Base64 Encode & Decode
Convert text to and from Base64 instantly. Everything runs in your browser — nothing is ever sent to our servers.
Base64 FAQ
What is Base64 encoding? ＋
Base64 is a method to represent binary data using only text (A–Z, a–z, 0–9, +, and /). It makes data safe for text-only systems like email or JSON.
Is Base64 encryption? ＋
No. Base64 is just encoding, not encryption. Anyone can decode it back. For sensitive data, always use proper encryption.
Why does Base64 increase size? ＋
Base64 output is about 33% larger than the original data because 3 bytes are encoded into 4 printable characters.
Can I decode Base64 images? ＋
Yes. Many images online use Base64 data URIs. Paste the string into this tool and you’ll get the original binary back.
Is this Base64 tool secure? ＋
Yes. Everything runs 100% in your browser. No data is sent to our servers.