# Base64 Encoder and Decoder > Free Base64 encoder and decoder. Convert text to Base64 and back with full Unicode and emoji support. Everything runs in your browser; nothing is uploaded. Encode any text to Base64 or decode Base64 back to text, right in your browser. Handles emoji and all Unicode correctly, unlike naive encoders that corrupt non-ASCII characters. *Interactive tool: enter your values at https://toollantern.win/base64-encoder-decoder/ and results update instantly in your browser.* ## What the tool does Encode turns text into Base64, the ASCII-safe format used in data URLs, email attachments and API payloads. Decode reverses it. Both directions run entirely in your browser. ## Unicode done right Many online encoders use btoa() directly, which throws on emoji or accented characters. This tool converts text to UTF-8 bytes first, so "Hello, δΈ–η•Œ! πŸš€" encodes cleanly and decodes back byte-for-byte. ## Worked example Encoding **Hello** gives SGVsbG8=. Decoding SGVsbG8= returns **Hello**. The trailing = is padding, which is normal. ## Frequently asked questions ### What is Base64? A way to represent binary data as plain ASCII text using 64 characters (A-Z, a-z, 0-9, + and /). It is used anywhere binary must travel through text-only channels, like email or JSON. ### Why does my Base64 end with = signs? Those are padding characters. Base64 works in 3-byte groups, and the = signs fill out the last group when the input length is not a multiple of 3. They are expected and harmless. ### Is Base64 encryption? No. Base64 is an encoding, not encryption. Anyone can decode it instantly, so never use it to hide passwords or secrets. ### Is my text sent to a server? No. Encoding and decoding happen locally in your browser with JavaScript. Nothing you paste ever leaves your device. --- Interactive version: https://toollantern.win/base64-encoder-decoder/