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Edit, format, validate, and explore JSON with tree and code views.

by Launch Arcade

Paste raw JSON and get clean, formatted output instantly.

by Launch Arcade

Compress JSON into ultra-short URL-friendly strings. Paste JSON, get a crushed version you can share in URLs or query params.

by KilledByAPixel

A browser drum machine and beat sequencer. Program grooves, record patterns, and export your beats as JSON.

by pemmyz

Drop GeoJSON, KML, or GPX files onto an interactive map to visualize geographic data instantly. Everything runs locally.

by makinacorpus

A fun sentence mixing tool — type or paste text, rearrange phonemes, and create hilarious audio mashups right in your browser.

by MysteryPancake

Enter your own words and generate a playable crossword puzzle layout.

by MichaelWehar

Build and simulate electronic circuits with drag-and-drop components including logic gates, LEDs, switches, and more.

by kazuhikoarase

A simple, responsive drawing pad that works on desktop and mobile. Pick colors, adjust brush size, undo strokes, and sketch freely on an HTML5 canvas.

by tsand

Plan custom workouts organized by days and exercise blocks with built-in timers, dark/light themes, and local data persistence with JSON export/import.

by FlorealRISSO

Create, edit, and organize mind maps with expandable nodes, drag-and-drop rearranging, and export options.

by hizzgdev

Offline learning platform for creating and studying interactive capsules with notes, flashcards, and quizzes. All data stays in your browser.

by nargesyaghoubi