Base64 Encoder/Decoder — Encode & Decode Base64 Online
Free online Base64 encoder and decoder to encode text or files to Base64 format and decode Base64 strings back to original. Supports text, images, and binary data with live conversion. Ideal for data transmission and web development.
Mode
Input Type
Base64 Variant
Example Results
Output will appear here
Base64 Quick Reference
How to Use the Base64 Encoder/Decoder
Choose mode
Select Encode to convert text to Base64, or Decode to convert Base64 back to text.
Select input type
Choose Text for typing or pasting content, or File for uploading a file to encode.
Choose a variant
Select Standard, URL-safe, or MIME Base64 variant depending on your use case.
Copy the result
The output updates automatically. Click Copy to copy the encoded or decoded result.
Frequently Asked Questions
Base64 is commonly used to transmit binary data over text-based protocols like email or HTTP, and to embed images in HTML or CSS.
No. Base64 is an encoding scheme, not encryption. It does not provide any security; it only transforms data into a text-safe format.
URL-safe Base64 replaces + with - and / with _ so the encoded string can be used in URLs and filenames without escaping.
Yes. Base64 encoding increases data size by approximately 33% due to the way binary data is represented as text.
Yes. This tool runs entirely in your browser. No data is sent to any server.
Example Results
Try this sample text
Hello, World!
What you'll see
SGVsbG8sIFdvcmxkIQ==
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