I built a Base64 encoder that doesn't phone home

I've been meaning to build a proper Base64 tool for ages. Every time I need to quickly encode or decode something, I'm stuck either writing a tiny script or using some sketchy site that might be logging my data. So I built one: Base64 Encoder/Decoder What it does Encode any text to Base64 instantly Decode Base64 back to plain text URL-safe mode (replaces + with - and / with _ ) One-click copy to clipboard 100% client-side — nothing ever leaves your browser Why I care about the "no server" part A lot of online Base64 tools send your input to a backend. For most use cases that's fine — but if you're dealing with tokens, API keys, or anything vaguely sensitive, you probably don't want that. This tool runs entirely in your browser. There's no server receiving your input. The code is vanilla JS, no frameworks, no build step — you can literally read the source by pressing Ctrl+U. The URL-safe variant Standard Base64 uses + and / which break when you put them in URLs or filenames. URL-safe Ba