Elke

MailPixel creates a hosted email tracking pixel in one click, with no account and no access to your inbox. Paste the pixel into your email and open a private link to see a timestamped timeline of image requests, then pause or delete it anytime. Gmail users can track right in compose with our Chrome extension. Unlike trackers that promise "read receipts", MailPixel is honest: privacy proxies and caching mean an open is a signal, not proof of a read

Swap faces in photos, reaction GIFs and short videos right in your browser. Free, with no sign-up. What's different: in group GIFs and videos you choose exactly who changes, giving each person their own replacement face while everyone else stays untouched. Start from ready-made templates (yearbook, 80s, business, sports, memes) or upload your own scene, trim videos in-app, and download in seconds.

MathGPT solves maths from text, a photo, or a built-in formula keyboard, and shows every step plus a check at the end. No account, no card — not even for photo uploads. It also checks working you did yourself and names the first line that went wrong.