Free Developer Tools — Online Tools

Format and beautify JSON code

Validate JSON syntax and structure

Format and beautify HTML code

Minify CSS code to reduce file size

Minify JavaScript code

Test and debug regular expressions

Encode or decode Base64 strings

Encode or decode URLs

Convert HTML to Markdown format

Strip HTML tags and extract plain text

Generate barcodes for any product or data

Generate QR codes for URLs, text, and more

Create favicons from images or text

Pick colors and convert between HEX, RGB, HSL

Capture screenshots of any website

Convert Markdown text to HTML with live preview

Decode and inspect JWT header and payload

Convert between Unix timestamp and ISO date

Format and beautify SQL queries

Generate UUID v4 and ULID identifiers

Build linear and radial CSS gradients visually

Visual playground for CSS flexbox layouts

Visual playground for CSS grid layouts

Generate color palettes from a base color

Check WCAG AA/AAA contrast ratios for accessibility

Validate YAML syntax and indentation

Format and beautify XML documents

Build and translate cron schedule expressions