Free Online Tools for Developers, SEOs & Designers
25+ free browser-based tools. No signup, no server processing. Your data stays in your browser.
📝 Text & String Tools
Format, convert, and manipulate text and strings
JSON Formatter & Validator
Format, beautify, and validate JSON data instantly in your browser. Free online JSON formatter with syntax highlighting and error detection.
JSON to CSV Converter
Convert JSON data to CSV format instantly. Free online JSON to CSV converter that handles nested objects and arrays.
JSON to XML Converter
Convert JSON data to XML format online. Free tool that transforms JSON objects into well-formed XML documents.
Base64 Encode & Decode
Encode text to Base64 or decode Base64 strings instantly. Free online Base64 encoder and decoder with UTF-8 support.
URL Encode & Decode
Encode or decode URL components instantly. Free online URL encoder and decoder using encodeURIComponent and decodeURIComponent.
MD5, SHA1, SHA256 Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text. Free online hash generator with instant results.
UUID Generator (v4)
Generate random UUID v4 identifiers instantly. Free online UUID generator for creating unique IDs for databases, APIs, and more.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text instantly. Choose paragraphs, sentences, or words. Free online lorem ipsum generator.
Word Counter & Character Counter
Count words, characters, sentences, and paragraphs instantly. Free online word counter with reading time estimation.
Text Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case, kebab-case, and more. Free online case converter.
Find and Replace Text
Find and replace text with regex support. Free online find and replace tool with case sensitivity and whole word matching.
Diff Checker — Compare Two Texts
Compare two texts side by side and see the differences highlighted. Free online diff checker for text comparison.
🔍 SEO & Marketing Tools
Optimize your website for search engines
Meta Tag Generator
Generate HTML meta tags for SEO optimization. Free online meta tag generator for title, description, viewport, robots, and more.
Open Graph Tag Generator
Generate Open Graph meta tags for social media sharing. Free online OG tag generator for Facebook, Twitter, and LinkedIn.
Robots.txt Generator
Generate a robots.txt file for your website. Free online robots.txt generator with allow/disallow rules and sitemap support.
Sitemap XML Generator
Generate XML sitemaps for search engines. Free online sitemap generator with priority and change frequency settings.
Google SERP Preview Tool
Preview how your page will appear in Google search results. Free SERP preview tool with title and description length indicators.
Keyword Density Checker
Analyze keyword density in your text. Free online keyword density checker showing word and phrase frequency with stop word filtering.
SEO Score Checker
Check basic on-page SEO score for any text or HTML. Free SEO score checker analyzing title, description, headings, and more.
🎨 Color & Design Tools
Pick colors, generate gradients and CSS effects
Color Picker & Converter
Pick colors and convert between HEX, RGB, and HSL formats. Free online color picker with one-click copy for any format.
CSS Gradient Generator
Create CSS gradients visually. Free online gradient generator for linear and radial gradients with color stop controls.
CSS Box Shadow Generator
Generate CSS box-shadow properties visually. Free online box shadow generator with live preview and sliders for all parameters.
CSS Border Radius Generator
Generate CSS border-radius properties visually. Free online border radius generator with individual corner controls and live preview.
🔐 Encoder & Decoder Tools
Encode and decode various formats
HTML Entity Encode & Decode
Encode or decode HTML entities instantly. Free online tool for converting between HTML characters and entity references.
JWT Decoder
Decode JSON Web Tokens (JWT) to view header and payload. Free online JWT decoder with expiration check and formatted output.
HTML to Markdown Converter
Convert HTML to Markdown and Markdown to HTML. Free online bidirectional converter between HTML and Markdown formats.
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