About ShareMint
ShareMint is a browser-based tool for resizing images and adding watermarks for social media. Images are never uploaded — all processing happens in your browser.
Features
SNS Image Resize
One-click resize for 14+ platforms including Instagram, X, TikTok, YouTube, and LINE. Focal point-based auto-cropping included.
50-Image Batch Processing
Upload multiple images and process them across all selected presets at once. Per-image preview supported.
Watermark
Supports text, image, and QR code watermarks. Customize font, size, color, position, and opacity.
QR Code Watermark
Auto-generate QR codes from URLs or text and place as watermarks. Auto-calculates recommended sizes.
9 Preset Filters + 7 Adjustments
Preset filters like Vivid, Sepia, and Vintage, plus individual controls for brightness, contrast, saturation, sharpness, temperature, vignette, and blur.
GIF Anti-AI Effects
Export as animated GIF with subtle noise, watermark micro-shift, and hue shift to deter AI training scrapers.
PDF Export
Export resized images as PDF for presentations and print.
Japan SNS Coverage
Covers LINE, note, Hatena Blog, and other platforms popular in Japan that other tools miss.
Design Principles
Complete Privacy
Images are never sent to a server. All processing runs in your browser. No account required.
Fast Processing
Fast image processing with OffscreenCanvas and Web Workers. Never blocks the main thread.
Supported Platforms
Supports 14+ social media and blog platforms.