Free Base64 Encoder & Decoder Online

How to use

1. 1

   Enter your text or Base64

   Paste the string you want to encode or decode into the input field.

2. 2

   Choose encode or decode

   Click Encode to convert text to Base64, or Decode to convert Base64 back to text.

3. 3

   Copy the result

   Copy your output with the Copy button.

Why use this tool?

• ✓Runs entirely in your browser - no server, no upload
• ✓Supports full UTF-8 including emojis and international characters
• ✓Handles both standard Base64 and URL-safe Base64 (using - and _ instead of + and /)
• ✓Shows clear error messages for invalid Base64 input

Frequently asked questions

What is Base64 encoding?

Base64 converts binary data (or text) into a set of 64 printable ASCII characters. It's commonly used to embed images in HTML, send data in URLs, or store binary data as text.

Is my data safe?

Yes. Encoding and decoding happens entirely in your browser with no server involvement.

Does it support emojis?

Yes. This tool uses TextEncoder internally, so any UTF-8 text including emojis, CJK characters, and accented letters works correctly.

What's the difference between standard and URL-safe Base64?

Standard Base64 uses + and / characters which are special in URLs. URL-safe Base64 replaces them with - and _ so the result can be used directly in URLs without encoding.

Related tools