Zhang Jun

A full stack software engineer

First product launched 20mo ago

Total monthly visits: <5K; Oct 2026 · Below 5K floorAll others besides Every Format are <5K
Public revenue: Undisclosed; No public revenue across products
Products: 3; Since Mar 2025
Latest launch: 18d ago; LingoKeepNo traffic data yet

100% full-depth creator dossier open: complete product portfolio, 12-month combined traffic & MRR curves, shipping cadence, and timeline events.

Products

Products and research metrics
Product	Tagline	Category	Visits · Oct	MoM	Launched	Revenue
Every Formateveryformat.comConvert any image format. Without uploading it.	Convert any image format. Without uploading it.	File Conversion & Compression	<5K	Prev <5K	2026-06	Undisclosed
Bookmark Maestrobookmark-maestro.comThe bookmark manager Chrome extension that cleans up what the years left behind	The bookmark manager Chrome extension that cleans up what the years left behind	Browser & Tab Productivity	<5K	Prev <5K	2025-03	Undisclosed
LingoKeeplingokeep.comLearn Languages Watching YouTube — and Actually Remember	Learn Languages Watching YouTube — and Actually Remember	Language Learning	—	—	2026-10	Undisclosed

Launches, marketing, revenue milestones, and pricing/plan/positioning changes across products