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ALTREPO/DEV TOOLS
INDEX OF /DEV/

Free Online Dev Tools

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├── Cron Expression Generator Free online cron expression generator and parser. Use the visual builder to create cron schedules, or paste cron syntax to instantly translate it to English.
├── Free Invoice Generator Online Create professional invoices instantly in your browser. Live preview, 150+ currencies, taxes, discounts, customizable design, print to PDF. 100% free and local, no sign-up required.
├── JSON Converter - JSON to CSV, YAML and TypeScript Free, local JSON converter that runs entirely in your browser. Convert JSON to CSV, YAML, TypeScript interfaces and JSON Lines, and turn CSV or JSONL back into JSON. The data you paste is never uploaded.
├── JSON Formatter & Editor - Free Online JSON Validator & Viewer A free, private JSON formatter, editor, and validator that runs in your browser. Online JSON viewer to format, pretty print, repair, query and check JSON files safely.
├── JSON Schema Validator - Free Online JSON Validator A fast, free online JSON Schema Validator. Validate your JSON objects against a JSON schema instantly in your browser. Supports Draft 7, Draft 2020-12, and runs securely offline.
├── JWT Decoder Free online JWT Decoder. Decode your JSON Web Tokens instantly. 100% local and offline, ensuring your tokens never leave your browser.
├── llms.txt Generator & Validator Create and validate a spec-shaped llms.txt Markdown index for LLM context. Build curated resource sections, optional links, framework presets, and downloadable output.
├── Robots.txt Generator, Validator & AI Bot Blocker Generate, validate, and test robots.txt rules. Block AI crawlers like GPTBot, audit search bot access, check llms.txt structure, and download clean robots.txt policy files.
├── UI Element Generator Design glassmorphism, neumorphism and iridescent UI elements in your browser. Tune blur, shadows and a holographic rim, preview live, and copy CSS, Tailwind or SCSS.
└── UUID & GUID Generator Free online UUID and GUID generator. Instantly create bulk version 4 (random) and version 1 (timestamp) UUIDs. Includes code snippets for Java, JavaScript, Python, and C#.