Base64 Encode & Decode
Quickly encode any text into a Base64 string or decode an existing Base64 value back to readable text. Perfect for data URIs, API tokens, and debugging encoded payloads.
Why use this tool?
Base64 is everywhere in web development — from data URIs and API authentication headers to email MIME attachments. This tool gives you a quick, reliable way to switch between plain text and Base64 without reaching for a terminal or writing a script.
- Unicode-safe — properly handles UTF-8 characters, not just ASCII.
- Instant — results appear as you click, with no page reloads.
- Private — all conversion happens in your browser. Nothing is uploaded.
- Beginner-friendly — clear error messages if a string cannot be decoded.
How to use
- Type or paste your text into the input field.
- Click Encode to convert text to Base64, or Decode to convert Base64 back to text.
- The result appears in the output field below.
- Click Copy Result to copy it to your clipboard.
Frequently Asked Questions
Base64 is commonly used to encode binary data into an ASCII string format. It is used in email attachments (MIME), data URIs in HTML/CSS, API authentication tokens, and embedding images or files in JSON payloads.
No. Base64 is an encoding scheme, not encryption. It does not provide any security or confidentiality. Anyone can decode a Base64 string back to the original text.
Yes. The tool properly handles Unicode characters by encoding them as UTF-8 before converting to Base64, and decoding Base64 back to UTF-8 text.
Yes. All encoding and decoding happens entirely in your browser. Your text is never sent to a server or stored anywhere.