URL Safe Base64 Converter
Convert standard Base64 to URL-safe Base64 and back in your browser.
Standard ↔ URL-safe Base64
Standard Base64 uses + and / characters that break inside URLs, so URL-safe Base64 swaps them for - and _. Moving between the two variants by hand is fiddly. This converter switches standard Base64 to URL-safe and back in your browser.
It is exactly what you need when a token or payload has to travel in a URL or filename. Paste a value, pick the direction, and copy the converted result — with padding handled so both forms stay valid.
Private and instant
Everything runs locally in your browser using standard web APIs — nothing is uploaded, logged, or stored on any server — so the tool works offline, responds instantly, and keeps whatever you paste in on your own device. That makes it safe to use even for confidential, client, or internal data you would never send to an unknown website.
Frequently Asked Questions
What does the url safe base64 converter do?
It processes pasted developer text in your browser and writes a usable result to the output panel.
Does this send code or data to a server?
No. The tool runs client-side in your browser and does not upload your input.
What are the limits?
It is designed for everyday snippets, configuration values, and small files rather than huge production datasets.
Is this free?
Yes. It is a free browser utility with no account required.
Practical utilities for everyday web development work.