Multi-functional developer toolkit includes QR and barcode creation, unit & currency conversion, regular expression testing, code formatting and minification, Cron & UUID generation, text processing and color format conversion.
Convert between camelCase, snake_case, kebab-case and more naming styles
Free online color blind simulator. Preview how colors and images appear under color blindness, color weakness, and red-green color blindness perspectives. Perfect for accessible design, UI color checking, and visual accessibility optimization.
Online color converter supporting 14 color formats including HEX, RGB, RGBA, HSL, HSV, CMYK, OKLCH, LAB, LCH with instant conversion. Features WCAG contrast checking, color harmony schemes, shade generation, image color picker, and batch processing. All processing happens locally in your browser with no upload required, ready to use instantly on desktop and mobile. Professional tool for designers and frontend developers.
Free online .htaccess to Nginx converter. Convert Apache RewriteRule, redirects, and URL rewriting rules to Nginx Rewrite configuration. Perfect for website migration, server switching, and operations troubleshooting.
Free online SQL converter. Support conversion between different SQL dialects including MySQL, PostgreSQL, SQL Server, Oracle and more. Perfect for database migration and cross-database development.
Free online Cookie Parser. Parse Set-Cookie headers and Cookie strings, view cookie attributes, support JSON export and Netscape format. Perfect for web development debugging.
Free online Cron expression generator. Visually generate Cron, crontab, and scheduled task expressions with execution time preview. Perfect for Linux operations, backend development, and automation scheduling configuration.
Free online Cron expression validator. Check Cron and crontab syntax correctness and preview future execution times. Perfect for scheduled task debugging, rule verification, and pre-launch checks.
Free online CSS formatter. Support CSS code beautification, indentation organization, code layout, and CSS Formatter scenarios. Perfect for development debugging, code review, and collaborative organization.
Free online CSS minifier. Support CSS code compression, removing extra spaces and line breaks. Perfect for page publishing, static resource optimization, and production environment size control.
CSV to Excel tool page is reserved. Will later support converting CSV files to Excel or XLSX spreadsheets with export download. Current features are under development. You can bookmark this page and wait for the feature launch.
Free online CSV Viewer. Quickly view CSV data in table format, support column sorting and data filtering. Perfect for data preview and data analysis.
Free online CSV editor. Support CSV data viewing, editing, filtering and sorting. Perfect for data processing, data analysis and data conversion preparation.
Free online currency converter with real-time exchange rates. Convert USD, EUR, GBP, and more instantly. Perfect for travel, cross-border shopping, and international payments.
Free online text comparison tool. Support comparing differences between two texts, code, and configuration content. Perfect for copy proofreading, code review, version comparison, and configuration troubleshooting.
Free online Excel to CSV converter. Quickly convert Excel files (XLSX, XLS) to CSV format. Perfect for data migration, data import and data processing.
Online Favicon Generator supporting text, image, and Emoji modes to create website icons. One-click export of complete ZIP package including favicon.ico, 16/32/180/192/512 multi-size PNGs, and site.webmanifest. Auto-generates HTML head link code, with square/rounded/circle shape options and transparent background support. Pure Canvas local generation.
Free online CSS formatter. Beautify CSS code, organize indentation and structure. Perfect for development debugging, code review and team collaboration.
Free online HTML formatter. Beautify HTML code, organize tag indentation and structure. Perfect for development debugging, code review and template editing.
Free online JavaScript formatter. Beautify JS code, organize indentation and structure. Perfect for development debugging, code review and code obfuscation reversal.
Free online Markdown formatter. Beautify Markdown document format, organize headings, lists and code blocks. Perfect for document writing, README editing and note organization.
Free online XML formatter. Support XML beautification, compression, indentation organization, and syntax validation. Perfect for interface message viewing, configuration file organization, and development debugging.
Free online Hexadecimal Converter. Instantly convert between Hex, Decimal, Binary, Octal and 2–36 base number systems. Supports fractional numbers, high-precision calculation, no registration required.
Free online HTML formatter. Support HTML code beautification, indentation organization, code layout, and HTML Formatter scenarios. Perfect for development debugging, code review, and collaborative organization.
Free online HTML minifier. Support HTML code compression, removing extra spaces and line breaks. Perfect for page publishing, static resource optimization, and production environment size control.
Free online HTML to Markdown converter. Convert webpage source code, rich text, and article snippets to Markdown syntax. Perfect for blog migration, document organization, and knowledge base editing.
Free online JS formatter. Support JavaScript code beautification, indentation organization, code layout, and JS Formatter scenarios. Perfect for development debugging, code review, and collaborative organization.
Free online JS minifier. Support JavaScript code compression, removing extra spaces and line breaks. Perfect for page publishing, static resource optimization, and production environment size control.
Free online JSX formatter. Support React JSX code beautification, indentation organization, code layout, and JSX Formatter scenarios. Perfect for development debugging, code review, and collaborative organization.
Free online JSX minifier. Support React JSX code compression, removing extra spaces and line breaks. Perfect for page publishing, static resource optimization, and production environment size control.
Free online keyword clustering tool. Group and classify keyword lists by topic quickly. Perfect for SEO keyword library organization, long-tail keyword grouping, content planning, topic page layout, and category building.
Free online Lorem Ipsum generator. Generate placeholder text, dummy paragraphs, sentences, and words. Perfect for web design, typography demos, prototyping, and template placeholders.
Free online Markdown table generator. Support quick conversion of CSV or text to Markdown Table. Perfect for GitHub README, technical documentation, tutorial articles, and knowledge base formatting.
Free online Markdown to HTML converter. Convert Markdown text to HTML webpage code with real-time preview. Perfect for blog publishing, documentation launch, email templates, and content migration.
Free online Meta tag generator. Support generating title, meta description, keywords, canonical, Open Graph, and Twitter Card tags. Perfect for website SEO settings, page header optimization, and social sharing card configuration.
Free secure password generator using browser Web Crypto CSPRNG. Generate strong random passwords, memorable passphrases, and numeric PINs. Strength meter, batch export, local-only generation.
Free online password strength checking tool. Support checking password security level, weak password risks, and estimated cracking time. Perfect for pre-registration self-check, account security assessment, and pre-password-change testing.
Free online 2-in-1 QR Code generator and Barcode generator, supporting 9 QR Code types (URL/WiFi/vCard/SMS/Phone/Email/Geolocation/Calendar Event/Text) and 6 barcode formats (CODE128/EAN-13/UPC etc.), customizable colors, styles and Logo, batch generation with ZIP download, pure frontend generation with no data upload.
Free online Regex Tester with JavaScript real-time matching, Capture Group/Named Group inspection, replace preview, built-in regex syntax explanation. Web Worker sandbox execution prevents ReDoS. Includes common regex template library (email/phone/URL/IP/UUID etc.), ready to use without registration.
Free online Slugify tool. Support quick conversion of English titles, article titles, and word phrases to URL Slugs, permalinks, and SEO-friendly aliases. Perfect for blog publishing, independent site building, and route naming.
Free online SQL builder. Visually generate CREATE TABLE, SELECT, INSERT, UPDATE, DELETE, and other common SQL statements. Perfect for database learning, backend development, table structure design, and query statement assembly.
Free online SQL formatter. Support SQL beautification, compression, keyword layout, indentation organization, and query statement formatting. Perfect for database development, join debugging, and code review.
Free online word counter tool that counts words, characters (with/without spaces), sentences, lines, and estimates reading time in real-time. All processing happens locally in your browser - no text uploaded to servers. Perfect for writing, essays, WeChat articles, SEO content, and more.
Free online Text Translator. Support multi-language text translation, suitable for document translation, website localization and cross-language communication.
All-in-one online time tool: global world clock with flags + SVG analog clocks + day/night indicators, bidirectional Unix timestamp conversion (seconds/milliseconds), countdown timer with quick presets. Shows your local current time and timestamp on load, runs entirely in-browser with no internet required.
Free online TS formatter. Support TypeScript code beautification, indentation organization, code layout, and TS Formatter scenarios. Perfect for development debugging, code review, and collaborative organization.
Free online TS minifier. Support TypeScript code compression, removing extra spaces and line breaks. Perfect for page publishing, static resource optimization, and production environment size control.
Free online TSX formatter. Support React TypeScript code beautification, indentation organization, and component layout. Perfect for TSX component development, type debugging, and team collaboration.
Free online TSX minifier. Support React TypeScript code compression, removing extra spaces and line breaks. Perfect for component snippet optimization and pre-publishing preparation.
Free online unit converter supporting 34 categories including length, weight, temperature, area, volume, speed, time, pressure, energy, power, data storage, and more. Covers metric, imperial, and Chinese traditional units with popular conversion tables and formulas. Enter a value for instant results.
Free online Unix timestamp converter supporting bidirectional conversion between seconds, milliseconds, and microseconds with automatic unit detection. Switch between UTC and local timezone, view live current timestamp, and get code examples for JavaScript, Python, Go, and Bash. Perfect for development debugging, log analysis, and API integration.
Free online UUID generator supporting UUID v1/v4/v5, ULID, and NanoID in one tool. Bulk generate up to 100 IDs, toggle case/hyphen formatting, validate UUID version recognition. Ideal for database primary keys, distributed IDs, API request identifiers, and test data generation. Copy all or export to TXT/JSON. All generation runs locally in your browser—no data uploaded.
Free online YAML formatter. Support YAML beautification, syntax checking, indentation organization, and configuration layout. Perfect for Kubernetes, Docker Compose, and various YAML configuration file processing.
