Base64 Encoder / Decoder Studio
Encode plain text or uploaded files to Base64, URL-Safe Base64, Hex, and HTML Data URIs, or decode Base64 strings back to text.
Free Online Base64 & URL-Safe Encoder & Decoder
Convert UTF-8 text strings, binary files, or credentials into standard RFC 4648 Base64 or URL-Safe Base64 (using - and _ without padding). Includes live auto-processing, byte stats, Hex conversion, and file upload.
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using 64 printable characters (A-Z, a-z, 0-9, +, /). It is widely used to embed images in CSS/HTML, transmit binary payloads over JSON APIs, and encode HTTP Basic Authentication credentials.
How to use it
- Paste your text string into the Input box or upload a binary file.
- Select the Encoding Variant (Standard, URL-Safe, Data URI, or Hex).
- Click Encode to Base64 to encode or Decode Base64 to restore plain text.
- Copy the output to your clipboard or download it as a
.txtfile.
Frequently Asked Questions (FAQ)
What is URL-Safe Base64?
URL-Safe Base64 replaces the + character with - and the / character with _, and removes trailing = padding characters so the string can be safely passed in URL query parameters and JWT tokens without percent-encoding.
Does Base64 increase file size?
Yes. Base64 encoding increases data size by approximately 33% because 3 raw binary bytes (24 bits) are converted into 4 ASCII characters (32 bits).
Is Base64 encryption or security?
No. Base64 is an encoding format, NOT encryption. Anyone can decode a Base64 string instantly. Never rely on Base64 alone to protect passwords or secret keys.
SEO & Web Development Applications
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