Base62 Encode & Decode
A full alphanumeric encoding (0–9, A–Z, a–z) that is URL-friendly. 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
5TP3P3v
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 Base62
Base62 uses 62 characters: 0–9, A–Z, and a–z. With no special symbols at all, it is very URL-friendly and ideal for URL shorteners and short IDs.
How it works: the data is treated as a large number and converted to base 62. The result is more compact than Base36 (because it uses both upper and lower case) yet remains symbol-free.
Base62 is a popular choice for building short link codes (like those used by URL shortener services) and tokens that paste cleanly into URLs without escaping.
FAQ
Can this Base62 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. Base62 is processed entirely in your browser. The text you enter never leaves your device.