Generate random coupon/discount codes with customizable pattern using X as placeholder for random characters.
HTTP headers (analyzer, generator for JSON/REST/GraphQL, cache header generator, status code checker), CORS & rate limit (CORS header generator, policy tester, rate limit header parser), env/config (.env parser, variable template generator, AMQP exchange config), and dev config (ESLint configs for React/Node/TypeScript/Next.js, HTTP retry policy builder with exponential/linear/circuit-breaker).
Generate cryptographically secure random strings with customizable length, count, and character sets (uppercase, lowercase, digits, symbols).
Generate cryptographically strong random passwords with customizable length, character sets (uppercase, lowercase, digits, symbols), and exclude-similar options.
JSON diff comparison, WiFi QR code config generator, SVG placeholder generator, international phone number parser, OTP code generator, and slugify tool.
Generates cryptographically strong random passwords with fully customizable length, character sets, and pattern rules.
Coupon Code Generator lets you generate random coupon/discount codes with customizable pattern using X as placeholder for random characters.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Generate random coupon/discount codes with customizable pattern using X as placeholder for random characters. It's ideal for developers, designers, and anyone who needs to generate random coupon/discount codes with customizable pattern using x as placeholder for random characters without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. All numeric values are entered through input fields with real-time updates.
Yes. After the initial page load, Coupon Code Generator runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.
Time Converter
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors.
Regex Tester
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
JS Minifier
Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics.
Base64 Encode/Decode
Encodes text or small files into Base64 strings and decodes them back with automatic MIME-type detection for binary safety.