Base64 Encode / Decode
Encode and decode Base64 with full UTF-8 support — all in your browser.
Output will appear hereProcessed in your browser — nothing is sent.
About this tool
Base64 Encode/Decode is a free tool for base64 encode and base64 decode that developers reach for constantly. Base64 is a way of converting data (text or files) into a standard set of text characters that travels safely through systems that only accept text, such as embedding an image into CSS or HTML as a data URI, attaching data in an API header, or passing a value through a URL.
It is straightforward to use: paste your text and choose whether to encode it into Base64 or decode it back to the original. A key strength is that it handles UTF-8 correctly. Many tools garble characters the moment they hit non-ASCII text like Thai or emoji, but this one manages the encoding properly, so the decoded result always matches the original exactly.
One thing to understand clearly: Base64 is not encryption. It is only an encoding. Anyone who receives a Base64 string can decode it straight back to the original data. So never use Base64 to hide a password, a token, or any secret. If you need real protection, you need encryption with a key.
On privacy, this tool runs entirely in your browser. The text you paste is never uploaded to any server, so it stays safe even when you decode confidential content. It is free, needs no signup, and requires no installation. Open it on any device and start right away.
How to use
- 1Paste or type the text you want to convert into the input box
- 2Click Encode to turn it into Base64, or Decode to turn Base64 back into the original text
- 3It handles Thai and all UTF-8 characters correctly, so nothing gets garbled
- 4Copy the result and use it right away
Frequently asked questions
- What is Base64?
- Base64 is a way of representing data as a safe set of text characters for transport. It is commonly used to embed images in code, pass data through URLs, or include it in API headers.
- Is Base64 as secure as encryption?
- No. Base64 is only an encoding, and anyone can decode it back. Do not use it to hide passwords or secrets. For real confidentiality, use proper encryption with a key.
- Does it really support non-ASCII text?
- Yes. The tool handles UTF-8 correctly, so it encodes and decodes Thai, emoji, and other characters without corrupting them.
- Is the text I paste sent to a server?
- No. Everything runs in your browser and your data never leaves your device, so it is safe even for confidential text.
- Is it free to use?
- Yes, it is free with no signup, and you can encode and decode as much as you like.