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Formatter
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JSON Formatter & Validator
Format, validate and minify JSON instantly. Syntax errors highlighted with exact line numbers. Free online JSON formatter — no account needed, runs in browser.
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Password Generator
Generate strong, secure passwords instantly. Customize length up to 128 chars, choose character sets, and bulk-generate. 100% browser-based — passwords never leave your device.
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Color Picker — HEX RGB HSL Converter
Pick colors visually and instantly convert between HEX, RGB, and HSL formats. Copy CSS-ready values with one click. Free online color picker and converter for designers.
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QR Code Generator
Generate QR codes for URLs, WiFi, text, email, and phone. Download as PNG up to 512×512px. Free QR code maker — no signup, runs entirely in your browser.
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Base64 Encoder & Decoder
Encode or decode Base64 text and files instantly. Supports images, PDFs, and any binary file. 100% browser-based Base64 encoder — your data never leaves your device.
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Hash Generator — MD5 SHA256 SHA512
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes for text or files instantly. Free online hash calculator — runs in browser, nothing sent to any server.
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UUID / ULID Generator
Generate UUID v1, v4, and v7 instantly. Bulk generate up to 100 UUIDs at once. Free online UUID generator — cryptographically random, runs entirely in your browser.
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Regex Tester
Test and debug regular expressions live with real-time match highlighting. Supports flags, capture groups, and named groups. Free online regex tester — no signup needed.
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Markdown Editor
Write Markdown with live preview side by side. Export to HTML or copy rendered output. Supports GFM tables, code blocks, and task lists. Free online Markdown editor.
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JWT Decoder
Decode and inspect JWT tokens instantly — view header, payload, and signature. Verify signatures with your secret. Free online JWT decoder — nothing sent to any server.
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Meta Tag Generator
Generate complete HTML meta tags — title, description, Open Graph, and Twitter Cards — with live preview. Free SEO meta tag generator for developers and marketers.
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Favicon Generator
Convert any image to a complete favicon set — ICO, PNG (16×16 to 512×512), Apple Touch Icon, and manifest.json. Free online favicon generator — no signup required.
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CSS Gradient Generator
Create beautiful CSS gradients with live preview. Already available in the editor sidebar.
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CSS Box Shadow Builder
Build CSS box shadows visually. Already available in the editor sidebar.
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URL Encoder & Decoder
Encode and decode URL components instantly. Available in the onHTML editor.
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PX → EM / REM Converter
Convert pixel values to em and rem units. Available in the onHTML editor.
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Text Diff Checker
Compare two blocks of text side by side and see differences highlighted. Line-by-line and word-level diff view. Free online text diff tool — no signup, works in browser.
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Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, UPPER_CASE, and more. Instant conversion for variable names and identifiers. Free online case converter.
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Word & Character Counter
Count words, characters, sentences, and paragraphs in real time. Calculate reading time and keyword density. Free online word counter for writers, students, and SEO pros.
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Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text in paragraphs, sentences, or words. Choose length and copy instantly. Free Lorem Ipsum generator for designers and developers.
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Slug / URL Generator
Convert any title or phrase into a clean URL slug. Handles special characters, accents, and spaces. Free online slug generator for SEO-friendly URLs — instant results.
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Cron Expression Generator
Build cron expressions visually with a form-based editor. Set minute, hour, day, month, and weekday fields. Preview next run times. Free online cron expression generator.
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Image Compressor
Compress JPEG, PNG, and WebP images without visible quality loss. Reduce file size up to 90%. Free online image compressor — runs in browser, images never uploaded to any server.
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SVG to PNG Converter
Convert SVG files to PNG images at any resolution. Set custom width and height, preserve transparency. Free online SVG to PNG converter — instant, no signup required.
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Image Resizer
Resize images to exact pixel dimensions or percentages. Supports JPEG, PNG, WebP, and GIF. Free online image resizer — runs in browser, no uploads to any server.
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JSON ↔ YAML ↔ XML ↔ CSV Converter
Convert JSON to YAML and YAML to JSON instantly with syntax validation. Handles nested structures and arrays. Free online JSON ↔ YAML converter — no signup, browser-based.
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Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly. Supports large numbers and shows all bases simultaneously. Free online number base converter.
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AI Token Counter
Count tokens for GPT-3.5, GPT-4, and Claude models using the exact tokenizer. Estimate API costs before sending requests. Free online LLM token counter — no signup needed.
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CSS Glassmorphism Generator
Generate CSS glassmorphism effects visually. Adjust blur, transparency, border, and background. Copy ready-to-use CSS. Free glassmorphism generator for modern UI design.
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CSS Loader Generator
Generate CSS loading spinner animations with live preview. Choose from dots, rings, bars, and more. Copy pure CSS — no JavaScript needed. Free CSS loader generator.
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CSS Border Radius Generator
Build CSS border-radius shapes visually with independent corner controls. Preview any shape live and copy the CSS. Free online border-radius generator for web designers.
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CSS Cubic-Bezier Visualizer
Create CSS cubic-bezier easing curves with a visual editor. Drag control points and preview animation in real time. Copy the CSS transition value. Free cubic-bezier generator.
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Tailwind ↔ CSS Converter
Convert plain CSS to Tailwind CSS utility classes instantly. Automatically maps colors, spacing, typography, and more. Free online CSS to Tailwind converter for developers.
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HTML ↔ JSX Converter
Convert HTML snippets to valid JSX for React components. Handles className, camelCase props, and self-closing tags. Free online HTML to JSX converter — no signup.
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cURL to Code Converter
Convert cURL commands to Python, JavaScript, PHP, Go, and more. Paste a curl command and get clean code instantly. Free online cURL converter for developers.
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Mock JSON Generator
Generate realistic mock JSON data for testing APIs and UIs. Define a schema with types, arrays, and nested objects. Free online mock data generator — no signup needed.
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Open Graph Preview
Preview how your web page looks when shared on Facebook, Twitter, LinkedIn, and WhatsApp. Check Open Graph and Twitter Card tags. Free online OG preview tool.
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Schema.org JSON-LD Generator
Generate JSON-LD structured data markup for Google — Article, Product, FAQ, BreadcrumbList, and more. Validate and copy ready-to-paste schema. Free online schema generator.
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Sitemap.xml Generator
Generate an XML sitemap from a list of URLs. Add priority, change frequency, and last-modified date. Download the sitemap.xml file. Free online sitemap generator.
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robots.txt Generator
Build a robots.txt file visually. Configure allow/disallow rules per user-agent, set crawl delay, and add sitemap URL. Free online robots.txt generator for SEO.
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CSV ↔ JSON Converter
Convert CSV to JSON and JSON to CSV instantly. Supports headers, custom delimiters, and nested JSON flattening. Free online CSV ↔ JSON converter — no signup needed.
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HTTP Headers Inspector
Inspect HTTP response headers for any URL. Check status code, cache-control, security headers, and content type. Free online HTTP header checker tool — no signup.
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Pomodoro Focus Timer
Stay focused with a Pomodoro timer — customizable work and break intervals, session tracking, and browser notifications. Free online Pomodoro timer — no account needed.
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CSS Gradient Generator
Create CSS gradient backgrounds visually — linear, radial, and conic. Add multiple color stops, set angle and position. Copy CSS instantly. Free online gradient generator.
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Image to Base64 Encoder
Convert images to Base64 data URIs for embedding in HTML, CSS, or JSON. Supports JPEG, PNG, GIF, SVG, and WebP. Free online image to Base64 converter — runs in browser.
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CSS Box Shadow Generator
Design CSS box shadows visually with live preview. Control offset, blur, spread, color, and inset. Layer multiple shadows. Copy CSS one click. Free box-shadow generator.
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Color Palette Generator
Generate harmonious color palettes — complementary, triadic, analogous, and more. Export as CSS variables, HEX list, or JSON. Free online color palette generator for designers.
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Text & Code Diff Checker
Compare two files or code snippets and view differences highlighted line by line. Supports unified and split-view modes. Free online diff checker — no signup, works in browser.
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Markdown to HTML Converter
Convert Markdown files and text to clean HTML with syntax highlighting for code blocks. Download the HTML file. Free online Markdown to HTML converter — no signup needed.
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JSON Diff Viewer
Compare two JSON documents and see added, removed, and changed keys highlighted. Supports deep nested structures. Free online JSON diff tool — runs in browser, no uploads.
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Crontab Visual Calendar
Visualize and explain cron expressions in plain English. See the next 10 scheduled run times. Paste any cron string to instantly understand it. Free online cron expression visualizer.
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HTML Entity Encoder / Decoder
Encode text to HTML entities and decode HTML entities back to readable text. Supports named, decimal, and hex entities. Free online HTML entity encoder and decoder.
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Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Supports seconds/ms, timezones, bulk conversion, and a live "Now" clock.
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SQL Formatter & Beautifier
Format and beautify SQL queries online. Supports MySQL, PostgreSQL, SQL Server, SQLite. Keyword casing, indent size, and minify mode.
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JSON Viewer & Tree Explorer
Explore and navigate JSON data with an interactive tree view. Expand/collapse nodes, search keys and values, copy paths, and validate structure instantly. Free JSON tree viewer.
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Color Contrast Checker — WCAG AA/AAA
Check foreground/background color contrast ratios against WCAG AA and AAA accessibility standards. Instant pass/fail results for normal and large text. Free color contrast checker.
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Date Calculator — Add Days, Date Diff & Age
Add or subtract days from any date, calculate the difference between two dates, and compute age from a birthdate. Three calculators in one free online date tool.
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Code Beautifier — HTML, CSS & JS Formatter
Beautify and format HTML, CSS, and JavaScript code with configurable indentation. Paste messy code and get clean, readable output instantly. Free online code formatter.
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Code Screenshot — Beautiful Code Images
Turn your code into beautiful screenshots with syntax highlighting, custom themes, gradient backgrounds, and window chrome. Export as PNG. Free code image generator.
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Mesh Gradient Generator
Create stunning mesh gradient backgrounds with draggable color points, 12 presets, and one-click export to PNG, CSS, and SVG. Free mesh gradient generator.