Base64 Encoder/Decoder

Encode text or files to Base64 and decode Base64 strings back into readable text, images, or downloadable files.

About Base64 Encoder/Decoder

Base64 Encode and Decode Text or Files Online

The Base64 Encoder and Decoder converts plain text, uploaded files, and image data into Base64 strings, then decodes Base64 back into readable text or downloadable files when needed.

Use it for data URIs, API payloads, embedded assets, binary-to-text conversion, and quick decoding when you need to inspect a Base64 string without switching tools.

Common Uses

  • Encode images or files into Base64 for embedding in HTML, CSS, JSON, or email-safe content.
  • Decode Base64 strings from APIs, tokens, exports, or copied payloads.
  • Preview decoded image content and download the recovered output when possible.

How to use Base64 Encoder/Decoder

How To Use the Base64 Encoder and Decoder

  1. Choose text input, paste a Base64 string, or upload an image or file depending on whether you want to encode or decode.
  2. Select Encode, Decode, or Auto mode, then process the content.
  3. Copy the result, move the output back into the input, or download the decoded file if the content is binary.

Best Practices

  • Remember that Base64 increases size, so it is useful for compatibility rather than compression.
  • Use URL-safe mode only when the target system specifically expects URL-safe Base64.
  • For very large payloads, use download or direct tool actions instead of manually copying long output back and forth.

Base64 Encoder/Decoder FAQ

When should I use Base64 encoding?

Use Base64 when binary content needs to move through text-only systems, such as JSON payloads, HTML, CSS data URIs, email-safe content, or copied API values.

Can Base64 reduce file size?

No. Base64 increases size because it converts binary bytes into text-safe characters. It helps with compatibility, not compression.

Can I decode Base64 back into a file or image?

Yes. When the decoded content matches an image or other binary format, the tool can preview the result or prepare a downloadable file.

What is URL-safe Base64?

URL-safe Base64 replaces characters such as + and / so the encoded value can be used more safely inside URLs or systems that expect that variant.