Base64 Decode
Paste a Base64 string and get the original text. URL-safe alphabets, missing padding and wrapped lines are handled automatically.
- Runs in your browser
- Free, no sign-up
What this tool gives you
Standard and URL-safe
Both alphabets are detected, with or without the trailing = padding.
Binary detection
Non-text payloads are shown as a hex dump and can be downloaded as a file.
Private
Decode tokens and credentials without them leaving your machine.
Frequently asked questions
Why do I see a hex dump instead of text?
The decoded bytes are not valid UTF-8, so the data is binary, for example an image or a compressed blob. Use the download button to save it.
Can I decode a JWT token?
Each of the three dot-separated parts is Base64url. Paste the header or payload part alone to read its JSON; the signature part is binary.
What if the string has line breaks?
Whitespace and line breaks are stripped before decoding, so MIME-wrapped Base64 from emails decodes without any manual cleanup.
Is Base64 encryption?
No. It is an encoding that makes binary data safe for text channels. Anyone can decode it, so never treat it as protection.