Free Developer Tool
Securely encode strings to Base64 or decode them back to readable text in real-time.
Plain text or file
Base64 output
How It Works
Encode text/file to Base64, or decode Base64 to text
Type text, paste a string, or drag & drop a file
Output updates instantly as you type
Copy to clipboard or swap output back as new input
FAQ
Base64 is an encoding scheme that converts binary data into a string of ASCII characters. It is commonly used to embed images in HTML or CSS, pass data in URLs, and transfer binary data over text-based protocols like email or JSON.
Standard Base64 uses + and / characters that have special meaning in URLs. URL-safe Base64 replaces + with - and / with _ so the encoded string can be safely included in a URL or filename without encoding.
No. Base64 expands data by roughly 33%. It is an encoding scheme for safe transmission, not a compression format. Use gzip or Brotli if you need to reduce file size.
No. Base64 is encoding, not encryption. Anyone can decode a Base64 string without a key. Never use Base64 to hide sensitive data — use proper encryption like AES instead.