Generate serial numbers with configurable format patterns using X (hex), 9 (digit), and A (alphanumeric) placeholders.
Network tools (port number lookup with 25+ services, user-agent parser, query string parser), formatters (SSE event formatter, rate limit header parser, pricing tier builder), crypto/security (TOTP generator with SHA-1, SSH key generator RSA/ECDSA/Ed25519), and time tools (timestamp to date, time zone converter with 14 zones, world clock).
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 secure API keys with configurable length, character set, and optional prefix. Use with any authentication scheme.
Expression evaluator with keypad and history, ETA calculator with distance and speed, and a stopwatch/chronometer with lap recording.
Emoji picker with 400+ emoji grouped by category with search, and ASCII art generator with block, bubble, fancy, and digital styles.
Serial Number Generator lets you generate serial numbers with configurable format patterns using X (hex), 9 (digit), and A (alphanumeric) placeholders.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Generate serial numbers with configurable format patterns using X (hex), 9 (digit), and A (alphanumeric) placeholders. It's ideal for developers, designers, and anyone who needs to generate serial numbers with configurable format patterns using x (hex), 9 (digit), and a (alphanumeric) placeholders without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. Paste or type your content directly into the provided editor area.
Yes. After the initial page load, Serial Number 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.