Base64 Encoder & Decoder – Encode Files and Text Online Free
Encode text or files to Base64 and decode Base64 strings back to text or files. Supports images and binary files — instant results, no uploads needed.
How to Use
Choose Mode
Select Encode or Decode, then pick Text or File input.
Enter Input
Type or paste text, or upload a file to encode/decode.
Copy or Download
Copy the result to clipboard or download as a file.
Why Use Our Tool?
Text & File Support
Encode/decode both plain text strings and binary files.
Instant Results
See the Base64 output as you type — no button needed.
Copy to Clipboard
One-click copy for the encoded/decoded result.
100% Browser-Based
Uses native browser APIs — nothing is sent to any server.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 printable ASCII characters. It is commonly used to encode data in URLs, emails, and data URIs.
Can I encode files with Base64?
Yes. Upload any file to get its Base64 string. You can also decode a Base64 string back to its original binary file.
Is my data sent to a server?
No. All encoding and decoding happens entirely in your browser using the native btoa/atob functions and FileReader API.
What is the maximum file size for encoding?
There is no hard limit, but very large files may cause the browser to slow down. Files under 10MB work best.