Base64 Toolkit — Encode, Decode & Convert Files
The complete Base64 toolkit for developers. Encode text, decode Base64 strings, and convert files to/from Base64 — all client-side.
Developer Export Templates
Generate reusable code snippets for your project
Raw
Web
Data
Programming Languages
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HTML <img>
Embeds a Base64 image directly into an HTML img tag. No external files needed.
Use Cases
- •Email signatures
- •Offline HTML pages
- •Small icons and logos
- •Single-file prototypes
Notes
Avoid for large images — external files load faster.
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used to embed images, files, or other binary data within text-based formats such as HTML, CSS, JSON, or XML. Our online Base64 encoder and decoder tool lets you instantly convert plain text to Base64 or decode Base64 strings back to readable text. All operations are performed client-side in your browser, meaning your data never leaves your device. The tool supports Unicode characters (including Chinese, Spanish accents, and emoji) through proper URI encoding.
FAQ
Why use Base64 encoding?
Base64 encoding is useful when you need to transmit binary data over media that only supports text. Common use cases include embedding images in HTML emails, storing binary data in JSON, and encoding authentication credentials in HTTP headers.
Does Base64 compress data?
No, Base64 is not a compression algorithm. In fact, Base64 encoding increases data size by approximately 33%. It is purely an encoding scheme to make binary data safe for text-based transport.
Does your tool support UTF-8 and Unicode?
Yes. Our Base64 tool uses encodeURIComponent and decodeURIComponent to properly handle Unicode characters including Chinese, Japanese, Arabic, Spanish accents, emoji, and any other UTF-8 text. This ensures your encoded data remains intact across different systems.
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