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Sustainability
Open tool Green Office Checklist
Create a bounded, browser-local green office checklist with visible assumptions, review guidance, and downloadable output.
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Events & Weddings
Open tool Guest List Manager
Create a bounded, browser-local guest list manager with visible assumptions, review guidance, and downloadable output.
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File Converters
Open tool HTML Table to Excel
Convert one flat local HTML table into a genuine styled XLSX worksheet.
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File Converters
Open tool HTML to PDF
Convert safe visible HTML structure into a searchable text-first PDF without loading remote assets.
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File Converters
Open tool ICS to JSON
Project common VEVENT properties into stable JSON without expanding recurrences or changing time zones.
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Image Tools
Open tool Image Contact Sheet Maker
Create a labelled visual index for up to twenty images.
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Image Tools
Open tool Image Cropper
Create exact social-media crops with an adjustable focal point.
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Image Tools
Open tool Image Duplicate Finder
Compare 2 to 20 image files locally by SHA-256, identify exact copies and export a JSON report without deleting originals.
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Travel & Logistics
Open tool Jet Lag Planner
Create a bounded, browser-local jet lag planner with visible assumptions, review guidance, and downloadable output.
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Developer & Data
Open tool JSON to CSV
Convert a JSON record array to RFC 4180-style CSV entirely in the browser.
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File Converters
Open tool JSON to INI
Serialize one bounded JSON object as deterministic global INI keys and one-level sections.
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Physics
Open tool Kinetic Energy Calculator
Calculate kinetic energy with guided inputs, visible equations, substituted working, and model assumptions.