Igor's Blog
Programming, DIY, Games, Hacks, and Tech

Base64 encoding is used in quite a few places and there are many online web sites that let you encode or decode Base64. I am not very comfortable using such sites for security and privacy reasons so I went looking for alternative solutions. Whether you're using Linux, Windows or macOS you can use built-in tools to both encode or decode Base64 data. So ditch any online sites and start using software that is installed locally on your computer. Here's how.

You will need to do all of this via the command line. Given you're already dealing with Base64 data I am going to assume you know how to bring that up on your operating system. Scroll down to the relevant section based on your OS below, also substitute your file names as appropriate.

I am going to use .txt for the decoded data file extension and .b64 for the Base64 encoded file extension.

Linux
 Encode a data file to Base64
base64 data.txt > data.b64

 Decode a Base64 file
base64 -d data.b64 > data.txt


Windows
 Encode a data file to Base64
certutil -encode data.txt tmp.b64 && findstr /v /c:- tmp.b64 > data.b64

 Decode a Base64 file
certutil -decode data.b64 data.txt


Note: encoding with the above command will leave a temporary file, tmp.b64, on your file system. If you do not wish to have that file present simply add this to the end of the command: && del tmp.b64



macOS
 Encode a data file to Base64
base64 -i data.txt -o data.b64

 Decode a Base64 file
base64 -D -i data.b64 -o data.txt


-i

comments powered by Disqus
Other posts you may like...

Recent Blog Posts

A hack to create an uber jar with the Maven Shade Plugin using local jar files

Is it worth it? Apple USB-C Digital Multi AV adapter vs a cheap eBay clone

Running X11 graphical applications after changing to another user using 'sudo su'

How to stop Facebook using ad images as post sharing thumbnails

Picking lists for Atari Lynx capacitor replacement kits

Performance - 2012 Retina MacBook Pro vs 2017 MacBook Pro

Look and feel - 2012 Retina MacBook Pro vs 2017 MacBook Pro

Using math to work out the diameter of hard to reach water cooling pipes

How to get the unreachable shard in the Hinterlands in DragonAge Inquisition

Measy RC12 wireless 2.4Ghz keyboard touchpad review

Recent Galleries

Monument Valley 2 is released and does not disappoint

Space Food - Chocolate Ice Cream with Chocolate Chips

Legeod Star Wars AT-DP kit

DIY spare parts computer build with a RAIDMAX Anura case

Fake 'Lepin' brand Lego packaging

Hardwood garden bench with clear resin void filler

Fixing a 3D printer extruder that stopped heating up

Easily increase disk space in a Lenovo Ideapad 100S 14" laptop with an M.2 SSD

Making a multi-piece 3D printed solder spool holder stand

DIY indoor apartment grow light wiring

My Other Web Sites

Igor and Elise's Travels
Riverside Expressway Cam
300 George St Blogumentary

My Online Tools

UUID to OID Converter
Guru JSON-RPC Tester
Extrudifier Object Designer
Travel ┬ÁBlog

Blogs and Friends

Matt Moores Blog
Georgi's FlatPress Guide
Perplexing Permutations
The Security Sleuth
Ilia Rogatchevski
Travelling Fairy

Blog Activity

Blog Activity
Don't forget to
me for more great articles!
Don't show this again