Developer

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

Turn a link, text, Wi-Fi password, contact card, e-mail, phone number or location into a custom QR code. Download as PNG or SVG.

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

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.

Turn a link, text, Wi-Fi password, contact card, e-mail, phone number or location into a custom QR code. Download as PNG or SVG.

Decode a QR code from any image right in your browser — no upload required.

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

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

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

Create linear gradients visually and copy the ready-to-use CSS code.

Round box corners visually and copy the border-radius CSS in one click.

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

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

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

Converts JSON to XML and XML to JSON in both directions with arrays and attributes supported.

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

Parse messy CSV, preview it as a table and copy it as TSV.

Beautifies or minifies SQL queries with your choice of keyword casing and indentation.

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

Converts Markdown to HTML and HTML back to Markdown with a live preview.

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

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

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

Break any URL into protocol, host, path, query, hash and more.

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

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

Convert text to UTF-8 binary and binary back to readable text instantly.

Convert file and storage sizes between bytes, KB, MB, GB and TB.

Convert between px, rem, em, %, vw and vh CSS units instantly.

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

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

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.

Computes HMAC-SHA256 or HMAC-SHA512 signatures and shows them in hex and Base64.

Escape text as a JSON or JavaScript string, or decode escaped values.

Remove blank lines, indentation and whole-line comments from JavaScript.

Build Unix file permissions visually and copy the numeric or symbolic mode.

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

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

Generates ready-to-paste HTML table code from rows, columns and pasted data with a live preview.

Browse common HTTP status codes and their meanings, grouped by class.

Look up the MIME type for common file extensions or search by type.

Create a pure CSS triangle with a chosen direction, size and color.