OfflineKit - 5 tiny private tools

Your data shouldn't need the cloud.

OfflineKit is five tiny, genuinely useful tools, each a single HTML file. Double-click, use, done. They work with your internet switched off, forever.

Invoice Maker - clean printable invoices with line items, tax and auto-totals. Autosaves in your browser; print straight to PDF.

Image Resizer - resize and convert PNG / JPEG / WebP with a quality slider. Your photos never leave your machine.

CSV to JSON - proper RFC-4180 parsing (quoted fields, embedded commas and newlines), live table preview, both directions.

Text Diff - line-by-line comparison with the same LCS approach git uses. Additions green, removals red.

Password Generator - passwords and word-passphrases from crypto.getRandomValues(), with an entropy readout.

Why single files? Nothing to install, no subscription, auditable (open any file in a text editor - there are no network calls), portable (they live happily on a USB stick), and private by construction: invoices, photos, data and passwords stay on your device.

Works in current Chrome, Edge and Firefox. Free updates for buyers.

Pay what you want - if these tools save you an afternoon, a few dollars says thanks.