Base64 Encode / Decode

Encode text to base64 or decode base64 back to text. UTF-8 safe.

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Your files never leave your device
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Text or fileSource
Runs entirely in your browser — nothing is uploaded.
Base64Result

Encode and decode Base64 — text or files — with a clear, two-panel view. Convert any file to a Base64 data URI for embedding, decode strings back to text or bytes, and switch to the URL-safe alphabet when you need it.

How to use Base64 Encode / Decode

  1. 1Choose a direction: Text → Base64 or Base64 → Text.
  2. 2Type/paste your text, or load a file to encode.
  3. 3Toggle URL-safe encoding if your output goes in a URL or filename.
  4. 4Copy the result, or download decoded bytes / preview decoded images.

Frequently asked questions

No. Base64 encoding and decoding happen locally in your browser, so files and strings — including any secrets you’re embedding — are never transmitted anywhere.
Standard Base64 uses “+” and “/” and may include “=” padding. URL-safe Base64 replaces them with “-” and “_” and drops padding, so the value is safe to put in URLs, filenames, and JWTs.
Yes. In the File / Image mode, load any file and get its Base64 plus a ready-to-paste data URI. Images show a live preview.
Base64 represents binary using a 64-character text alphabet, which adds roughly 33% overhead. The tool shows the exact size and increase so you can see the cost.
Yes — completely free, no account, and no limit on how much text or how many files you process.

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