Base64 Encoder / Decoder
Encode and decode text strings and binary files to and from standard or URL-safe Base64 with UTF-8 Unicode support.
Drop a file here
or click to browse — any file type supported
How to Use Base64 Encoder / Decoder
- Select Mode: Choose whether you want to Encode text, Decode Base64, or convert a File into a Data URI.
- Enter Content: Type or paste your text or upload a file into the active workspace tab.
- Toggle URL-Safe Option: Optionally check 'URL-Safe Base64' to use '-' and '_' instead of '+' and '/'.
- Copy or Download: Click 'Copy' to paste the resulting string into your codebase, or 'Download' to save as a text file.
Frequently Asked Questions
Does this Base64 tool support non-English characters and emojis?
Yes! We use native TextEncoder and TextDecoder streams with full UTF-8 byte mapping, preventing standard ASCII encoding crashes on emojis, Arabic, Cyrillic, Chinese, and other Unicode text.
What is URL-Safe Base64 (base64url)?
Standard Base64 contains '+' and '/' characters which carry special meaning in URLs and query strings. URL-safe Base64 substitutes '+' with '-' and '/' with '_', and omits trailing '=' padding.
Can I convert images and binary files to Base64 Data URIs?
Yes! Switch to the 'File → Data URI' tab and drop any image or file to generate an inline 'data:mime/type;base64,...' string.
Is Base64 an encryption algorithm?
No. Base64 is a binary-to-text encoding format, not encryption. Encoded strings can be decoded by anyone without a cryptographic secret.
What is the maximum string size supported?
Our client-side engine can encode and decode text strings and binary buffers up to 20 MB without server latency.
Are my encoded credentials safe?
Yes, all encoding and decoding execution happens locally in your browser session with zero server communication.