Unlimited Size Number's Base Converter
Change base of very big numbers (no size limit, work with more than 1 trillion digits if you want).
Compressing time is linearly proportional to the number of digits.
Warning: Risks of speed decrease if this page is not the main process.
Number to convert (From)
Converted number (To)
Alphabet: Base:
Alphabet: Base:


Converter fully developed by Nathaël Noguès, since October 2015.
https://github.com/NatNgs/bnbc
Ver. Date Description
1.4 August 2018 Added buttons to set source and destination alphabet to all printable ASCII characters
1.3 July 2018 Added button to add all characteds from alphabet source to alphabet destination
Added Sort Alphabet button
1.2 February 2018 Added Encoder and Decoder
Added Shuffling alphabets buttons
1.1 January 2018 Optimizations: almost 30x faster than 1.0
Added Fill Alphabet button
1.0 October 2015 First release