Handy dev tools, all local
A deliberate, browser-based workbench. Your code and data stay on this machine.
Code Editor
Monaco editing for common languages and IBM ESQL, with language-aware formatting and a remembered default.
Open editor →HTML Viewer
Write a single HTML file, format it, and inspect a live side-by-side preview.
Open viewer →SQL Workspace
Seed a disposable SQLite database once, then rerun queries without recreating tables.
Open SQL workspace →Converters
Convert YAML, JSON, and XML in either direction with formatted output.
Open converters →Encoding Tools
Base64, Base32, hex, binary, text conversion, and an ASCII reference.
Open encoding tools →Generators
UUIDs, secure strings, mock APIs, project instructions, OpenAPI specs, and ASCII banners.
Open generators →Regex Tester
Test patterns against sample text with live match highlighting and an NFA graph.
Open regex tester →Text Compare
Compare two pieces of text with live word-level highlighting.
Open text compare →Diagrams
Drag-and-drop flowcharts, ER diagrams, and text-based sequence diagrams.
Open diagrams →JSON Tools
Format, minify, and inspect JSON.
Open JSON tools →