Dev Tools

Dev Tools List

• JSON Formatter - Beautify or minify JSON strings instantly and check for validity errors.
• UUID Generator - Generate up to 20 cryptographically secure UUID v4 values at once.
• Password Generator - Generate secure random passwords in the browser by choosing length, character set, and count.
• JWT Decoder - Decode a JWT header and payload to view the JSON and key claims.
• Regex Tester - Enter a regex pattern to see matches in text in real time.
• QR Code Generator - Convert text or a URL into a QR code and download it as an image.
• Wi-Fi QR Code - Make a QR code from Wi-Fi network info so guests can connect easily.
• UTM Parameter Builder - Add UTM parameters to a URL to build a marketing campaign tracking link.
• CSS vw Unit Converter - Convert px to viewport-width vw units, or the reverse.
• CSS clamp() Generator - Auto-generate a CSS clamp() function from min/max values and a viewport range.
• Color Palette Picker - Pick a color and view its HEX, RGB, HSL values plus complementary and analogous colors.
• SQL Formatter - Neatly align SQL queries by keywords and clauses.
• HTML Formatter - Tidy HTML markup with consistent indentation and line breaks.
• CSS Formatter - Neatly align CSS code by rules and properties.
• JavaScript Formatter - Tidy JavaScript code for readability using Prettier rules.
• JS/CSS Minifier - Minify JavaScript and CSS code by removing whitespace and applying minify rules.
• XML Formatter - Parse an XML document and indent it by hierarchy.
• YAML Formatter - Tidy a YAML document with consistent indentation and line breaks.
• Code Diff Tool - Compare two code or text inputs line by line to show additions and deletions.
• Cron Expression Generator - Generate a cron expression by combining minute, hour, day, month, and weekday values.
• Cron Next Run Calculator - Calculate the next run times of a cron expression based on the current time.
• HTTP Status Code Lookup - Quickly look up the name and meaning of an HTTP status code.
• MIME Type Lookup - Quickly find file extensions and MIME types.
• Keyboard Event Inspector - Instantly check the key, code, and modifier values of a key press event.
• User-Agent Analyzer - Extract browser, OS, and device info from a User-Agent string.
• Regex Replace Tester - Apply a regex pattern and replacement value to see the result.
• JSONPath Tester - Extract values from JSON data using a JSONPath expression.
• CSS box-shadow Generator - Adjust shadow values with sliders and generate box-shadow CSS.
• CSS border-radius Generator - Check rounded-corner values with a preview and generate border-radius CSS.
• CSS gradient Generator - Adjust colors and angle to generate linear-gradient CSS.
• CSS easing Generator - Adjust cubic-bezier values to generate a CSS easing function.
• Flexbox Generator - Adjust flex-direction, justify-content, align-items, and gap to generate Flexbox CSS.
• Grid Generator - Adjust columns, gap, and item count to generate CSS Grid layout code.
• z-index Organizer - Enter names and z-index values per line and sort from lowest to highest.
• cURL → fetch Converter - Convert a cURL command into JavaScript fetch code.
• fetch → axios Converter - Convert fetch code into the axios request format.
• HTTP Header Parser - Parse a header string into key-value form.
• .env Sorter - Sort keys in a .env file and find duplicate keys.
• package.json Viewer - Neatly organize scripts, dependencies, and devDependencies.
• semver Comparator - Compare two semantic versions and interpret version range notation.
• Gitignore Generator - Generate gitignore templates by language/framework.
• Dockerfile Formatter - Tidy Dockerfile commands and present the structure clearly.
• Docker Compose Formatter - Neatly tidy docker-compose YAML.
• URL Parser - Break a URL into protocol, host, path, and query.
• User-Agent Generator - Generate User-Agent strings for testing.
• API Latency Summary - Calculate the mean, p95, and p99 of a list of response times.
• GraphQL Formatter - Tidy GraphQL queries and mutations.
• GraphQL Variable Merger - Merge a GraphQL query and variables JSON into an API request body.
• SQL IN Clause Generator - Convert a line list into a SQL IN (…) form.
• JSON Mock Data Generator - Generate a sample JSON array based on field definitions.
• CSS text-shadow Generator - Adjust X/Y offset, blur, color, and opacity to make CSS text-shadow code.
• CSS filter Generator - Generate CSS filter values like blur, brightness, contrast, and grayscale with a preview.
• Color Shades Palette Generator - Generate a 50–950 Tailwind-style shade palette from one base HEX color.
• Meta / OG Tag Generator - Generate title, description, canonical, OG, and Twitter Card meta tag HTML.
• JSON → Table Converter - Convert a JSON object array into a rows-and-columns table and export to CSV.
• JSON Tree Viewer - Show JSON data as a collapsible/expandable tree structure.
• CSS Specificity Calculator - Calculate and compare the specificity score of CSS selectors.
• Git Branch Name Generator - Convert a task title into a name following Git branch naming conventions.
• Hash Generator - Hash text with MD5, SHA-1, SHA-256, and SHA-512. Supports HEX and Base64 output.
• JSON Schema Validator - Validate JSON data against a JSON Schema (Draft-7) and show error locations as JSON Pointers.
• Browser Info - See the browser, OS, device, screen and locale details your browser reports — all locally.
• RSA Calculator - Derive an RSA key (n, φ, d) from two primes and a public exponent, and walk through encryption/decryption. For learning only.
• API Key Generator - Generate cryptographically secure random API keys in Base62, Hex, Base64URL or UUID formats, entirely in your browser.
• XML Validator - Check whether XML is well-formed, view error messages, and get a tidy indented version.
• YAML Validator - Validate YAML syntax, show error line/column positions, and preview the parsed JSON.