SmartWatermark - Batch watermark 500+ photos without uploading anything

SmartWatermark is a 100% browser-based watermarking tool. No servers. No uploads. All processing runs locally via Web Workers. • Bulk & Fast: Drop hundreds of images (JPEG, PNG, WebP, HEIC). Export as ZIP. • EXIF Shield: Strip GPS data locally, preserve copyright. • Smart Contrast: Watermarks auto-adapt to image brightness. Free to start. Pro license: $29 (one-time payment).

Hey Product Hunt! 👋 I'm Bertrand, the solo dev behind SmartWatermark. Every watermark tool I tried required uploading my photos to unknown servers. As a privacy-conscious developer, that was unacceptable. SmartWatermark processes everything directly in your browser. No upload, no server, no account needed. The engine runs strictly on Web Workers and Canvas 2D. Your files never leave your RAM. The core stack: → Scale: Batch process 500+ images in seconds. → Privacy (EXIF Shield): Strip GPS, keep copyright. → Context-aware: Smart Contrast auto-inverts watermark color. → Resilient: Fully functional offline after first load. Try it with a batch of heavy HEIC files. I'd love your feedback on the client-side memory management and export speed. Try it free: https://app.smartwatermark.app

SmartWatermark - Batch watermark 500+ photos without uploading anything

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