Free Online Developer Tools, Linux Resources & Tech Guides
Free online developer tools, Linux and Ubuntu resources, Raspberry Pi guides and practical tutorials — all free, many running entirely in your browser.
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Discover practical tools, tutorials and resources across a range of technology topics.
Developer ToolsFree online utilities for coding, formatting, converting, debugging and working with data.
Linux & UbuntuLinux commands, system administration, configuration, troubleshooting and hands-on tutorials.
Raspberry PiProjects, setup guides, configuration and useful tools for Raspberry Pi enthusiasts.
Django & PythonPractical development resources, utilities and guides for building web applications.
PowerShellCommands, scripts and resources for Windows administration and automation.
Tech GuidesClear, practical guides to help you understand technology and solve everyday problems.
Featured Tools
Practical browser-based utilities for everyday technical tasks. Many run 100% in your browser, so your data never leaves your device.
JSON Formatter & ValidatorFormat, minify and validate JSON with exact error locations and a tree view.
QR Code MakerGenerate QR codes for links, Wi-Fi, vCards and more.
Password GeneratorStrong random passwords with a live strength meter.
Base64 Encoder & DecoderConvert text and files to/from Base64, with URL-safe variants and data URIs.
Unix Timestamp ConverterConvert epoch timestamps to UTC and local dates, with a live clock and date parser.
JWT Decoder & InspectorDecode JSON Web Tokens to inspect header, claims, expiry and signature.
TTS EngineTurn text into natural speech with an in-browser AI model — nothing uploaded.
Color Converter & Palette GeneratorConvert HEX, RGB, HSL and CMYK, build palettes and check WCAG contrast.
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Explore Linux Without Installing Anything
Learn, experiment and explore Linux through browser-based environments you can run right now. Try Linux commands, practise working in the terminal and build real understanding — nothing you type ever leaves your device.
Learn Something New
Clear, practical guides to help you understand technology, solve problems and build new skills.
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Practical Technology Resources for Everyone
TechGeek brings together free online developer tools, Linux resources, programming utilities and practical technology guides. Whether you're a developer, system administrator, student or technology enthusiast, you'll find resources to help you work smarter, learn new skills and solve everyday technical problems.
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