Development Tools
Free developer tools to format, validate, view and convert JSON and XML, generate UUIDs and Lorem Ipsum. Fast, private and no sign-up. Try now!
Free Developer Tools – JSON, XML & UUID Online
Free Developer Tools – JSON, XML & UUID Online
- 🧰 9 free tools
- 💸 100% free
- 🔓 No sign-up
- 📱 Works on any device
- 🔒 Secure HTTPS
Developer tools format, validate and convert data so you can debug APIs and configuration files faster.
All 9 Free Development Tools
JSON to XMLConvert JSON data into XML format online instantly
JSON ViewerView JSON data in a clear, collapsible tree format
JSON FormatterFormat and pretty-print JSON with proper indentation online
JSON ValidatorValidate JSON online and find syntax errors quickly
JSON BeautifierBeautify messy or minified JSON into clean, readable code
JSON EditorEdit JSON data online with a simple, structured editor
Xml to JSONConvert XML data into JSON format online
UUID GeneratorGenerate random UUIDs (version 4 GUIDs) online instantly
Lorem Ipsum GeneratorGenerate Lorem Ipsum placeholder text in paragraphs, sentences or words
| Tool | What it does | Input / Best for |
|---|---|---|
| JSON to XML | Convert JSON data into XML format online instantly | JSON → XML |
| JSON Viewer | View JSON data in a clear, collapsible tree format | code → clean output |
| JSON Formatter | Format and pretty-print JSON with proper indentation online | code → clean output |
| JSON Validator | Validate JSON online and find syntax errors quickly | code → clean output |
| JSON Beautifier | Beautify messy or minified JSON into clean, readable code | code → clean output |
| JSON Editor | Edit JSON data online with a simple, structured editor | code → clean output |
| Xml to JSON | Convert XML data into JSON format online | Xml → JSON |
| UUID Generator | Generate random UUIDs (version 4 GUIDs) online instantly | code → clean output |
| Lorem Ipsum Generator | Generate Lorem Ipsum placeholder text in paragraphs, sentences or words | code → clean output |
JSON to XML
JSON and XML are both data formats. Some systems, APIs and feeds still require XML, so converting JSON to XML saves manual rewriting.
Open JSON to XML →JSON Viewer
A JSON viewer makes large or minified JSON readable by showing it as a structured tree you can expand and collapse.
Open JSON Viewer →JSON Formatter
A JSON formatter adds line breaks and indentation to compact JSON so it is easy to read and debug.
Open JSON Formatter →JSON Validator
A JSON validator checks whether your JSON follows the correct syntax and points out problems like missing commas, quotes or brackets.
Open JSON Validator →How to Use Our Development Tools
- Paste your code or data into the input box (or upload a file where supported).
- Choose any options such as indentation.
- Click the action button.
- Copy or download the output.
Development Tools – Quick Reference
| Feature | JSON | XML |
|---|---|---|
| Syntax | Key–value pairs, arrays | Nested tags |
| Readability | Compact | Verbose |
| Comments | Not allowed | Allowed |
| Common use | Web APIs, configs | Feeds, sitemaps, legacy APIs |
Why Use Our Developer Tools?
- Developer friendly Clean output that is ready to use in code.
- Error detection Highlights invalid input so you can fix it quickly.
- Fast Processes data instantly in the browser or on our server.
- Free Use the tool without an account.
- Works everywhere No IDE or plugin required.
- Privacy Your data is not shared or published.
Tips for Using Development Tools
- Validate data before using it in production.
- Keep sensitive keys and passwords out of shared snippets.
- Use consistent indentation across your project.
- Bookmark the tool for daily debugging.
Development Tools – Worked Example
Example: an API returns one long line of JSON and the app crashes. Pasting it into a JSON Validator reveals a trailing comma on line 1; after removing it, the formatter shows clean, indented data that is easy to debug.
Development Tools Glossary
- JSON
- JavaScript Object Notation – a lightweight data format of keys and values.
- XML
- Extensible Markup Language – a tag-based data format.
- Validation
- Checking that data follows the correct syntax rules.
- Minify
- Removing spaces and line breaks to make data smaller.
- UUID
- A 128-bit identifier that is practically unique.
Helpful Guides for Development Tools
- 📘How to Format and Validate JSON Online (Step-by-Step Guide)Format messy JSON into readable code and validate it for errors online. Learn what valid JSON looks like and how to fix syntax problems.
- 📘JSON vs XML: Differences, Examples and How to ConvertJSON vs XML compared: syntax, size, readability and typical uses, with side-by-side examples and how to convert one into the other.
- 📘Common JSON Errors and How to Fix ThemTrailing commas, single quotes, unescaped characters – the JSON errors developers hit most often and exactly how to fix each one.
- 📘What Is a UUID and When Should You Use One?What a UUID is, how versions 1, 4, 5 and 7 differ, how unique v4 really is and when to use a UUID instead of an auto-increment database ID.
Frequently Asked Questions
Are these developer tools free?
Yes. Every tool in this category is free to use on pdfseotools.com with no sign-up.
Do the tools work on mobile?
Yes. They work in any modern browser on Android, iPhone, Windows and Mac.
Is my data safe?
Yes. Connections use HTTPS and uploaded files are removed after processing.
Do I need to install software or create an account?
No. Everything runs in your web browser on Windows, Mac, Android and iPhone – there is nothing to download, nothing to install and no account to create.
Is there a limit on how often I can use these tools?
You can use the tools as often as you need for normal everyday tasks. Very large files or extreme usage may be limited to keep the service fast for everyone.
Where can I find more free tools?
Open the menu or the categories on pdfseotools.com to browse 150+ free tools for PDFs, images, text, SEO and development.