Base64 Encoder / Decoder

What is a Base64 Encoder?

A Base64 encoder is a developer tool that converts binary data, text, and files into Base64-encoded strings for safe transmission over text-based protocols like HTTP, email, and JSON. Base64 encoding represents binary data using only 64 ASCII characters (A-Z, a-z, 0-9, +, /), making it safe for embedding in URLs, data URIs, and text-based formats. Our free Base64 encoder supports encoding and decoding text, strings, files (images, documents), URL-safe Base64, and Data URI generation. All encoding and decoding happens 100% client-side in your browser, ensuring your data never leaves your device and remains completely private.

Benefits & Features

Encode and decode text, strings, and binary data to/from Base64File upload support for images, documents, and other file typesURL-safe Base64 encoding for use in URLs and query parametersData URI generation for embedding files directly in HTML/CSSBase64 validation to verify if a string is valid Base64Auto-encode/decode mode for real-time conversionDetailed statistics showing input/output size and encoding efficiency100% client-side processing - your data never leaves your browserNo registration or installation required - use instantly

How to Use the Base64 Encoder

1. 1

   Select mode

   Choose between Encode (text to Base64) or Decode (Base64 to text) mode depending on your needs.

2. 2

   Enter text or upload file

   Type or paste your text into the input field, or upload a file (image, document) to encode it to Base64.

3. 3

   Configure options

   Select URL-safe encoding if you need Base64 for URLs, or enable Data URI mode for HTML/CSS embedding.

4. 4

   Encode or decode

   Click the "Encode" or "Decode" button to convert your data. The result will appear instantly in the output field.

5. 5

   Copy or download

   Copy the Base64 string to your clipboard or download it as a text file for use in your projects.

6. 6

   Validate Base64

   Use the validation feature to check if a string is valid Base64 before decoding it.