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Developer Tools

20 tools

Free developer tools — online code compiler (40+ languages), code editor, JSON formatter, Base64, URL encoder, regex tester, color picker, JWT decoder, diff checker, CSS minifier, markdown preview, and more.

All Developer Tools

sorted by popularity
⚙️ 01 Online Code Editor Write and edit HTML, CSS, JS, PHP and more with syntax highlighting Open → ⚙️ 02 Online Code Compiler Run Python, Java, C++, Go and 40+ languages free in your browser Open → ⚙️ 03 JSON Formatter Beautify, minify, and validate JSON with error highlighting Open → ⚙️ 04 Base64 Encode/Decode Encode or decode text and files to/from Base64 format Open → ⚙️ 05 URL Encode/Decode Encode or decode URLs and query strings Open → ⚙️ 06 Regex Tester Test regular expressions with real-time match highlighting Open → ⚙️ 07 Color Picker Convert between HEX, RGB, HSL color codes with color picker Open → ⚙️ 08 Timestamp Converter Convert Unix timestamps to human-readable dates and back Open → ⚙️ 09 HTML Encoder/Decoder Encode and decode HTML entities for safe web output Open → ⚙️ 10 Diff Checker Compare two texts and highlight added and removed lines Open → ⚙️ 11 Number Base Converter Convert numbers between Decimal, Binary, Octal and Hex Open → ⚙️ 12 JWT Decoder Decode and inspect JSON Web Tokens (header, payload) Open → ⚙️ 13 Markdown Preview Write Markdown and see live HTML preview side by side Open → ⚙️ 14 CSS Minifier Minify and beautify CSS code instantly Open → ⚙️ 15 JSON to CSV Convert JSON arrays to CSV format for Excel and spreadsheets Open → ⚙️ 16 Cron Generator Build cron job expressions with a visual scheduler Open → ⚙️ 17 Meta Tag Generator Generate SEO meta tags and Open Graph tags for any page Open → ⚙️ 18 CSS Gradient Generator Create linear and radial CSS gradients with live preview Open → ⚙️ 19 Internet Speed Test Test your download speed, upload speed and ping latency for free Open → ⚙️ 20 .gitignore Generator Pick languages, frameworks, IDEs and OS — get a ready-to-use .gitignore Open →

Other categories

🧰 🧰 Productivity 18 🎨 🎨 Design Tools 6 🖼 🖼 Image Tools 7 🎬 🎬 Media Converters 3 📄 📄 Office Tools 2 🔑 🔑 Generators 6 🏦 🏦 Finance & Tax 21 🩺 🩺 Health & Fitness 7 🔢 🔢 Math & Numbers 9 ✍️ ✍️ Text Tools 6 🗓 🗓 Date & Time 5 📐 📐 Unit Converters 2 🎲 🎲 Fun & Entertainment 7