Colour Converter

Every format. One click.

HEX, RGB, HSL, HSB, CMYK. On-device.

#4589FF
HEX
RGB
HSL
° % %
HSB
° % %
CMYK
CSS

CMYK values are approximate — not ICC profile matched.

No upload
Works offline
No idea what's in your data

Need to convert colour palettes in bulk? The offline bundle handles batches with no size limit. $99 once.

Get Bundle →
// How it works

Three steps. Zero uploads.

01
Enter
Type a HEX, RGB, HSL, HSB, or CMYK value. Or pick from the colour picker. It stays on your device.
02
Convert
fwip instantly converts to all formats. All 140 CSS colour names are supported.
03
Copy
Click any value to copy it. Nothing was ever uploaded.
// Why this is different

Your colours stay in your browser.

Colour conversion is a simple calculation, yet many online tools track what you enter. fwip runs everything locally with zero network requests.

fwip works differently. The converter runs entirely in your browser. Your data is read from your device, processed on your CPU, and the result is saved back to your device. No server is involved. We literally cannot see your file.

No server processing

Everything runs on your device using WebAssembly. Your file never touches a network.

No account required

Drop a file. Get a result. No sign-up, no email, no password.

No subscription

Free in the browser. $99 once for the offline bundle. That's it. Forever.

Works offline

The desktop version works with no internet connection at all.

// Questions

Frequently asked.

How do I convert HEX to RGB?▾
Type or paste a HEX colour code into fwip. It instantly shows the equivalent RGB, HSL, HSB, and CMYK values. Everything runs in your browser.
Does fwip support CSS colour names?▾
Yes. fwip recognises all 140 standard CSS colour names and shows the nearest named colour for any input.
How accurate is the CMYK conversion?▾
CMYK values are calculated using a standard formula, not ICC colour profiles. They are approximate and suitable for screen work, not professional print.
// Related tools

You might also need.

DATA
Image to Base64
Convert any image to a Base64 string.
 DATA
JSON Formatter
Format, validate, and pretty-print JSON.
 DATA
QR Code Generator
Generate QR codes. Custom size, colours.
 DATA
Base64
Encode and decode Base64 — text and files.
 DATA
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512.
 DATA
Password Generator
Generate secure random passwords.

Like it? Own it.

Offline. No browser. No internet. No excuses.
$15
This tool
  • Colour Converter · offline
  • Batch processing
  • No file size limit
  • 3 devices · one payment
Join waitlist →
$99
Complete suite
  • All 200+ tools · offline
  • No file size limit
  • No daily use limit
  • 3 devices · one payment · updates included
Join waitlist →
One-time payment · 3 devices · Updates included · Mac + Windows + Linux