A fast, privacy-first image converter that runs in browser

In plain words

ImageConverter.dev is a browser-based image conversion tool that converts between JPG, PNG, and WebP formats entirely on the user's device. Built with Canvas API and WebAssembly, it requires no image uploads, server interaction, or tracking. The tool works offline after initial load thanks to progressive web app support and runs efficiently on mid-range devices. It targets users who need quick, private image conversions without relying on traditional web-based converter sites that throttle speeds or collect data.

written from the facts on this page · September 2026

From the sources

Resize image directly in your browser. Pick a preset size, adjust a custom crop, and download in JPG, PNG, or WebP without uploading anything.

In the maker’s words, at launch

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…

• IB
  I built image converters site that run in the browser2024 · dynapik.com · ▲19

  Hello HN, I've used a lot of image converter websites to run for my daily jobs, but they required uploading my assets on their servers which I didn't like. I decided to build it myself and publish as a website for everyone to use at no cost (since the conversion happened on your browsers) I'd live to hear your thoughts about it. Cheers,

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  Image Converter2025 · resizeimage.dev · ▲14

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