Base36 Encode & Decode
A compact alphanumeric encoding (0–9, a–z). This tool does both encode and decode on one page — just pick a mode, paste your text, and click. Everything runs on your device, nothing is sent to a server.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
Hello
Example Output
3yud78mn
How to Use
- 1Choose Encode or Decode mode at the top.
- 2Type or paste your text into the Input field.
- 3Click the button (or press Ctrl+Enter) to process. The result appears in the Output field.
- 4Click Copy to copy the result, or "Swap input/output" to quickly reverse the operation.
About Base36
Base36 uses 36 symbols: digits 0–9 and letters a–z. It produces a purely alphanumeric string with no special symbols, making it safe in URLs, IDs, and filenames.
How it works: the data is treated as a large number and converted to base 36. The result is more compact than hexadecimal while still containing only URL-friendly characters.
Base36 is often used to build short IDs, slugs, or unique codes from numbers, because it is dense and easy to type with no confusing characters.
FAQ
Can this Base36 tool both encode and decode?
Yes. This is a single page with a toggle — use Encode mode to transform text, and Decode mode to reverse it. No need for two separate pages.
Is my data sent to a server?
No. Base36 is processed entirely in your browser. The text you enter never leaves your device.