F FileKit
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Base64 Decoder

Decode a Base64 string back to text, preview as an image, or download as a file. Free, private, instant.

How to decode Base64

  1. Paste your Base64 string (with or without the data:…;base64, prefix) into the text area.
  2. Click Decode.
  3. If the data is text, it is displayed in the text output area.
  4. If the data is an image (data:image/…;base64,…), a preview is shown and you can download it.

What is Base64 decoding?

Base64 decoding is the reverse of encoding — it converts the ASCII text string back to its original binary or text form. This is commonly needed when extracting embedded images from HTML/CSS, parsing API responses, or debugging encoded data.

Frequently Asked Questions

Can I decode a file (not just an image)?

If you have a Base64 data URL with a known MIME type (e.g. data:application/pdf;base64,…), the tool will offer a download link so you can save the decoded file.