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How to Use This Tool
Base64 is a text encoding scheme that represents binary data using only 64 printable ASCII characters. It is widely used for embedding small images in CSS and HTML as data URLs, for attachments in email, for payloads inside JWT tokens, and anywhere that binary bytes need to travel through a text-only channel. This tool encodes and decodes Base64 entirely in your browser — nothing is sent to a server.
How to Use
- Pick Encode or Decode at the top.
- Paste or type your text into the input field. Emoji and international characters work because the tool wraps input in UTF-8 first.
- Click Convert — the result appears below.
- Click Copy to put the output on your clipboard, or Clear to start over.
Frequently Asked Questions
What is Base64?
Base64 is an encoding that represents any binary data (images, files, bytes) as a string of 64 safe characters: A–Z, a–z, 0–9, plus "+" and "/". It lets binary content travel through systems that only handle text.
When is Base64 used?
Most commonly: inline images in HTML/CSS (data URLs), email attachments (MIME), authentication tokens (the middle part of a JWT), and API payloads that carry binary blobs as JSON values.
Is Base64 encryption?
No. Base64 is encoding, not encryption. Anyone can decode it instantly. Never use Base64 to hide passwords or secrets — it offers zero security.
Can it handle emoji and non-ASCII?
Yes. This tool first encodes input as UTF-8 before Base64, so emoji, accented characters, Chinese/Japanese/Korean text and other Unicode all round-trip correctly.