Utilities for developers — format and validate JSON/HTML/CSS/SQL, encode and decode, test regex, build CSS and cron expressions, generate git/docker commands, and more.
Format, validate and minify JSON with error locations and highlighting.
Encode and decode text or files to and from Base64, UTF-8 safe.
Encode and decode URLs and URL components with clear examples.
Check whether JSON is valid and see the exact error location.
Compress JSON by removing whitespace, safely in your browser.
Convert a JSON array of objects into CSV.
Convert CSV data into a JSON array of objects.
Convert JSON into indented XML.
Convert XML into structured JSON.
Convert YAML configuration into JSON.
Convert JSON into readable YAML.
Beautify and indent messy HTML markup.
Beautify and indent minified or messy CSS.
Beautify and indent JavaScript code.
Format and indent SQL queries with uppercase keywords.
Beautify and indent XML documents.
Write Markdown and see a live, sanitized HTML preview.
Convert Markdown into clean, sanitized HTML.
Encode and decode HTML entities like & and <.
Break a URL into protocol, host, path, query and hash.
Parse a URL query string into key–value pairs and JSON.
Test regular expressions with live matches and highlighting.
Build cron expressions from presets or fields with a plain-English preview.
Validate a cron expression and explain it in plain English.
Check whether a string is a valid UUID and its version.
Validate IPv4/IPv6 addresses and see their type.
Find the MIME type for a file extension, or search by type.
Design linear and radial CSS gradients with a live preview and copy the code.
Craft CSS box-shadows with offset, blur, spread, colour and inset — live preview.
Visually set flex-direction, justify, align, wrap and gap and copy the CSS.
Generate a CSS grid with columns, rows and gap and copy the code.
Set each corner radius independently and copy the CSS, with a live preview.
Generate a pure-CSS triangle in any direction, size and colour.
Create a frosted-glass (glassmorphism) effect with blur, tint and transparency.
Break a user-agent string into browser, engine, OS and device.
Build common Git commands from a task and a few inputs.
Generate common Docker commands from a task and inputs.
Shrink HTML by removing comments and unnecessary whitespace.
Compress CSS by stripping comments and whitespace.
Reduce JavaScript size by removing comments and whitespace.
Turn SQL INSERT statements into a JSON array of objects.
Convert HTML into clean Markdown for READMEs and docs.
Convert forum BBCode into HTML.
Turn CSV or tab-separated rows into a Markdown table.