Free Developer Tools Online
26+ free browser-based developer tools. All tools process data locally — no upload, no signup, completely private. Works on desktop, tablet, and mobile.
All Developer Tools (26)
QR Code Generator
Free online QR code generator to create custom QR codes for URLs, text, WiFi, and business cards instantly. Generate hig…
JSON Formatter
Free online JSON formatter and validator to instantly beautify, parse, and validate JSON data. Pretty print raw JSON, fi…
Base64 Encoder
Free online Base64 encoder and decoder to instantly encode text, images, and files to Base64 or decode Base64 strings ba…
UUID Generator Bulk
Free online UUID generator to instantly create unique UUIDs (v1, v4) and GUIDs for databases, APIs, and applications. Ge…
URL Encoder/Decoder
Free online URL encoder and decoder to instantly encode or decode URLs and percent-encoded characters. Convert special c…
Remove Duplicate Lines
Free online tool to instantly remove duplicate lines and repeated text from any content. Filter unique lines, deduplicat…
JWT Decoder
Free online JWT decoder to instantly decode and inspect JSON Web Token payloads, headers, and claims. Debug JWT tokens, …
Regex Tester
Free online regex tester to instantly test and debug regular expressions with real-time matching. Supports JavaScript, P…
SQL Formatter
Free online SQL formatter and beautifier to instantly format and indent SQL queries. Supports MySQL, PostgreSQL, Oracle,…
HTML Minifier
Free online HTML minifier to instantly compress and optimize HTML code. Remove whitespace, comments, and redundant code …
CSS Minifier
Free online CSS minifier to instantly compress and optimize CSS stylesheets. Remove whitespace, comments, and redundant …
JS Minifier
Free online JavaScript minifier to instantly compress and optimize JS code. Remove whitespace, comments, and shorten var…
Hash Generator
Free online hash generator to instantly create MD5, SHA1, SHA256, SHA512, and bcrypt hashes. Generate secure cryptograph…
UUID Batch
Free online batch UUID generator to instantly create hundreds of UUIDs and GUIDs in bulk. Generate, copy, and export mul…
CSS Box Shadow Generator
Free online CSS box shadow generator to create custom shadow effects with live preview. Adjust blur, spread, color, and …
CSS Clip Path Generator
Free online CSS clip path generator to create custom shapes and polygon clip paths with live visual preview. Generate CS…
HTML Table Generator
Free online HTML table generator to instantly create responsive, styled HTML tables with custom rows, columns, and CSS. …
HTML Form Generator
Free online HTML form generator to instantly create responsive contact forms, login forms, and registration forms with c…
JSON Diff Checker
Free online JSON diff checker to instantly compare two JSON files and highlight differences. Identify added, removed, an…
API Tester
Free online API tester to send HTTP requests and test REST API endpoints instantly. A powerful Postman alternative for d…
RSS Feed Generator
Free online RSS feed generator to instantly create custom RSS XML feeds for websites, blogs, podcasts, and news sites. B…
Cron Expression Parser
Free online cron expression parser and generator to instantly decode cron schedules into human-readable format. Validate…
.htaccess Generator
Free online .htaccess generator to instantly create Apache redirect rules, mod_rewrite rules, and security configuration…
Code Beautifier & Minifier
Free online code beautifier and minifier supporting HTML, CSS, JavaScript, JSON, SQL, and XML. Instantly format, indent,…
CSS Beautifier
Free online CSS beautifier and formatter to instantly clean, indent, and format CSS stylesheets. Convert minified or mes…
JSON Minifier
Free online JSON minifier to instantly compress and compact JSON data by removing whitespace and formatting. Reduce JSON…