GEXNO / Guides
GEXNO Guides
All GEXNO feature tutorials in one place: HEIC to JPG, image compression, JSON formatting and code generation, Base64 encoding, step-by-step guides with screenshots and FAQs.
How to Convert iPhone HEIC Photos to JPG Online (No Software)
HEIC is the default iPhone photo format that Windows, WeChat and many websites cannot open. Learn how to batch-convert HEIC photos to JPG entirely in your browser — photos never leave your device.
How to Compress Images: 3 Ways to Hit a Target File Size Without Ruining Quality
Photo too large to upload? Learn how image compression actually works, how to hit a target KB size, and how to shrink photos in your browser — originals never uploaded.
JSON to Java POJO: Generate Jackson/Gson-Compatible Classes Online
Got a pile of JSON from a third-party API? Convert it to Java POJOs / Records online — nested objects and arrays supported, and the code never leaves your browser.
How to Format JSON Online: Minify, Validate and Read Error Messages
JSON squashed into one unreadable line? Learn to format, minify and validate JSON online, and recognize the most common JSON errors — trailing commas, single quotes, smart quotes. All local.
JSON to TypeScript: Generate Interfaces Online and Ditch any
Hand-writing TypeScript types from API JSON is exhausting. Convert JSON to interface / type online — nested objects split automatically, processed locally, never uploaded.
What Is Base64? Encoding, Decoding and Image-to-Base64 Explained
Base64 is not encryption! A plain-language guide to how Base64 works and when to use it, plus online encoding/decoding for text and files — all local, nothing uploaded.
What is MCP? A Quick Start Guide for Developers
A plain-language introduction to the Model Context Protocol (MCP): the problem it solves, how to choose servers, and where to find quality MCP repositories on GEXNO.
What Are Cursor / Claude Skills?
What Agent Skills do, how they differ from MCP, and how to discover official and community Skill repositories on GEXNO.
Never Miss a Renewal: Meet GEXNO Remind
Track bills, subscriptions and domain expiry dates with GEXNO Remind, and get email reminders before they lapse.
Choosing an Online Image Tool: Compression, Conversion and Privacy
What to look for when compressing images, converting formats or cropping online, why local processing beats uploading to a server, and how to use the 26 image tools in GEXNO ImgTools.