Base64 Encoder
Encode any text or data to Base64 instantly in your browser. Convert strings for use in data URIs, HTTP headers, email attachments, and APIs
TEXT CODE
Encode Decode
Tip: paste any text on the left — supports Unicode and emoji.
Runs 100% Locally in Your Browser
This tool processes your data entirely on your device. Nothing is uploaded, stored, or sent to any server.
No Uploads
Privacy First
Secure by Default
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Frequently Asked Questions
What is Base64 encoding?
Base64 encodes binary or text data into a set of 64 ASCII characters, making it safe to transmit through systems that only handle text.
How to encode text to Base64 online?
Type or paste your text into the input and the tool instantly outputs the Base64-encoded string.
Why is Base64 used in emails and HTTP headers?
Email protocols and many HTTP headers only support ASCII, so binary data like images and tokens must be Base64-encoded to pass through safely.
What is the difference between standard Base64 and URL-safe Base64?
Standard Base64 uses + and / which are special URL characters; URL-safe Base64 replaces them with - and _ for safe use in URLs and query strings.
Does Base64 encoding make data secure or encrypted?
No. Base64 is an encoding scheme, not encryption — anyone can decode it. Use encryption if you need data confidentiality.
Is the Base64 encoding done locally in my browser?
Yes — the entire encoding operation runs in-browser via the native btoa API; your input is never sent to a server.