ToolbitBase64 Encoder and Decoder
Encode a string to Base64 or decode one back, including URL-safe variants and full Unicode. Because everything runs locally, decoding a credential or signed payload is safe to do at your desk.
What the Base64 Encoder & Decoder does
- Two-way conversion with instant results as you type.
- URL-safe alphabet for JWT segments and query parameters.
- Correct UTF-8 handling for emoji and non-Latin scripts.
- Clear errors when the input is not valid Base64.
How to use it
- Paste text or a Base64 string into the input panel.
- Choose encode or decode, and toggle URL-safe if you need it.
- Copy the result, or pipe it into the JWT decoder or hash generator.
Why it runs locally
Toolbit has no backend. The Base64 Encoder & Decoder is implemented with standard browser APIs, so your input is processed in the tab and never uploaded, logged, or retained. That is what makes it safe to paste real data into — and it is also why the tool keeps working with the network disconnected, once you have installed Toolbit as an app.
Frequently asked questions
- Is it safe to decode secrets here?
- No. Every Toolbit tool runs entirely in your browser using standard Web APIs. Your input is never uploaded, logged, or sent to a third party — you can open the network tab and watch it stay quiet.
- What is URL-safe Base64?
- It replaces + and / with - and _ so the value survives inside URLs and JWT segments. Toolbit encodes and decodes both alphabets.
- Does it support Unicode?
- Yes. Text is encoded as UTF-8 first, so emoji and non-Latin characters round-trip correctly.