Minimo Digital
Minimo Digital

Base64 Encode/Decode

Quickly encode files to base64 or decode base64 strings. Image preview supported.

Encode

Decode

How to Use Base64 Encoder/Decoder?

To Encode:

  1. Select a file using the File input under the Encode section.
  2. Click Encode to convert your file to Base64.
  3. The Base64 string will appear in the text area.
  4. Click Copy to copy the Base64 string to your clipboard.

To Decode:

  1. Paste your Base64 string into the text area under the Decode section.
  2. Optionally enter a filename for the decoded file.
  3. Click Decode & Download to convert and download the file.

Base64 Encoding & Decoding Made Simple

Encode any file to Base64 format or decode Base64 strings back to files. Essential tool for developers working with data URIs, email attachments, and embedded resources.

Common Use Cases

  • Embed Images in HTML/CSS - Convert images to data URIs for inline embedding
  • API Development - Encode files for JSON payloads
  • Email Attachments - Prepare files for MIME encoding
  • Data Transfer - Safely transmit binary data as text

Features

  • Automatic MIME type detection
  • Data URI generation for web use
  • Image preview for decoded images
  • Copy to clipboard functionality
  • Supports all file types

Frequently Asked Questions

What is Base64 encoding used for?

Base64 is used to encode binary data (images, files) as ASCII text so it can be safely transmitted in contexts that only support text, such as JSON payloads, email attachments, and HTML data URIs.

Can I embed images directly in HTML using Base64?

Yes. Encode your image to Base64 and use the resulting data URI (e.g. data:image/png;base64,...) directly in an <img> src attribute or CSS background-image property, eliminating a separate HTTP request.

What file types can I encode to Base64?

Any file type is supported — images (PNG, JPG, GIF, SVG), PDFs, fonts, audio, and more. The encoder detects MIME type automatically and generates a proper data URI.

Is there a file size limit for Base64 encoding?

There is no hard limit in the tool, but keep in mind Base64 increases file size by approximately 33%. Very large files produce very long strings that may cause performance issues in browsers.