Base45 Encode a String
Encode a string to Base45. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Base45 Encode a String
- 1. Paste the text to encode. Enter the plain text you want converted into the input pane. Base45 works on any UTF-8 text, from a short code to a longer payload.
- 2. Read the Base45 output. The tool encodes your text's bytes using the 45-character Base45 alphabet, which includes digits, uppercase letters and a handful of symbols, and shows the result immediately.
- 3. Copy the encoded string. Copy the Base45 result and embed it wherever a QR-friendly, alphanumeric-mode encoding is expected, such as a certificate payload or custom QR generator.
When to use Base45 Encode a String
Base45 Encode a String converts plain text into the Base45 alphabet defined in RFC 9285. Base45 exists specifically because its character set maps efficiently onto QR code alphanumeric mode, making encoded payloads more compact inside a QR image.
- Preparing data for a QR code. You are generating a QR code and want the embedded payload encoded in Base45 first, since it packs more information per QR module than Base64 would.
- Building a digital certificate prototype. You are prototyping something similar to an EU Digital COVID Certificate and need sample data encoded in Base45 the same way the real specification requires.
- Testing a Base45 library port. You ported a Base45 encoder to a new language and want to compare its output against a known-good reference encoding of the same input string.
- Documenting an encoding pipeline. A technical write-up about QR-based credentials needs a concrete before-and-after example of a string passing through Base45 encoding for readers to follow along.
Examples
Encode Hello
Input
Hello
Output
%69 VDL2
About the Base45 Encode a String tool
Base45 Encode a String runs as plain JavaScript in your browser tab, with no server behind it. Encode a string to Base45. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's String Tools section, 159 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
There is nothing to configure. Provide the input and the result appears on its own. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Does Base45 Encode a String cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.