Tools
Free tools for web developers
Encoders, formatters, color utilities, a code playground, and more — all running in your browser, no install or signup needed.
General Tools
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HTML Editor
Live HTML/CSS/JS editor with preview.
Password Generator
Strong, unique passwords on demand.
- ⇄
HTML Encoder
Escape HTML entities both ways.
- ±
Code Diff
Side-by-side diff for any two snippets.
- {}
JSON Beautifier
Pretty-print and validate JSON.
- .css
CSS Beautifier
Tidy stylesheets, shorthand, sort properties.
- md
Markdown Converter
Convert Markdown to HTML on the fly.
- #
Number Converter
Binary, octal, decimal, hex — all directions.
- JWT
JWT Decoder
Decode, verify, and inspect JSON Web Tokens.
Browser feature detection
Check what's supported in your browser.
Phrase encrypt / decrypt
Symmetric phrase encryption made simple.
- B64
Base 64 Converter
Encode / decode text and files.
Tailwind Color finder
Find the nearest Tailwind class for any color.
Color Tools
10Color Picker
Pick colors and grab any format.
- #→
Color Converter
Switch between HEX, RGB, HSL and more.
Color mixer
Blend any two colors to find the in-between.
- #
Color Hex
Hex codes with RGB breakdown and shades.
Colors HSL
Explore colors by hue, saturation, lightness.
Colors HWB
Hue, whiteness, blackness — the CSS4 notation.
Colors CMYK
Print-ready CMYK values for any color.
- RGB
Colors RGB
RGB channels, previews, and conversions.
Color Contrast Analyzer
WCAG contrast checker for text and UI pairs.
Color Gradient
Compose multi-stop gradients with copyable CSS.
String Tools
19String Length Calculator
Count characters in any text instantly.
- MD5
MD5 Hash Generator
MD5 digest of any string, one click.
- SHA
SHA-256 Hash Generator
SHA-256 digest of any string.
String Reverse
Flip any string back to front.
- %
URL Encoder
Percent-encode text for safe URLs.
URL Decoder
Turn percent-encoded URLs back into text.
- →64
Base 64 Encoder
Plain text in, Base64 out.
- 64→
Base 64 Decoder
Base64 in, plain text out.
- ␣
Extra Spaces Remover
Collapse repeated whitespace in one go.
- ab
String to Lowercase
Convert any text to lowercase.
- AB
String to Uppercase
Convert any text to UPPERCASE.
- 123
Word Count Calculator
Words, characters, and lines — counted live.
- ¶
Empty Lines Remover
Strip blank lines from any text.
HTML Tags Remover
Strip markup, keep the plain text.
- 0x
Binary to Hex
Binary numbers to hexadecimal.
- 01
Hex to Binary
Hexadecimal numbers to binary.
ROT13 Transform
Apply the classic ROT13 letter cipher.
- 0b
String to Binary
See any text as its binary representation.
Duplicate Lines Remover
Dedupe repeated lines, keep the first.