Free tools
Encode and decode Base64 strings instantly.
Runs locally · nothing is uploaded
Result appears here…Text is encoded as UTF-8, so accents, Cyrillic, Chinese and emoji survive the round trip.
Encode plain text or decode a Base64 string back to text, from the same box.
Tokens and credentials you decode are never sent anywhere: it all runs in your browser.
Base64 writes any data using only 64 safe characters (letters, digits,
This tool encodes text to Base64 and decodes it back, treating your text as UTF-8 so that every language comes out exactly as it went in.
This tool is built by ToolClack and, like everything we make, it is local-first: your data stays in your browser.
No. Base64 only changes how data is written, it does not hide it: anyone can decode it. Never rely on it to protect secrets.
Yes. Text is converted to UTF-8 bytes before encoding and back after decoding, so any language works.
The input contains characters that are not part of standard Base64, or its length is wrong. URL-safe Base64 (with - and _) needs those two characters swapped for + and / first.
No. Encoding and decoding happen in your browser.
These tools are free and always will be. Our full products go further.
View all products