Enter text or Base64
For encoding, add ordinary Unicode text. For decoding, provide a complete Base64 string with valid alphabet and padding.
Encode and decode Base64 text locally
Convert UTF-8 text to Base64 or decode a Base64 value locally. Base64 is a transport representation, not a confidentiality or access-control mechanism.
Encode or decode Base64 locally
Enter UTF-8 text to encode or a Base64 value to decode.
How to use the Base64 encoder and decoder
The Base64 encoder and decoder keeps its input on this device. Review the result using the steps below before sharing or relying on it.
Choose encode or decode
Encoding converts UTF-8 bytes into a portable ASCII representation. Decoding reverses that representation into readable text when the bytes are valid UTF-8.
Treat decoded output as untrusted
A decoded value may contain scripts, commands, markup, or credentials. Inspect it as data and never execute unfamiliar output automatically.
What the Base64 encoder and decoder does not do
Base64 does not encrypt, authenticate, compress, anonymize, or safely store information. Anyone with the encoded text can usually reverse it immediately.
Before sharing the result, read Pastebin.ai security model for the matching context and privacy checks.
Base64 encoder and decoder questions
Privacy, limits, and correct interpretation.
Is Base64 encryption?+
No. It is reversible encoding and provides no secrecy.
Does this tool upload input?+
No. Encoding and decoding run locally in the browser.
Why might decoding fail?+
The value may use an invalid alphabet, have missing padding, be truncated, or represent bytes that are not valid UTF-8 text.
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