Generate HMAC signatures using a secret key and hash algorithm for API authentication.
Hash API keys using SHA-256 for secure storage. Never store raw API keys — hash them before persisting to your database.
Generate RSA key pairs (2048/4096-bit) using the Web Crypto API. Export public and private keys as PEM strings. All client-side, no server uploads.
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).
Applies five distinct text transformations: reverse entire string order, reverse each word individually, flip upside down using rot180 Unicode, mirror horizontally, and rotate 180 degrees. Perfect for creating puzzles, secret messages, palindromes, and attention-grabbing social media content.
Reduces JPG, PNG, and WebP file sizes using smart compression with a side-by-side quality preview slider. Balance file size and visual quality visually — max 20MB per image. Perfect for web optimization, email attachments, and social media uploads.
HMAC Generator lets you generate HMAC signatures using a secret key and hash algorithm for API authentication.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Generate HMAC signatures using a secret key and hash algorithm for API authentication. It's ideal for developers, designers, and anyone who needs to generate hmac signatures using a secret key and hash algorithm for api authentication 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, HMAC 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.