Free Number Base Converter
Convert a number between binary, octal, decimal, hexadecimal and any base from 2 to 36.
Very large integers keep every digit.
- Runs locally
- Enter a number
- Pick its base
- Copy any result
- Free
- No sign-up
- Runs in your browser
- No watermark
- Binary (2)
- 1111 1111
- Octal (8)
- 377
- Decimal (10)
- 255
- Hexadecimal (16)
- FF
- Base 36
- 73
Works with very large integers (BigInt). Prefixes 0x, 0b and 0o are accepted for their own base.
This tool runs in this browser tab and does not ask for an account. What you enter is not sent to PoYo.
Use cases
Where it helps
Quick answers
Open the page and get a result without installing an app.
Any computer
It works in a current browser on Windows, macOS, Linux or ChromeOS.
Nothing to clean up
Close the tab when you are done. PoYo keeps no copy.
Three steps
How to use Free Number Base Converter
Enter a number
Any length; it uses BigInt.
Pick its base
From base 2 to base 36.
Copy any result
Binary, octal, decimal, hex and a custom base.
Features
What this tool includes
Runs locally
This tool runs in this browser tab and does not ask for an account. What you enter is not sent to PoYo.
Enter a number
Any length; it uses BigInt.
Pick its base
From base 2 to base 36.
Copy any result
Binary, octal, decimal, hex and a custom base.
PoYo
Need a new image or video?
These free tools work on files you already have. To create an image, video or audio from a description, open a PoYo generator.
Free Number Base Converter FAQ
Do I need an account?
No. Open the page and use it.
Is what I enter sent anywhere?
This tool runs in this browser tab and does not ask for an account. What you enter is not sent to PoYo.
Does it cost anything?
No. It is free and does not use PoYo credits.
Can I use it on my phone?
Yes, in a current mobile browser. Tools that need a physical keyboard or mouse are easier on a computer.
More free tools like this
All free tools- FREE
Free QR Code Generator
Make a QR code for a link, text, Wi-Fi network or contact name, in any color. Download a PNG; the code is static, so it never expires and has no tracking.
- FREE
Free Barcode Generator
Create Code 128, EAN-13, UPC-A, ITF-14, Data Matrix or Code 39 barcodes in your browser. Download a sharp SVG for labels and packaging.
- FREE
Free Password Generator
Generate a strong random password from 8 to 64 characters, or a four-word passphrase. It uses your browser's crypto API, and nothing is saved or sent.
- FREE
Free Font Generator
Turn your text into fancy Unicode fonts you can copy and paste. Click any style to copy it into Instagram, TikTok or Discord; no font install needed.
- FREE
Free Word Counter
Count words, characters and sentences as you type, with an estimated reading time. See your length against X, Instagram and meta description limits.
- FREE
Free JSON Formatter
Beautify, minify or sort JSON keys in your browser, with errors shown by line and column. Large integers keep their exact digits.
Free to use, right in your browser.
Convert a number between binary, octal, decimal, hexadecimal and any base from 2 to 36. Very large integers keep every digit.