EsyTool

Base64 Encoder & Decoder Online

Encode text to Base64 or decode Base64 strings back to readable text. Processes instantly as you type.

Runs entirely in your browser
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Specialized use cases

Base64 Decode Online - Free & InstantDecode a Base64 string back to readable text instantly in your browser. No upload, fully client-side.Text to Base64 Encoder - Free & InstantEncode plain text into Base64 instantly in your browser. Useful for data URIs, API payloads, and email attachments.
How to use Base64 Encoder & Decoder
  1. 1Choose Encode or Decode mode.
  2. 2Type or paste your text.
  3. 3Copy the result instantly.
Privacy & security

Text is encoded and decoded entirely in your browser using native btoa/atob — nothing is uploaded or logged.

No data leaves your browser.

Frequently asked questions
Is Base64 the same as encryption?

No. Base64 is an encoding, not encryption — anyone can decode it instantly. It has no security property and should never be used to protect sensitive data.

Why does my Base64 string fail to decode?

Base64 uses only A-Z, a-z, 0-9, +, /, and = for padding. If the input contains other characters, or isn't a multiple of 4 characters after removing padding, decoding will fail.