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Base64 Tool

Encode text or files to Base64, or decode Base64 back to text. Local-only processing with optional URL-safe encoding.

Input

Max 2MB

0 chars
Output

Enter text or upload a file to encode

Base64 Tool: Guide

Intent
Encode text or files to Base64, or decode Base64 back to text. Simple, fast, and local-only.
What it does
Encodes text or binary files to Base64 format, or decodes Base64 strings back to their original form. Supports URL-safe Base64 variant.
Key features
Text-to-Base64 encoding, Base64-to-text decoding, File upload support, URL-safe Base64 option, Copy and download results
Privacy
Runs locally in your browser. Files and text are not uploaded.
Best for
  • Encoding binary data for email or JSON transmission
  • Decoding Base64 strings from APIs or configurations
  • Creating data URIs for small images
  • Debugging Base64-encoded data
Why this tool
  • Simple two-way conversion
  • File upload support for binary encoding
  • URL-safe Base64 for web applications
  • No external uploads required

How to use

  1. 1Select Encode or Decode mode.
  2. 2For encoding: paste text or upload a file (max 2MB).
  3. 3For decoding: paste a Base64 string.
  4. 4Toggle URL-safe option if needed for web use.
  5. 5Copy the result or download as a file.

Common mistakes

  • Forgetting to toggle URL-safe mode when working with web URLs.
  • Trying to decode invalid Base64 strings (must be valid characters and proper padding).
  • Very large files may exceed the 2MB limit.

Examples

Encode text to Base64
Input: Hello World Output: SGVsbG8gV29ybGQ=
Decode Base64 to text
Input: SGVsbG8gV29ybGQ= Output: Hello World

Related tools

Text Diff
Compare Base64 strings or decoded content.
AI Text Cleaner
Clean up text before encoding.
URL Parameter Cleaner
Clean URLs containing Base64 parameters.