Base64 Encode / Decode

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

100% Private
Your files never leave your device
Lightning fast
Optimised for speed
No sign-up
Use instantly, no account
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

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.
No. Everything runs entirely inside your browser using your own device — your files never leave your computer or get uploaded anywhere. That makes it private and fast, even for large files.
Yes, completely free with no sign-up, no watermark, and no daily limits. Use it as much as you like.

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