493 tools across 27 categories in a single HTML file. No install, no build step, no dependencies, no account — and no network call, ever. Open the file and it works, on a laptop in a clinic with the router switched off.
Hashing, zipping, compressing, encrypting, stripping EXIF — all of it runs in the page. There is no server to upload to, which is the only privacy guarantee worth trusting.
No CDN, no npm install, no font request, no analytics tag. The ZIP writer, MD5, CRC32, the panchang and the AES envelope are written out inside the file rather than pulled in.
Clinics, classrooms, a train, an old laptop kept offline on purpose. Save the file once and it keeps working, forever, on anything with a modern browser.
Press Ctrl K and search all 493 tools at once, ranked so the obvious match comes first. Pin what you use often; recents are one tap away.
A jsdom suite loads the real file, renders every tool, walks every route, and pins the ported astronomy and crypto to published reference values. It runs on every push.
The panchang says it is approximate. MD5 says it is for legacy checksums only. The calculators say they are not medical, financial or legal advice. Nothing pretends.
No network calls. Not for updates, not for fonts, not for analytics. The test suite fails if a fetch, XHR, WebSocket or EventSource appears anywhere in the file, or if any external src or href is added.
No silent uploads. Files are read with the browser's own FileReader and written back with a download — there is no endpoint to send them to.
No account, no telemetry. There is nothing to sign into and nothing being counted. Whatever a tool remembers lives in this browser's local storage and can be exported or erased from Productivity → Backup & Restore.
Free, offline, accountless — and staying that way. If it earned its keep:
| UPI (India) | drsohilboi@ybl payee Dr. Sohil Momin · any amount |
| Ko-fi | ko-fi.com/matneo |
| PayPal | paypal.me/drsohilmomin |
| My books | Amazon author store |
| More apps | drsamonline.github.io |
| sohilmomin2000@gmail.com |
Nothing is gated behind it: no paid tier, no account, no tracking. Supporting it buys the next version, not a feature.