# DevTools Pro > DevTools Pro is a free, all-in-one website of 71 online developer tools. It covers JSON and data formatting, encoding, text and code utilities, image tools, and generators for robots.txt, sitemaps, .htaccess and more. There is nothing to install and no account to create. DevTools Pro (https://dev-tools.ytools.in) is free and needs no sign-up. Almost every tool processes data locally in the browser; IP Lookup and DNS Lookup query public lookup services. Full per-tool documentation: https://dev-tools.ytools.in/llms-full.txt ## Accessibility - [Text to Speech](https://dev-tools.ytools.in/tools/text-to-speech): This text to speech tool reads any text aloud in your browser using the Web Speech API and the voices available on your device. ## Code - [CSS Formatter](https://dev-tools.ytools.in/tools/css-formatter): This CSS formatter beautifies messy or minified stylesheets into readable, consistently indented code, and can minify CSS for production with one toggle. - [SQL Formatter](https://dev-tools.ytools.in/tools/sql-formatter): This SQL formatter turns a long, single-line query into readable SQL with each clause on its own line, consistent indentation and the keyword case you prefer. - [XML Formatter](https://dev-tools.ytools.in/tools/xml-formatter): This XML formatter pretty-prints, minifies and checks XML for well-formedness, keeping comments, CDATA sections, processing instructions and attributes intact. - [Code Beautifier](https://dev-tools.ytools.in/tools/beautify-code): This code beautifier re-indents minified or messy JavaScript, CSS, HTML, XML and JSON so you can actually read it. - [Code Snippet Formatter](https://dev-tools.ytools.in/tools/code-snippet-formatter): This code snippet formatter turns plain code into a syntax-highlighted card with a theme, line numbers and an optional window frame, ready to export as a PNG image. - [HTML Table Generator](https://dev-tools.ytools.in/tools/html-table-generator): Convert a table to HTML in seconds: paste cells copied from Excel or Google Sheets, CSV or a Markdown table, or type data into the editable grid, and this HTML table generator returns clean, accessible table markup with optional CSS, previewed live. ## Comparison - [Text Diff Checker](https://dev-tools.ytools.in/tools/text-diff): This text diff checker compares two versions of any text and highlights exactly which lines were added, removed or changed. ## Data - [JSON Formatter](https://dev-tools.ytools.in/tools/json-formatter): This JSON formatter and validator pretty-prints, minifies and sorts JSON as you type, and pinpoints the exact line and column of any syntax error. - [JSON to CSV Converter](https://dev-tools.ytools.in/tools/json-csv-converter): This JSON to CSV converter turns an array of JSON objects into a spreadsheet-ready CSV file, flattening nested objects into dotted columns. - [CSV to JSON Converter](https://dev-tools.ytools.in/tools/csv-json-converter): This CSV to JSON converter parses CSV or TSV data into a JSON array, using the header row as object keys. - [JSON Path Finder](https://dev-tools.ytools.in/tools/json-path-finder): This JSONPath tester evaluates a JSONPath expression against your JSON and shows every match with its exact path, updating as you type. ## Design - [Color Palette Generator](https://dev-tools.ytools.in/tools/color-palette): This color palette generator turns one base color into a harmonious scheme using six classic color-wheel rules: monochromatic, analogous, complementary, split complementary, triadic and tetradic. - [Color Blindness Simulator](https://dev-tools.ytools.in/tools/color-blindness-simulator): This color blindness simulator shows how an image or a single color looks to people with eight types of color vision deficiency, including protanopia, deuteranopia and tritanopia. - [Loading Spinner Generator](https://dev-tools.ytools.in/tools/loading-spinner-generator): This loading spinner generator creates pure CSS loaders in nine styles, from a classic circular spinner to dots, bars, ripple and wave. - [Device Mockup Generator](https://dev-tools.ytools.in/tools/device-mockup-generator): This device mockup generator places your screenshot inside an iPhone, iPad or MacBook frame and exports it as a PNG on a background color you choose. - [Favicon Generator](https://dev-tools.ytools.in/tools/favicon-generator): This favicon generator turns a single PNG, JPG, SVG or GIF into a complete favicon set: a multi-size favicon.ico, nine PNG icons from 16×16 to 512×512, an Apple touch icon and a site.webmanifest. - [CSS Gradient Generator](https://dev-tools.ytools.in/tools/gradient-generator): This CSS gradient generator writes the background code for linear, radial and conic gradients while you adjust colors, stop positions and the angle. - [Box Shadow Generator](https://dev-tools.ytools.in/tools/box-shadow-generator): This box shadow generator builds the CSS box-shadow property with sliders for offset, blur, spread, color, opacity and inset, and lets you stack several shadow layers in one rule. - [CSS Animation Generator](https://dev-tools.ytools.in/tools/css-animation-generator): This CSS animation generator writes a complete @keyframes block plus the matching animation-* properties while you watch the result on a live preview element. - [Social Media Image Generator](https://dev-tools.ytools.in/tools/social-media-image-generator): This social media image generator creates text-based graphics at the exact pixel size each platform expects, from a 1200×630 Open Graph card to a 1080×1920 story. - [Magic Gradient Tool](https://dev-tools.ytools.in/tools/magic-gradient-tool): The Magic Gradient Tool is a gradient explorer: click Random for a fresh color combination or pick one of four hand-made presets, then fine-tune it and copy the CSS. ## Development - [Environment File Generator](https://dev-tools.ytools.in/tools/env-file-generator): This .env file generator builds a valid .env file and a matching .env.example from a list of variables, with starter templates for Node.js, Next.js, Vite, Django, Laravel, Rails, Docker Compose and Spring Boot. - [Gitignore Generator](https://dev-tools.ytools.in/tools/gitignore-generator): This gitignore generator builds a .gitignore file by combining templates for 26 languages, frameworks, game engines, operating systems and tools, from Node.js and Python to Unity, macOS and Terraform. - [Docker Compose Generator](https://dev-tools.ytools.in/tools/docker-compose-generator): This Docker Compose generator builds a ready-to-run docker-compose.yml from service presets such as Node.js, PostgreSQL, MySQL, Redis and Nginx. ## Documentation - [API Documentation Generator](https://dev-tools.ytools.in/tools/api-documentation-generator): This API documentation generator turns an OpenAPI 3 or Swagger 2 spec, in JSON or YAML, into readable reference docs grouped by tag. ## Encoding - [Base64 Encoder/Decoder](https://dev-tools.ytools.in/tools/base64-encoder): This Base64 encoder and decoder converts UTF-8 text or any file to Base64 and back as you type, with an optional URL-safe (base64url) output. - [String Encoder/Decoder](https://dev-tools.ytools.in/tools/string-encoder): This string encoder escapes and unescapes text for four contexts: HTML entities, XML entities, JavaScript string literals and CSS identifiers. - [HTML Encoder/Decoder](https://dev-tools.ytools.in/tools/html-encoder): This HTML encoder and decoder converts special characters into HTML entities and turns entities back into readable text. - [URL Encoder/Decoder](https://dev-tools.ytools.in/tools/url-encoder): This URL encoder and decoder percent-encodes text for use in URLs and decodes %20-style sequences back into readable characters. ## Inspiration - [Random Quote Generator](https://dev-tools.ytools.in/tools/quote-generator): This random quote generator shows a quote from a hand-checked list of 35, filtered by category: motivation, inspiration, life, wisdom, success, happiness or programming. ## Math - [Number Base Converter](https://dev-tools.ytools.in/tools/number-base-converter): This number base converter translates integers between binary, octal, decimal and hexadecimal at the same time: type into any of the four fields and the other three update instantly. - [Unit Converter](https://dev-tools.ytools.in/tools/unit-converter): This unit converter changes values between metric and imperial units of length, weight, temperature, volume, area, speed, time and digital storage. - [Calculator](https://dev-tools.ytools.in/tools/calculator): This online calculator handles everyday arithmetic with the correct order of operations, so 2 + 3 × 4 gives 14, not 20. ## Media - [Image Converter](https://dev-tools.ytools.in/tools/image-converter): This image converter changes PNG, JPG, WebP, GIF, AVIF, BMP and SVG files into JPG, PNG or WebP directly in your browser. - [Image Resizer](https://dev-tools.ytools.in/tools/image-resizer): This image resizer changes the width and height of a photo or graphic to exact pixel dimensions or a percentage of the original. - [Base64 Image Converter](https://dev-tools.ytools.in/tools/base64-image-converter): This Base64 image converter turns any PNG, JPEG, GIF, WebP, AVIF, BMP, ICO or SVG file into a Base64 string or data URI, and decodes Base64 back into an image you can preview and download. - [Image Compressor](https://dev-tools.ytools.in/tools/image-compressor): This free online image compressor for developers shrinks JPG, PNG, WebP and other images by re-encoding them as WebP or JPEG at a quality level you choose, entirely in your browser. - [SVG Optimizer](https://dev-tools.ytools.in/tools/svg-optimizer): This SVG optimizer shrinks SVG files by removing editor metadata, comments, empty groups and extra whitespace, and by rounding coordinates to the number of decimal places you choose. ## Network - [IP Address Lookup](https://dev-tools.ytools.in/tools/ip-lookup): This IP lookup tool shows your public IP address as soon as the page opens and finds the approximate location, ISP, organization, ASN and time zone of any IPv4 or IPv6 address. - [DNS Lookup Tool](https://dev-tools.ytools.in/tools/dns-lookup): This DNS lookup tool queries the live A, AAAA, CNAME, MX, TXT, NS, SOA and CAA records of any domain and shows each answer with its TTL. ## Performance - [Code Minifier](https://dev-tools.ytools.in/tools/minify-code): This code minifier shrinks JavaScript, CSS, HTML and JSON by removing comments and unnecessary whitespace, and shows exactly how many bytes you saved. - [Performance Budget Calculator](https://dev-tools.ytools.in/tools/performance-budget-calculator): This performance budget calculator lets you set limits for page weight and Core Web Vitals, compare your measured values against them, and estimate how long the page takes to download on connections from 2G to fiber. ## SEO - [Robots.txt Generator](https://dev-tools.ytools.in/tools/robots-txt-generator): Make a robots.txt file online in a minute: this robots.txt generator writes the plain-text file that tells search engine and AI crawlers which parts of your site they may request. - [Meta Tag Generator](https://dev-tools.ytools.in/tools/meta-tag-generator): This meta tag generator builds the HTML tags a page needs for search results and social sharing: title, description, robots, canonical, Open Graph and Twitter Card tags. - [XML Sitemap Generator](https://dev-tools.ytools.in/tools/sitemap-generator): This XML sitemap generator turns a list of paths or full URLs into a valid sitemap.xml that follows the sitemaps.org 0.9 protocol. ## Security - [Hash Generator](https://dev-tools.ytools.in/tools/hash-generator): This free hash generator computes MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text or file, right in your browser. - [Password Generator](https://dev-tools.ytools.in/tools/password-generator): This password generator creates strong random passwords from 4 to 128 characters long, using your browser's cryptographically secure random number generator. - [JWT Decoder](https://dev-tools.ytools.in/tools/jwt-decoder): This JWT decoder splits a JSON Web Token into its header, payload and signature and shows each part as formatted JSON. ## Testing - [Regex Tester](https://dev-tools.ytools.in/tools/regex-tester): This regex tester runs JavaScript regular expressions against your text and highlights every match as you type. - [Mock API Data Generator](https://dev-tools.ytools.in/tools/mock-data-generator): This mock data generator creates realistic test records, such as users, orders, products and transactions, and exports them as JSON, CSV or a ready-to-run SQL script. - [JSON Mock Data Generator](https://dev-tools.ytools.in/tools/json-mock-data-generator): This JSON mock data generator builds a JSON array of realistic fake records from a field list you define, ready to drop into a mock API, a frontend fixture or a unit test. ## Text - [Case Converter](https://dev-tools.ytools.in/tools/case-converter): This case converter rewrites any text or identifier in ten formats at once: camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case, dot.case, UPPER CASE, lower case, Title Case and Sentence case. - [Lorem Ipsum Generator](https://dev-tools.ytools.in/tools/lorem-generator): This lorem ipsum generator creates placeholder text by the paragraph, sentence or word, ready to drop into a wireframe, mockup or HTML template. - [Markdown Preview](https://dev-tools.ytools.in/tools/markdown-preview): This Markdown preview editor renders GitHub-flavored Markdown live as you type: headings, nested lists, task lists, tables, fenced code blocks and more. - [Word Counter](https://dev-tools.ytools.in/tools/word-counter): This word counter tallies words, characters, sentences, paragraphs and lines the moment you type or paste text. - [Text Formatter](https://dev-tools.ytools.in/tools/text-formatter): This text formatter cleans up messy text in one pass: collapse extra spaces, trim lines, remove empty or duplicate lines, sort or reverse lines, and change case. - [ASCII Art Generator](https://dev-tools.ytools.in/tools/ascii-art-generator): This ASCII art generator turns text into large banner lettering made of characters, or converts any image into ASCII art. - [Markdown Table Generator](https://dev-tools.ytools.in/tools/markdown-table-generator): This Markdown table generator lets you build a table in a spreadsheet-style grid and copies it out as clean, aligned Markdown. ## Time - [Timestamp Converter](https://dev-tools.ytools.in/tools/timestamp-converter): This Unix timestamp converter turns epoch time into ISO 8601, UTC, local and any-time-zone dates, and turns date strings back into epoch seconds and milliseconds. - [Stopwatch & Timer](https://dev-tools.ytools.in/tools/stopwatch-timer): This online stopwatch and countdown timer measures elapsed time to the hundredth of a second with lap splits, and counts down from any duration up to 99 hours with an audible alarm. ## Utilities - [UUID Generator](https://dev-tools.ytools.in/tools/uuid-generator): This UUID generator creates version 4, 7 and 1 UUIDs (plus the special Nil and Max values) in batches of up to 1,000, using your browser's cryptographically secure random number generator. - [QR Code Generator](https://dev-tools.ytools.in/tools/qr-generator): This free QR code generator turns a URL, plain text, email address, phone number, SMS, WiFi network or contact card into a scannable QR code. - [Random Data Generator](https://dev-tools.ytools.in/tools/random-data-generator): This random data generator produces lists of random names, emails, addresses, phone numbers, companies, dates and numbers, up to 1,000 rows at a time. - [WiFi QR Code Generator](https://dev-tools.ytools.in/tools/wifi-qr-generator): The WiFi QR code generator creates a code that connects a phone to your wireless network in one scan, with no password typing. - [File Format Converter](https://dev-tools.ytools.in/tools/file-converter): This file format converter handles two jobs in one place: batch-converting images to PNG, JPG or WebP, and converting data between JSON, CSV, TSV, XML and YAML. - [Cron Expression Generator](https://dev-tools.ytools.in/tools/cron-expression-generator): This cron expression generator builds and explains standard 5-field cron schedules, like the ones used by crontab, Kubernetes CronJobs and GitHub Actions. - [Browser Information](https://dev-tools.ytools.in/tools/browser-info): This browser info tool answers "what is my browser?" by showing your browser name and version, operating system, user agent, screen and viewport size, language, time zone, network, hardware, GPU and support for 20 web platform features. ## Validation - [Credit Card Validator](https://dev-tools.ytools.in/tools/credit-card-validator): This credit card validator checks whether a card number is well-formed: it runs the Luhn checksum, detects the card brand from its prefix, and confirms the length, expiry date and CVV format. - [JSON Schema Validator](https://dev-tools.ytools.in/tools/json-schema-validator): This JSON Schema validator checks a JSON document against a JSON Schema (draft-07) and lists every rule it breaks, each with a JSON Pointer path and the failing keyword. ## Web - [.htaccess Generator](https://dev-tools.ytools.in/tools/htaccess-generator): This .htaccess generator writes Apache configuration for the jobs most sites need: forcing HTTPS, choosing www or non-www, 301 redirects, custom error pages, gzip compression, browser caching, security headers and hotlink protection. ## Optional - [All tools](https://dev-tools.ytools.in/tools): searchable list of all 71 tools - [About](https://dev-tools.ytools.in/about) - [Privacy Policy](https://dev-tools.ytools.in/privacy-policy)