Base64 Encoder/Decoder
Encode and decode Base64 strings with support for text, files, and advanced options. Safe, fast, and completely free.
Encode Text to Base64
Enter your text below to encode it to Base64 format. Perfect for encoding data for safe transmission or storage.
Decode Base64 to Text
Enter your Base64 encoded string below to decode it back to readable text.
File Base64 Converter
Upload files to encode to Base64 or decode Base64 files back to their original format.
Click or drag files here
Maximum file size: 10MB
About Base64 Encoding
Safe Data Transmission
Base64 encoding converts binary data to ASCII text, making it safe for transmission over text-based protocols like email and HTTP.
Universal Compatibility
Base64 is widely supported across all programming languages and systems, making it perfect for data interchange.
Multiple Use Cases
Used in email attachments (MIME), data URLs, JSON Web Tokens (JWT), and embedding images in HTML/CSS.
Data Integrity
Ensures data remains intact during transport by converting it to a format that won't be modified by text processing systems.
Base64 Converter Features
Lightning Fast
Process large files and text instantly with optimized encoding/decoding algorithms.
100% Secure
All processing happens in your browser. No data is sent to our servers.
File Support
Upload and process files of any type up to 10MB in size.
Advanced Options
URL-safe encoding, MIME chunking, and multiple character set support.
Mobile Friendly
Works perfectly on all devices and screen sizes.
Download Results
Save your encoded/decoded results as files for later use.
Base64 Encoder/Decoder FAQ
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data as printable ASCII characters. It's commonly used for transmitting data over text-based protocols.
When should I use Base64 encoding?
Use Base64 when you need to transmit binary data over text-based systems like email, JSON, or when embedding images in HTML/CSS as data URLs.
What is URL-safe Base64?
URL-safe Base64 (Base64URL) replaces '+' with '-' and '/' with '_', making it safe to use in URLs without percent-encoding.
Is Base64 encoding secure?
Base64 is not encryption - it's just encoding. The original data can be easily decoded by anyone. Use encryption if you need security.
What is MIME Base64?
MIME Base64 splits encoded data into 76-character lines for email compatibility, as specified in RFC 2045.
Can I process large files?
Yes, our tool supports files up to 10MB. Processing happens in your browser for security and privacy.