Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text. Supports Unicode.
About Base64
What is Base64?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A–Z, a–z, 0–9, +, /).
Common uses
Embedding images in HTML/CSS, encoding email attachments (MIME), passing data in URLs, and storing binary data in JSON.
Size impact
Base64 encoding increases data size by approximately 33%. A 3-byte input becomes 4 Base64 characters.
Base64 Encoder / Decoder FAQ
Answers to the most common questions about this page.
Can I encode plain text to Base64 and decode it back?
Yes. The tool supports both Base64 encoding and decoding in one interface.
Does the Base64 tool support Unicode text?
Yes. Unicode input is supported, so non-ASCII text can be encoded and decoded correctly.
Can I use this tool for API payload and token debugging?
Yes. It is useful for inspecting Base64 strings commonly used in APIs, configs, and encoded payloads.
Is Base64 conversion done locally?
Yes. Conversions run in your browser without sending data to a server.
Related Tools
If you're using Base64 Encoder / Decoder, you may also want JSON Formatter, Text Counter and UUID Generatorto keep your workflow moving.