Developers & technical PMs
Free Tools for Developers
Streamline your development workflow with free converter, formatter, and testing utilities. Format and validate JSON, convert CSV to Excel, preview HTML, transform JSON to XML, and clean data without installing another CLI—built for incidents, tickets, and everyday debugging on any machine.
Format, convert, and debug without installing yet another CLI
Challenges we help with
- Broken JSON in support tickets
- One-off conversions between CSV/XML/JSON
- Need quick utilities without npm install
Why free tools fit
- JSON formatter & viewers in the browser
- Converters for everyday data chores
- No signup friction during incidents
Recommended free tools
No signup. Unlimited everyday use. Open any tool instantly.
- JSON ViewerExplore JSON data with tree view, collapsible nodes, and search functionality—100% free, no sign-up required.
- CSV to ExcelConvert CSV files to Excel with delimiter and encoding options. Preview your data before converting—100% free.
- HTML ViewerView HTML with rendered preview, syntax-highlighted source, and search—free in your browser.
- CSV to XMLConvert CSV files to XML with delimiter, encoding, and custom root element options—100% free.
- CSV to JSONConvert CSV files to JSON with delimiter, encoding, and formatting options. Preview syntax-highlighted output—100% free.
- XML to JSONConvert XML data to JSON with syntax highlighting and formatting control—100% free, no sign-up required.
- PHP FormatterFormat PHP with PSR styles, syntax highlighting, and copy—100% free in your browser.
Example workflows
API incident triage
- Paste response into JSON Formatter
- Validate structure
- Share pretty-printed payload in the ticket
What people say
“The JSON formatter is my default when Postman is overkill. Fast and free.”
Samir P. · Backend Engineer
Try These Tools Now
Open any recommended tool above, or browse the full free catalog — no account required.