Elke

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.

No sign-up, no usage cap, no paid tier — unlike every other AI Excel tool. What makes it different: • Tell it your Excel version (2016–365) and it won't suggest functions you can't run • Comma or semicolon separator — European Excel gets working formulas, not syntax errors • Regex built for RE2, the engine Excel and Sheets actually use • 336 function pages, each with syntax, 3 worked examples and its real error modes • Every answer names what will break it, not just the formula