Base64 string
Encode and decode Base64 in URL-safe and standard alphabets.
Also known as: Base64 encoder, Base64 decoder.
100% offline · macOS, Windows & Linux · free for personal use
// overview
What it does
Base64 string is one of 55 tools in Hexkit, a desktop developer toolbox that runs entirely on your own machine. Encode and decode Base64 in URL-safe and standard alphabets.
Because Hexkit is a native app rather than a web page, anything you paste into the base64 string stays local — there are no uploads, no accounts and no telemetry. You can decode tokens and inspect encoded data even with the network turned off, which makes it safe for tokens, keys and production data.
// steps
How to use Base64 string
- 1
Open Hexkit and select "Base64 string", or press the command-palette key and start typing its name.
- 2
Paste the text or token you want to encode or decode. Encode and decode Base64 in URL-safe and standard alphabets.
- 3
Read or copy the result. Everything is computed locally by Hexkit's Rust core, so nothing is ever uploaded.
Tip: the command palette opens any tool in one keystroke.
// faq
Frequently asked questions
- Is Base64 string free?
- Yes. Base64 string is part of Hexkit, which is free for personal and non-commercial use on macOS, Windows and Linux.
- Does Base64 string work offline?
- Completely. Hexkit runs every tool locally with no network access, so Base64 string works on a plane or an air-gapped machine.
- Is my data uploaded anywhere?
- No. Hexkit makes no network calls and has no telemetry — whatever you paste stays on your computer.
- Does it support URL-safe Base64?
- Yes. You can switch between the standard alphabet and the URL- and filename-safe alphabet (RFC 4648 §5), with or without padding.
// keep going
Related tools
Use Base64 string without sending your data anywhere.
Base64 string ships inside Hexkit — a free, offline developer toolbox for macOS, Windows and Linux. No account, no uploads.