Base64
Encode and decode Base64 for text, images, files, and HTTP Basic Auth headers.
Text Base64
Encode and decode text to/from Base64. Supports standard and Base64URL variants with auto-detection.
About Base64
Encode text or files as Base64 and decode Base64 back to text or bytes.
Choose the text/file/image workflow and the appropriate alphabet before converting.
Copy text results or download decoded bytes; inspect the output type before opening a file.
The calculation or rendering runs in this browser tab. Copy, download and share actions make the chosen output available outside this tab.
Worked example
- Input / settings
- Hello
- Action
- Encode UTF-8 text
- Result
- SGVsbG8=
Scope and limits
- Files are limited to 10MiB. Invalid alphabet, padding or UTF-8 text produces an error and clears the old result. Auto detection cannot distinguish alphabets when the input contains only their shared characters.
Frequently asked questions
- Does Base64 protect a secret?
- No. It is reversible encoding, not encryption. Anyone with the output can decode it.
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