About
A fast, private, no-nonsense tool for converting text and files to and from Base64 — right in your browser.
What this is
This website is a free online Base64 encoder and decoder. Paste text to convert it to Base64, switch to decode to reverse it, or drop in a file to get its Base64 representation. It supports UTF-8 and ASCII, URL- and filename-safe output, and per-line conversion.
Privacy by design
Everything runs locally with JavaScript. The content you convert never leaves your device — there are no uploads, no server-side logging, and no accounts. That makes it safe for sensitive snippets and quick everyday tasks alike.
Why we built it
Most Base64 tools online are cluttered, slow, or push your data through a server. We wanted something clean, instant, and genuinely client-side — the kind of focused utility that respects your time and your data.
What you can do with it
- Encode text or whole files to Base64
- Decode Base64 back into readable text
- Switch between UTF-8 and ASCII character sets
- Produce URL- and filename-safe output for tokens and links
- Convert each line separately, copy, or download results
More developer tools
Need to work with JSON? Try our companion app JSON Editor Studio ↗ — edit, validate, compare, and generate JSON online.