Alternatives
Products that do what PortalPack does
Batch image converter for web (Hero/Inline/Thumb), offline
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Hi! Jampack is a post-processing tool that takes the output of your Static Site Generator (aka SSG) and optimizes it for best user experience and best Core Web Vitals scores. As of today it can: - Optimize local images, CDN images or external images - Optimize above-the-fold vs below-the-fold - Limit images max width - Inline critical CSS - Prefetch links on scroll - Improve browser compatibility - Auto-fixes HTML issues - Warn for HTML accessibility issues - Compress all assets in the end It processes directly the static output so it's compatible with any SSG or framework. We are…
2024 · github.com
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Hey HN I built ImageConverter.dev because I got tired of “free” image converter sites that force uploads, or throttle conversions. So I made a tool that runs 100% client-side — meaning your images never leave your device. It’s built for speed, simplicity, and privacy. What it does Convert images between JPG, PNG, WebP Works offline once loaded (PWA support) How it works It uses the Canvas API and WebAssembly to handle conversions directly in the browser. There’s no upload, no tracking, no server costs, and it’s fast even on mid-range devices. Why I built it I wanted an instant, no-ads,…
Oct 2025 · imageconverter.dev
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Convert multiple images in one click—JPG, PNG, or WebP. Fast
Feb 2026 · goanduse.com
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Batch image converter for Windows — offline, no limits
Jun 2026 · github.com
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Added batch processing and image format conversion
Jan 2026 · img-processing-liard.vercel.app
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20+ image conversion tools that works on your local browser
Jun 2026 · pixelexchanger.com
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Your files, your rules. Convert images and videos
Jul 2026 · omniconvertapp.lovable.app
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