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Base64

Encode or decode text and files locally.

Or encode a file to Base64
Drop a file
up to 20 MB
Max file size: 20 MB

About this tool

Encode and decode Base64 - handy for embedding binary data in JSON, debugging APIs and inspecting JWTs.

Features

  • Encode and decode strings or files
  • URL-safe Base64 option
  • Live two-way conversion
  • Local

How to use it

  1. Paste text or upload a file.
  2. Pick encode or decode.
  3. Copy the result.
🔒 100% private

Everything happens inside your browser using JavaScript and WebAssembly. Your files are never uploaded to a server, never stored, and never seen by us.

Frequently asked questions

What's URL-safe Base64?

It replaces + and / with - and _ so the value can sit safely in URLs.