All Tools
Free online tools for developers, writers, and everyone. JSON formatter, Base64 encoder, word counter, unit converter and more.
Developer Tools
84 tools
JSON Formatter
Format, validate, and beautify your JSON data online for free.
DevQR Code Generator
Generate QR codes for URLs, text, Wi-Fi passwords, and more. Customize colors, size, and error correction level.
DevBase64 Encoder/Decoder
Encode text to Base64 or decode Base64 to text instantly.
DevColor Picker & Converter
Pick colors and convert between HEX, RGB, HSL, and RGBA formats instantly.
DevUUID Generator
Generate random UUIDs (v4) instantly. Bulk generate up to 100 UUIDs at once.
DevRegex Tester
Test and debug regular expressions with real-time matching and highlighting.
DevURL Encoder/Decoder
Encode or decode URLs and query parameters online.
DevHash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text online.
DevUnix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
DevJWT Decoder
Decode and inspect JSON Web Tokens (JWT). View header, payload, claims and expiration status.
DevSQL Formatter
Format, beautify, and minify SQL queries online. Supports MySQL, PostgreSQL, SQLite, and standard SQL.
DevJSON to CSV Converter
Convert JSON data to CSV format and CSV to JSON instantly. Free online converter for developers.
DevCSV to JSON Converter
Convert CSV data to JSON format instantly. Supports custom delimiters, header options, and file upload. Free online converter.
DevCSS Gradient Generator
Create beautiful CSS gradients with a visual editor. Copy the CSS code instantly.
DevIP Address Lookup
Find geolocation, ISP, and other details for any IP address.
DevCron Expression Generator
Parse, validate, and generate cron expressions with a visual editor. See next scheduled run times.
DevSEO Meta Tag Generator
Generate complete HTML meta tags for SEO, Open Graph, and Twitter Cards. Real-time SEO score and preview.
DevCSS to Tailwind Converter
Convert vanilla CSS properties to Tailwind CSS utility classes. Supports layout, spacing, typography, and more.
DevJSON to YAML Converter
Convert between JSON and YAML formats instantly. Bidirectional conversion for DevOps and configuration files.
DevHTML Entity Encoder/Decoder
Encode special characters to HTML entities or decode HTML entities back to text. Essential for web developers.
DevFavicon Generator
Create favicons from images or text/emoji. Generate all required sizes for web, iOS, and Android.
DevColor Contrast Checker
Check WCAG color contrast ratios for accessibility. Verify AA and AAA compliance for text and background colors.
DevColor Palette Generator
Generate beautiful color palettes using color theory. Create complementary, analogous, triadic, and more harmony types.
DevOG Image Generator
Create Open Graph images for social media sharing. Generate beautiful preview cards for your website links.
DevJavaScript Minifier
Minify and beautify JavaScript code online. Remove comments, whitespace, and reduce JS file size instantly.
DevCSS Minifier
Minify and beautify CSS code online. Remove comments, whitespace, and reduce file size instantly.
DevHTML Minifier
Minify and beautify HTML code online. Remove comments, extra whitespace, and reduce file size.
DevHTTP Status Codes
Look up HTTP status codes with descriptions, use cases, and examples. The complete reference for 1xx, 2xx, 3xx, 4xx, and 5xx codes.
DevCSS Box Shadow Generator
Generate beautiful CSS box shadows visually with live preview. Customize offset, blur, spread, color, and multiple layers.
DevXML Formatter
Format, validate, and minify XML documents online. Pretty-print XML with customizable indentation.
DevText to Binary Converter
Convert text to binary code and binary to text online. Supports binary, octal, decimal, and hexadecimal encoding.
DevNumber Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases.
Devchmod Calculator
Calculate Linux file permissions in octal and symbolic notation. Visual chmod command generator.
DevJSON Schema Generator
Generate JSON Schema from any JSON data. Auto-detect types, formats, and nested structures instantly.
DevImage to Base64 Converter
Convert images to Base64 data URIs for embedding in HTML and CSS. Drag and drop or paste Base64 to decode.
DevHTML to Markdown Converter
Convert HTML code to clean Markdown instantly. Supports headings, lists, links, images, code blocks, and more.
DevHTML to JSX Converter
Convert HTML to React JSX instantly. Transforms class to className, inline styles to objects, and self-closes void elements.
DevcURL Command Builder
Build cURL commands visually. Set HTTP method, URL, headers, request body, and options, then copy the generated command.
DevMarkdown Table Generator
Create Markdown tables visually and copy the formatted output instantly
DevURL Parser
Parse any URL into its components β protocol, hostname, port, path, query parameters, and fragment.
DevCSS Flexbox Generator
Visually design CSS flexbox layouts and copy the generated CSS code.
DevCSS Grid Generator
Visually design CSS grid layouts and instantly copy the generated CSS code.
DevJSON Diff Checker
Compare two JSON objects side by side and instantly see what's added, removed, or changed.
DevCSS Clip Path Generator
Visually create CSS clip-path shapes with draggable handles. Generate clip-path code for polygons, circles, and ellipses.
DevHTML Table Generator
Generate clean HTML table code with customizable rows, columns, and styling options.
DevCSS Animation Generator
Generate CSS @keyframes animations with live preview and customizable timing, duration, and easing.
DevColor Converter
Convert colors between HEX, RGB, HSL, and HSV formats instantly with a live preview.
DevMarkdown to HTML Converter
Convert Markdown to clean, semantic HTML instantly. Supports headings, bold, italic, lists, links, images, code blocks, and more.
DevBcrypt Hash Generator
Generate secure bcrypt-format password hashes and verify them β all in your browser using PBKDF2-SHA256.
DevJSON to TypeScript Interface Generator
Convert JSON objects to TypeScript interfaces or type aliases instantly. Handles nested objects, arrays, nulls, and mixed types β all in your browser.
DevRobots.txt Generator
Create a robots.txt file for your website with a visual editor. Control which search engine bots can crawl your pages.
Dev.gitignore Generator
Generate .gitignore files for any tech stack. Select your languages and frameworks to get a ready-to-use .gitignore.
DevXML to JSON Converter
Convert XML documents to JSON format instantly. Handles attributes, nested elements, and arrays.
DevCSS Units Converter
Convert between CSS units: px, rem, em, vh, vw, %, pt, cm, mm. Adjust base font size and viewport for accurate results.
DevKeycode Viewer
Press any key to see its JavaScript keyboard event properties: key, code, keyCode, which, location, and modifier states.
DevSVG Optimizer
Optimize and minify SVG files by removing metadata, comments, and editor-specific attributes. Reduce file size without losing visual quality.
DevNumber Formatter
Format numbers with locale-specific styles, currency, grouping separators, and decimal places using the Intl.NumberFormat API.
DevEmail Validator
Validate email addresses instantly. Check format, detect typos in common domains, and get detailed breakdown of local part, domain, and TLD.
DevHTML to Text Converter
Strip HTML tags and convert HTML to clean plain text. Preserve line breaks, decode entities, and extract readable content from any HTML.
DevColor Shades Generator
Generate a complete palette of tints and shades from any base color. Get 11 Tailwind-inspired color levels in HEX, HSL, or RGB format.
DevCSS Specificity Calculator
Calculate and compare CSS selector specificity. Instantly see the (A,B,C) breakdown, visualize with bar charts, and understand which selector wins when styles conflict.
DevCSS Border Radius Generator
Visually generate CSS border-radius values with a live preview. Control each corner independently or uniformly, choose px or % units, and copy the CSS with one click.
DevCSP Generator
Generate Content Security Policy (CSP) headers for your website. Configure directives with preset security levels, add custom sources, and copy the complete header value.
Dev.htaccess Generator
Generate Apache .htaccess configuration files with common rules for redirects, caching, security, and performance. Select the rules you need and copy the ready-to-use config.
DevCSS Filter Generator
Create CSS filter effects with a live preview. Adjust blur, brightness, contrast, grayscale, hue rotation, saturation, sepia, and more β then copy the ready-to-use CSS.
DevYAML Validator
Validate and format YAML syntax online. Instantly detect errors and pretty-print valid YAML with proper indentation.
DevSubnet Calculator
Calculate subnet information from an IP address and CIDR notation. Get network address, broadcast, host range, subnet mask, and more.
DevMock Data Generator
Generate realistic fake datasets with names, emails, addresses, and more. Export as JSON, CSV, or SQL instantly.
DevJSON to XML Converter
Convert JSON to XML and XML to JSON instantly in your browser. Perfect for API integration, config file conversion, and data transformation.
DevYAML to JSON Converter
Convert YAML to JSON or JSON to YAML instantly in your browser. Supports nested objects, arrays, and all YAML data types.
DevCSV to XML Converter
Convert CSV data to XML format instantly. Customize the root and row tag names to match your schema. Handles quoted fields, commas in values, and special characters.
DevGit Command Generator
A comprehensive git command reference and generator. Filter by category, search by what you want to do, fill in parameters, and copy the ready-to-run command.
DevPixel β REM/EM Converter
Convert CSS pixel values to rem and em units, and vice versa. Includes a reference conversion table.
DevText Encrypt / Decrypt
Encrypt and decrypt text using AES-256-GCM directly in your browser. No data is ever sent to a server.
DevJSON to SQL
Convert JSON data to SQL INSERT statements instantly. Supports MySQL, PostgreSQL, SQLite, and SQL Server with optional CREATE TABLE generation.
DevJWT Encoder
Create signed JSON Web Tokens (JWT) with custom payload claims. Signs with HS256 (HMAC-SHA256) entirely in your browser.
DevHTML Formatter
Prettify and format HTML with proper indentation. Supports 2-space, 4-space, or tab indentation and attribute wrapping.
DevJSONPath Tester
Evaluate JSONPath expressions against JSON data in real time. Supports filters, slices, wildcards, and recursive descent.
DevCSS Triangle Generator
Generate pure-CSS triangles using the border trick. Pick a direction, size, and color β copy the CSS instantly.
DevUTM Builder
Build trackable campaign URLs with utm_source, utm_medium, utm_campaign and more β fully client-side.
DevCSS Cubic Bezier Generator
Visually craft CSS cubic-bezier easing curves with a draggable control-point editor and live animation preview.
DevCSS Glassmorphism Generator
Build frosted-glass UI panels with live preview against four backgrounds. Outputs cross-browser CSS with the saturate() trick that makes glass look premium.
DevCSS Loader Generator
Build animated CSS loaders and spinners with no JavaScript. Six styles, custom color, size, and speed β copy the HTML + CSS straight into your project.
DevCSS Text Stroke Generator
Create outlined text effects with -webkit-text-stroke. Live preview with transparent, solid, or gradient fills, plus optional drop shadow. Copy the CSS in one click.
DevText Tools
19 tools
Word Counter
Count words, characters, sentences, and paragraphs in your text.
TextCase Converter
Convert text between UPPERCASE, lowercase, Title Case, and more.
TextMarkdown Preview
Write Markdown and preview the rendered HTML output in real-time.
TextCharacter Counter
Count characters, words, sentences, and check platform limits instantly.
TextText Diff / Compare
Compare two texts side by side and see the differences highlighted. Free online diff checker.
TextEmoji Picker & Copy
Browse, search, and copy emojis instantly for any platform.
TextLorem Ipsum Generator
Generate placeholder Lorem Ipsum text for your designs and mockups.
TextAI Prompt Generator
Generate professional AI prompts with templates for coding, writing, data analysis, and marketing.
TextConvert any text into URL-friendly slugs instantly. Perfect for blog posts, page URLs, and file names.
TextString Utilities
All-in-one string manipulation tool. Reverse, slugify, trim, sort lines, count characters and more.
TextText to Speech
Convert text to speech using your browser's built-in voices.
TextMorse Code Translator
Convert text to Morse code and Morse code to text instantly. Play audio beeps and see visual signals.
TextLine Sorter
Sort, deduplicate, reverse, and shuffle lines of text online. Clean up lists, remove duplicates, and organize text instantly.
TextWord Frequency Counter
Analyze word frequency in any text. Count how often each word appears with visual frequency bars.
TextMarkdown TOC Generator
Automatically generate a table of contents from your Markdown headings. Supports GitHub, GitLab link styles, custom heading depth range, and one-click insertion.
TextReadability Analyzer
Analyze text readability with Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and ARI scores. Find out what grade level your writing targets.
TextText Repeater
Repeat any text or phrase up to 1000 times with a custom separator. Perfect for generating test data, placeholder content, or repeated patterns.
TextTyping Speed Test
Measure your typing speed in WPM (words per minute) and accuracy. Practice touch typing with real-time character feedback.
TextASCII Art Generator
Convert text into ASCII art with multiple font styles and density settings.
TextCalculators & Converters
22 tools
Password Generator
Generate strong, secure random passwords with customizable length and character types.
CalcPassword Strength Checker
Check password strength instantly with entropy analysis, crack time estimate, and detailed criteria breakdown.
CalcUnit Converter
Convert between different units of length, weight, temperature, and more.
CalcPercentage Calculator
Calculate percentages easily: what percent is X of Y, X% of Y, and percentage change.
CalcTimezone Converter
Convert time between any two time zones. See world clocks for major cities instantly.
CalcInvoice Generator
Create professional invoices in seconds. Free, no signup required.
CalcDate Formatter & Calculator
Convert dates between ISO 8601, Unix timestamps, and other formats. Calculate date differences easily.
CalcAspect Ratio Calculator
Calculate and convert aspect ratios for images, videos, and screens. Lock width or height to scale proportionally.
CalcPomodoro Timer
A customizable Pomodoro productivity timer with work sessions, short breaks, long breaks, and session tracking.
CalcRandom Number Generator
Generate cryptographically secure random numbers. Supports custom ranges, dice rolls, and coin flips.
CalcByte / Data Size Converter
Convert between bytes, KB, MB, GB, TB, and PB instantly. Supports both decimal (SI) and binary (IEC) systems.
CalcConvert between Arabic numbers and Roman numerals instantly. Supports numbers 1 to 3999.
CalcCountdown Timer
A simple, customizable countdown timer. Set hours, minutes, and seconds, then start counting down with an audio alert when time is up.
CalcNumber to Words
Convert any number into English words. Supports cardinal numbers, ordinal numbers, and currency amounts in multiple currencies.
CalcAge Calculator
Calculate your exact age in years, months, and days from your date of birth. Find total days lived and days until your next birthday.
CalcStatistics Calculator
Calculate mean, median, mode, standard deviation, variance, quartiles, and more from any list of numbers. Supports comma, space, or newline-separated input.
CalcBMI Calculator
Calculate your Body Mass Index (BMI) with metric or imperial units. Instantly see your BMI category and ideal weight range for your height.
CalcLoan Calculator
Calculate monthly loan payments, total interest, and see a full amortization breakdown for any mortgage, car loan, or personal loan.
CalcTip Calculator
Calculate the tip and split the bill instantly. Choose a preset tip percentage or enter a custom amount, and see exactly how much each person owes.
CalcDate Difference Calculator
Calculate the exact difference between two dates in years, months, weeks, days, hours, minutes, and seconds.
CalcStopwatch
A precise stopwatch with lap tracking. Start, stop, and record laps β see best and worst lap times highlighted automatically.
CalcPace Calculator
Solve for running pace, finish time, or distance from any two known values. Works in km or miles with km/h and mph speed conversions and split times for 5K/10K/half/marathon.
CalcImage & Media
8 tools
Image Compressor
Compress images online for free. Reduce file size while maintaining quality. Supports JPEG, PNG, and WebP formats.
MediaImage Resizer
Resize images online for free. Set exact dimensions, choose output format, and download instantly. No upload to server.
MediaPDF Merger
Merge multiple PDF files into one document online for free. Drag and drop to reorder pages. No upload to server.
MediaImage to PDF Converter
Convert images to PDF online for free. Combine multiple images into a single PDF document with custom page settings.
MediaImage Cropper
Crop images online for free. Select any region with drag handles, choose aspect ratios like 1:1, 4:3, or 16:9, and download the result instantly. No upload to server.
MediaImage Color Extractor
Upload any image and instantly extract the dominant colors as HEX and RGB values. Perfect for designers who want to match colors from photos, logos, or screenshots.
MediaImage Format Converter
Convert images between JPEG, PNG, and WebP formats instantly in your browser. Adjust quality for JPEG and WebP, compare file sizes, and download the result.
MediaPlaceholder Image Generator
Create custom placeholder images at any size, color, and label. Download as SVG, PNG, or JPEG β all in your browser.
Media