Free Base64 Encoder and Decoder

Encode and decode Base64 strings and files with our free online tool. Perfect for developers working with data URIs, API tokens, and file conversions.

Features

Encode text to Base64
Decode Base64 to text
Encode files and images to Base64
Decode Base64 to downloadable files
URL-safe encoding option
Image preview for encoded/decoded images
Copy to clipboard with one click
100% client-side processing

What is Base64?

Base64 is an encoding scheme that converts binary data into ASCII text format. It's commonly used to encode images, files, and binary data for transmission over text-based protocols like HTTP and email.

Common Use Cases

Embed images directly in HTML/CSS using data URIs
Encode files for API transmission
Work with authentication tokens
Convert files for email attachments (MIME)
Debug and inspect JWT tokens

How to Use Base64 Encoder/Decoder

1Choose between 'Text' or 'File' mode depending on what you want to encode/decode
2Select 'Encode' to convert to Base64, or 'Decode' to convert from Base64
3For text: paste your content in the input area
4For files: click or drag to upload your file
5Toggle 'URL-safe encoding' if you need Base64 for URLs
6Click the action button to process, then copy or download the result

Base64 Examples

Simple Text Encoding

Hello World → SGVsbG8gV29ybGQ=

Basic text encoding to Base64 format

URL-Safe Encoding

Uses - and _ instead of + and / for URL compatibility

Ideal for query parameters and URL paths

Data URI for Images

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA...

Embed images directly in HTML/CSS

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