UtilityBaseDeveloper Tools
Base64 Encoder / Decoder
Encode text to Base64 or decode it back — full Unicode support.
Updated February 18, 2026
How to use the base64 encoder / decoder
- 1Type or paste text (or Base64) into the input.
- 2Click Encode or Decode.
- 3Copy the result.
Common uses
- Decode JWT header and payload segments while debugging.
- Create data for basic auth headers and data URLs.
- Inspect Base64 values found in configs and logs.
Frequently asked questions
Is Base64 encryption?
No. Base64 is a reversible encoding anyone can decode — it provides zero secrecy. Its job is representing binary data as safe text, not protecting it.
Why do decoded results sometimes look like garbage?
The Base64 you decoded probably represents binary data (an image, compressed data) rather than text — or it isn't valid Base64. This tool decodes to UTF-8 text.
Does this handle emoji and non-English text?
Yes. Text is encoded via UTF-8 before Base64, so any Unicode text round-trips correctly.
What are the = signs at the end of Base64?
Padding. Base64 works in 3-byte blocks; when input length isn't a multiple of 3, one or two = characters pad the final block.
About this tool
The Base64 tool converts text to Base64 and back, with correct handling of Unicode (emoji and non-Latin scripts survive the round trip, unlike naive btoa implementations). Base64 represents binary data as safe ASCII text and appears everywhere in development: JWT segments, data URLs, basic auth headers, email attachments, and API payloads. Encode or decode instantly, locally, with one-click copy. Note that Base64 is an encoding, not encryption — anyone can decode it.
Like everything on UtilityBase, the base64 encoder / decoder runs entirely in your browser — nothing you enter is uploaded or stored on a server. It's free to use with no account required. Browse more developer tools here.
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