I built a new "JFIF to JPG Convertor", a super lightweight web tool that converts .jfif images to .jpg directly in your browser — instantly and privately, without uploading anything to a server.
If you’ve ever downloaded images from the web or social media only to find them in the annoying .jfif format, this fixes that with a single click. Everything runs locally in JavaScript, so it’s fast and secure.
Features:
100% client-side (no uploads, no tracking, no cookies)
Instant conversion, even for large batches
Privacy-friendly — your files never leave your device
Minimalist design, mobile-friendly
Works offline once loaded
The goal was to make a clean, open, and privacy-respecting alternative to heavy online converters full of ads and analytics scripts.
Would love your feedback on performance, UI simplicity, or ideas for future improvements (e.g., drag-and-drop batch processing, EXIF handling, or direct rename support).
Try it here: https://jfif-to-jpg.com
seagnson•1h ago
A few technical notes about how JFIF to JPG works:
It’s written in vanilla JavaScript, no frameworks — just an <input type="file">, a canvas, and the browser’s built-in toDataURL("image/jpeg") API.
The conversion happens entirely client-side. The image never leaves your device — not even temporarily. That means full privacy, zero bandwidth use, and instant processing.
The site doesn’t use cookies, analytics, or third-party scripts. It’s intentionally minimal to stay fast and compliant with privacy regulations.
It’s designed to work offline once cached by your browser — ideal for users in low-connectivity areas.
Tech Stack:
HTML5 + JavaScript (no frameworks)
CSS for a simple responsive layout
Hosted on Cloudflare Pages for global CDN + SSL
Upcoming ideas:
Drag-and-drop multiple file support
Preserve EXIF data on conversion
Add a dark mode toggle
Would love to hear your thoughts on privacy-first frontend tools like this — do you prefer pure JS local tools over heavier web apps?