Developer Tools

ToolSimpli's developer tools are built to speed up everyday coding tasks without switching between multiple apps or installing extensions. Use the JSON formatter to instantly beautify messy JSON, or the JSON validator to catch syntax errors before they break your application, and the JSON minifier when you need to shrink JSON payloads for production.

Encoding and decoding data is a routine part of development. Our Base64 encoder converts text and files to Base64 in one click, the Base64 decoder reverses the process, and the dedicated Base64 to image converter and image to Base64 converter make it easy to embed images directly in code or extract images from encoded strings.

Shipping faster, lighter code matters for performance. The CSS minifier and JS minifier strip out unnecessary whitespace and comments to shrink file sizes and improve page load times, while the HTML formatter cleans up and indents markup for easier reading and debugging. For generating unique identifiers in databases and APIs, the UUID generator produces valid, random UUIDs instantly.

All developer tools on ToolSimpli run client-side friendly workflows in the browser, require no account, and support copy-paste or file upload where relevant. Whether you're debugging an API response, preparing assets for production, or generating test data, this toolkit is designed to be fast, accurate and free to use as often as you need. Browse the full list below to find the right developer tool for your workflow.