DevToys New Tab by Oleg Abrazhaev

🛠️ DevToys New Tab: Swiss Army Knife for Developers
Turn your browser's new tab into a fast developer tools workspace. DevToys New Tab is a dev utils Firefox extension that bundles 80+ essential utilities across formatting, encoding, data conversion, network tools, security, testing, and image/color tools. Most tools run locally in your browser (offline), so you can work without relying on random online converters.

📌 Local tools + GA4 analytics
Tool inputs are processed locally in your browser. The extension uses Google Analytics (GA4) for basic usage analytics (e.g., feature usage). DevToys does not sell personal data.

🔍 Middle Box Search
The new tab page includes a search box that uses your browser's default search engine via Firefox search APIs.
• Search requires an internet connection.
• Developer tools work offline.

🚀 Quick Start Guide
1. Install the extension
2. Open a new tab OR click the extension icon for a popup view
3. Use the search box to search the web with your default search engine
4. Select a tool from the sidebar
5. Start working immediately

💡 Two Ways to Access Dev Tools
• New Tab — Opens automatically for instant developer tools access
• Popup — Click the extension icon for a quick dev toolbox without opening a new tab

✅ 80+ Developer Tools Included

🔧 Formatters & Validators
JSON formatter/validator, SQL formatter, XML formatter/validator, YAML formatter, CSS formatter, HTML formatter, JavaScript formatter, TOML formatter

🔐 Encoders, Decoders & Escaping
Base64 (standard + URL-safe), Base64 image encoder/decoder, Base58, JWT decoder, URL encoder/decoder, HTML encoder/decoder, Hex↔ASCII, Quoted Printable, GZip compressor/decompressor, Certificate decoder, Text escape/unescape

🧪 Testers & Validators
Regex tester, JSONPath tester, JSON Schema validator, XML/XSD validator, URL parser, query string parser, user agent parser, IBAN validator, password strength checker

🗂️ Converters
JSON↔CSV, JSON↔YAML, JSON↔TOML, YAML↔TOML, XML↔JSON, Markdown↔HTML, HTML↔JSX, cURL→code, JSON→code, date converter, number base (bin/oct/dec/hex), data size converter, chmod calculator, cron parser, cron expression generator, roman numerals, OPML↔RSS

🔑 Generators
Hash generator (MD5, SHA-1, SHA-256, SHA-512), HMAC generator, UUID v4, QR code generator, BCrypt hasher, RSA key pair generator, OTP generator, password generator, fake data generator, lorem ipsum generator, basic auth header generator

🌐 Network Tools
IPv4 range calculator, IPv4 converter, IPv4 subnet calculator, IPv6 parser

📝 Text Utilities
Text diff (side-by-side), list compare (diff/intersection), markdown preview, text analyzer, string replacer, line utilities (sort/dedup/trim), HTML preview

🖼️ Image Tools
Image compressor, image converter (PNG/JPG/WebP/etc.), image resizer, image cropper, image boxing (letterbox/pillarbox padding)

🎨 Color Tools
Color picker (multiple formats), color blindness simulator, color contrast checker

📄 Document Tools
Word document comparison, PowerPoint text extractor

💎 Why Developers Use DevToys New Tab
➤ One place for 80+ daily dev tools: formatters, converters, validators, generators, network utils, and image tools
➤ Offline developer tools for focused workflows (tools offline; search needs internet)
➤ Clean, modern interface built for speed
➤ Local processing for tool inputs
➤ Built for Firefox

🧐 FAQs
❓ Does the extension work offline?
💡 Developer tools work offline. The search box requires internet because it uses your default search engine.

❓ Does the search box change my default search engine?
💡 No. The search box uses Firefox search APIs and respects your current browser search settings.

❓ Is my data secure?
💡 Tool inputs are processed locally in your browser. The extension uses Google Analytics (GA4) for basic usage analytics.

❓ How do I access the tools?
💡 Open a new tab (loads automatically) OR click the extension icon for a popup view.

🎯 Perfect For
• Frontend, backend, and DevOps engineers
• API developers formatting JSON/XML and converting data
• Security-focused developers (JWT, BCrypt, RSA, OTP, certificates)
• Network engineers working with IPv4/IPv6 utilities
• Designers and frontend engineers using image tools, color picker, and accessibility checks
• Anyone who needs fast conversions, validation, and text transformations

Install DevToys New Tab for Firefox and get 80+ developer tools in your new tab: JSON/SQL/XML/YAML/CSS/HTML/JS/TOML formatters, Base64/JWT/URL/GZip encoders, hash/HMAC/UUID/QR/BCrypt/RSA generators, regex/JSONPath/JSON Schema testers, 20+ converters, IPv4/IPv6 tools, image tools, color tools, and more.