prezll is a browser-based editing tool for quickly cropping and adjusting images for social media uploads. Crop to platform-specific ratios like square, vertical feed, and Story, and handle brightness/contrast/saturation adjustments, filters, mosaic, and blur — all on one screen.
A separate GIF Edit screen is also available. Upload a GIF to trim it, change its FPS, crop, resize, and compress it — just like the image editor, processed entirely in your browser with no server involved.
The reason prezll exists is simple. Uploading a single photo to social media shouldn't require installing a separate app, creating an account, or clicking through ads first. prezll starts working the moment you open it in a browser.
Everything happens on your own device. There's no upload step in the traditional sense — image and GIF files are opened and edited entirely in your browser's memory, and nothing is sent anywhere until you press Download. Editing keeps working smoothly even on a slow or unstable connection.
The feature set keeps growing. The image editor currently supports platform-specific ratio cropping, rotate/flip, brightness/contrast/saturation adjustment, filters, mosaic/blur, stickers, text, and resizing, while the GIF editor supports trimming, FPS changes, cropping, resizing, and compression. Both work the same way on desktop and mobile browsers.
prezll is free and requires no sign-up. If you'd like to support the project, you can do so through Ko-fi.
For bug reports or feature suggestions, please message our Telegram bot.