters.

❓ Frequently Asked Questions

Why do some Base64 tools corrupt Chinese or Emoji characters?
Browser window.btoa() only supports Latin1 characters by default. Our toolkit encodes strings via UTF-8 TextEncoder byte arrays first, ensuring 100% lossless CJK and Emoji encoding.
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