Best Free Development Tools Online (2026 Guide)
FreeHelper
in
Blog
Oct 13 /
1 hour ago
JSON, XML, UUIDs and encodings: the small developer chores that eat afternoons, solved by free online utilities.
All Development Tools tools
| Tool | What it does |
|---|---|
| UUID Generator | Generate unique UUIDs and GUIDs instantly. Free UUID generator for developers, bulk options included. |
| Lorem Ipsum Generator | Generate lorem ipsum placeholder text in seconds. Free lorem ipsum generator with word control. |
| JSON to XML | Convert JSON data to XML format in one click. Free JSON to XML converter for developers, instant. |
| JSON Viewer | View and explore JSON in a clean tree layout. Free online JSON viewer with validation, no signup. |
| JSON Formatter | Format and beautify messy JSON into readable code. Free JSON formatter with syntax highlighting. |
| JSON Validator | Validate JSON syntax and find errors instantly. Free JSON validator showing exact error positions. |
| JSON Beautifier | Beautify JSON with proper indentation and colors. Free JSON beautifier, paste and format in seconds. |
| JSON Editor | Edit JSON online with tree view and validation. Free JSON editor in your browser, no install needed. |
| Xml to JSON | Convert XML documents to JSON format quickly. Free XML to JSON converter for developers online. |
How to choose the right tool
Start from your end goal and work backwards: pick the tool whose name matches your task, run it once on a copy, then check the output before using it for real work. Every tool page includes steps, tips and FAQs.
Pro tip
Validate JSON before pasting it into code — one comma breaks everything.
Are these development tools really free?
Yes. Every tool linked above is free on FreeHelper with no signup, no watermarks and no trial clocks. Start with the most popular one for your task: UUID Generator.