Interview prep
Practice for your next coding interview
Sharpen up with coding problems, timed mock interviews, and system design walkthroughs — all free, right in your browser.
Developer Tools for Every Day
Maximize your productivity with our collection of must-have tools.
3D / OpenSCAD
Design models. Get them ready to print.
Create parametric parts with OpenSCAD, turn images into models, and prepare STL and 3MF files — right in your browser.
New developer workflows
<>JWT Decoder & DebuggerDecode claims, inspect expiry, and verify HS256 signatures locally.<>Log and Privacy WorkbenchParse, group, compare, and redact production log samples.<>Data ExplorerProfile CSV and JSON structure without uploading a dataset.<>API WorkbenchReproduce browser API requests and inspect CORS-aware responses.<>.env ToolkitValidate, compare, and convert environment files in the browser.<>Tool PipelinesChain local transforms into a repeatable browser workflow.
Browse all tools
Encoders
Encode, decode and escape
Formatters
Clean up and inspect code
AI Tools
AI-assisted developer workflows
Generators
Create IDs, data and commands
- UUID / GUID Generator
- Random JSON generator
- Random text generator - lorem ipsum
- Curl Command Generator
- MySQL Command Generator
- Tar Command Generator