Base64 Encode Decode
Browser-based Base64 encoder and decoder for text, files and images. Convert strings, data URIs and credentials instantly without uploading anything.
How to use this Base64 tool
- Choose Encode to turn plain text into a Base64 string or Decode to reverse the process.
- Paste or type your content into the left panel. The converter debounces as you type so you can edit without jumps.
- Copy the output with the toolbar button and drop it into JSON payloads, HTML attributes, or configuration files.
Need to inspect what's inside a token after decoding? Pair this page with the JWT inspector or send the cleaned JSON through the JSON formatter to keep your workflow in one place.
Best practices for Base64 data
- Watch for the 33% size increase—use Base64 for credentials, tokens, or small assets, not original binaries.
- Strip whitespace and line breaks before decoding; malformed strings often contain hidden characters from copy-paste.
- When embedding images, verify the MIME type prefix or switch to the image-to-Base64 tool for drag-and-drop media support.