Base64 encoder / decoder
Encode or decode Base64 strings with full Unicode support. Standard and URL-safe variants. Nothing leaves your browser.
Output will appear here…
Guide
Base64 Encoder / Decoder: what it does and how to use it
What this Developer tool does
This Base64 tool encodes and decodes text with Unicode and URL-safe support. Base64 is common in tokens, HTTP headers, basic auth examples, data URLs, and binary-to-text transport formats.
How it works
Enter text to encode or paste Base64 to decode. The tool handles standard and URL-safe variants locally. Base64 is an encoding format, not encryption, so decoded content should be treated as plain text.
Examples
- Decode a Base64 API sample.
- Encode text for a data payload.
- Inspect the parts of URL-safe encoded values.
Security considerations
Do not treat Base64 as secret. Anyone can decode it, and sensitive data should be encrypted or protected by proper access controls.
FAQ
Is Base64 encryption?
No. It is reversible encoding.
What is URL-safe Base64?
It replaces characters that can be awkward in URLs and often removes padding.
Does decoding happen locally?
Yes. Nothing is sent to SAVR.