What is Base64 encoding?
Base64 is a text encoding that represents binary data using ASCII characters. It is commonly used to include data safely in text-based formats such as JSON, HTML, email, and URLs.
Base64 Encode & Decode
Convert text to and from Base64 directly in your browser.
How it worksINPUT
OUTPUT
How to encode and decode Base64
- Select Encode to convert plain text to Base64, or Decode to turn Base64 text back into readable text.
- Paste or type your text into the input editor.
- The converted result appears automatically in the output editor.
- Copy the result when you are ready, or clear both editors to start again.
Common Base64 uses
Base64 is often used for data URIs, email attachments, API payloads, Basic Authentication headers, and embedding binary data in JSON or other text-only formats.
Base64 decoding tips
- Use the standard Base64 alphabet: letters, numbers, +, /, and optional = padding.
- Remove prefixes such as
data:text/plain;base64,before decoding. - Base64 is reversible, so never treat it as a way to secure sensitive information.
Base64 Encoder & Decoder FAQ
Is Base64 encryption?
No. Base64 is an encoding format, not encryption. Anyone can decode Base64 text, so do not use it to protect passwords, secrets, or other sensitive data.
Does this Base64 tool support Unicode text?
Yes. DevKit encodes text as UTF-8 before converting it to Base64, so it works with accented characters, emoji, and other Unicode text.
Is my text uploaded to a server?
No. Base64 encoding and decoding happen locally in your browser. DevKit does not upload or store the text you enter in this tool.
Why does Base64 output end with equals signs?
The equals sign is padding. It can appear at the end of Base64 output to make its length a multiple of four characters, as required by the standard format.