What is the difference between Base64 and Base64URL?
Base64URL replaces + and / with - and _ for safer use in URLs. Padding is optional here, and both variants preserve UTF-8 text.
B64
Developer
Base64 Encoder & Decoder
Paste text or choose a local UTF-8 text file, encode as standard Base64 or Base64URL with explicit padding, or strictly decode either format — all locally.
Text content only; 4 MB file and 1,000,000 Unicode character maximum · processed locally
Format and padding affect encoding only; decoding accepts canonical standard Base64 or Base64URL automatically.
Output
Your encoded or decoded result will appear here.
Three simple steps
How to use Base64 Encoder & Decoder
- 01
Paste content or choose a local UTF-8 text file.
- 02
Choose an encoding format and padding, then Encode; or Decode canonical Base64/Base64URL.
- 03
Copy or download the current text result.
Privacy first
Tool data and site requests stay separate
Tool input and results are processed in temporary state for the current page. The TabPebble application does not send them to a server, write them to a database, or create processing history. Pages and code still load through ordinary network requests. Your browser may restore a tab, while downloads and clipboard copies remain on the device until you remove or replace them.
- No tool-task upload
- No account
- No processing history
FAQ
Frequently asked questions
Is this tool free?
Yes. Core tools are free to use and do not require an account.
Does tool input go to a server?
No. The TabPebble application performs the tool task in your browser and does not put input into site requests; ordinary page and code requests still reach the hosting service.