Change Integer Base
Convert integers to a custom base. 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 Change Integer Base
- 1. Paste the integers to convert. Enter one or more integers, each written in the base you specify as the source. Separate multiple values with spaces, commas or newlines.
- 2. Set the From base and To base. Enter the numeric base your input is written in as From base, and the base you want it converted to as To base. Both accept any base from 2 up to 36.
- 3. Copy the converted values. Copy the converted digits from the output pane. Each input line maps to one output line in the target base, in the same order they were entered.
When to use Change Integer Base
Change Integer Base converts whole numbers between arbitrary numeric bases, not just the common binary, octal, decimal and hex pairs. Use it whenever you need a base that isn't covered by a dedicated converter, such as base 7 or base 20.
- Working with a non-standard numbering system. A puzzle, cipher, or legacy system encodes values in base 7 or base 20 instead of a common base. Set From base and To base to the exact values needed and convert directly.
- Verifying a custom base conversion routine. You wrote a function to convert between two arbitrary bases and want an independent check on the output. Run the same input through this tool and compare results.
- Teaching positional number systems. A lesson on how place value works in bases other than 10 is more concrete when students can convert their own examples between, say, base 5 and base 12 on the spot.
- Decoding values from an unusual file format. Some legacy or embedded formats store integers in bases like base 32 or base 36 for compactness. Convert them back to decimal here to work with the values normally.
Examples
Decimal to binary
Input
255
Output
11111111
Binary to octal (from base 2, to base 8)
Input
1010
Output
12
About the Change Integer Base tool
Change Integer Base is a free online tool that works entirely inside your web browser. Convert integers to a custom base. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 133 Integer utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with 2 settings, including From base and To base, and the result refreshes the moment you change one. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Change Integer Base 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.