Developer

Formats, validates and prettifies JSON code; reports syntax errors with line numbers.

Converts text to Base64 or decodes Base64 data back to its original content.

Encodes text into URL-safe form or decodes encoded URL parameters into readable form.

Turns text or a link into a QR code instantly in your browser; download it as PNG.

Converts between HEX, RGB and HSL instantly with a live preview and one-click copying.

Generates random UUID v4 (GUID) identifiers in one click; copy several at once.

Converts numbers between binary, octal, decimal and hexadecimal instantly in your browser.

Tests a regular expression against your text live and highlights every match.

Decodes a JWT into its header, payload and signature, shown as readable JSON.

Converts JSON to CSV and CSV to JSON with correct quoting in both directions.

Converts Unix timestamps to readable dates and dates back to Unix timestamps.

Estimates the token count of your text for AI and LLM context limits.

Calculates network, broadcast, netmask and host counts for an IPv4 subnet.

Converts pixels to rem and rem to pixels live with a base font size you choose.

Formats and minifies XML code in your browser with one click.

Minifies CSS code by stripping comments and redundant whitespace to shrink file size.

Minifies HTML by removing comments and collapsing whitespace between tags while preserving its content.

Checks the contrast ratio between two colors against all WCAG AA and AAA requirements.

Creates analogous or monochrome color palettes from a base color and copies any HEX at a click.

Builds box-shadow CSS with sliders for offset, blur, spread and opacity, and a live preview.

Converts YAML data to JSON and JSON back to YAML in both directions.

Validate each cron field, read what it matches in plain language, and get the next five run times.

Beautify HTML with clean two-space indentation while preserving raw pre, script and style blocks.

Encrypt and decrypt text with AES-GCM 256 using a password-derived PBKDF2 key — entirely in your browser.

Generate secure random strings with the character sets and length you choose, powered by crypto-grade randomness.

Create signed HS256 JWT tokens from your own header, payload and secret — instantly, in your browser.