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Base64 Encoder & Decoder

Base64 encoding transforms binary data (images, files) into a text format safe for transport over text-only channels. Developers use it for data URIs, embedding assets, or passing JSON over URLs. QuickTools Base64 Encoder & Decoder manages both encoding and decoding in your browser.

Features

  • Encode: text → Base64 with full Unicode support via encodeURIComponent.
  • Decode: Base64 → original text or binary string.
  • Error handling: alerts you on invalid input.
  • Client-side only: no external calls; your data stays local.

How to Use

  1. Select mode: Encode or Decode.
  2. Paste your text or Base64 string into the input box.
  3. Click Convert to see the result in the output area.
  4. Copy the output for embedding or transmission.

Common Scenarios

  • Embedding images as Data URIs in CSS/HTML.
  • Sending JSON payloads in URL parameters.
  • Quick testing of API endpoints.
  • Encoding tokens for development purposes.

QuickTools Base64 Encoder & Decoder is a lightweight, versatile utility for every web developer and API tester.

🔤 Base64 Encoder/Decoder