Base64 Encoder / Decoder

Encode text or a local file to a Base64 string, or decode one back. UTF-8 is handled correctly, so Chinese and emoji survive round trips.

Input Result

How to use

Convert text or files to Base64 and back, with correct UTF-8 handling. Your data is processed only inside this browser tab.

Why does another tool break my Chinese text?

Many tools use binary (latin1) encoding. This one uses UTF-8 bytes, the web standard.

Are files uploaded?

Never. File reading happens locally with the browser File API.

Beautify, minify and validate JSON right in your browser. No uploads, nothing leaves your device.

Convert Unix seconds or milliseconds to dates and back, in your timezone or UTC.

Compress JPG / PNG / WebP locally.

Convert IP ranges to the smallest CIDR set (IPv4/IPv6).

Live matches, groups and replace preview.

Local entropy-based password generation.