Developer & Web Tools
Base64 Encoder & Decoder
Encode text to Base64 or decode it back. Full Unicode support, plus URL-safe output.
Privacy
Everything on this page runs inside your browser. Nothing you paste, type or upload is transmitted, logged or stored.
Tips
- Base64 is encoding, not encryption. Anyone can decode it — never use it to hide a password or key.
- It inflates data by roughly 33%, which is why inlining large images as data URIs often makes pages slower.
- The URL-safe variant swaps + and / for - and _ so the result survives being placed in a URL or filename.
Frequently asked questions
Why does my non-English text break in other Base64 tools?
Many tools call btoa() directly, which only handles Latin-1. This one converts to UTF-8 first, so accents, CJK characters and emoji round-trip correctly.