Caesium Web Image Compressor

An image compressor that runs entirely on your browser, completely offline. Powered by libcaesium-wasm. You can try it at caesium.app.

Features

• JPG, PNG and WebP supported
• Lossy and lossless compression
• Keeps images metadata
• Before/after comparison
• Runs entirely on your browser, no images are uploaded or processed on any external server. Try loading the app and then turn off your internet connection to see the magic.

Build

Setup

Make sure to install the dependencies:

npm install

Development Server

Start the development server on http://localhost:3000:

npm run dev

Production

Build the application for production:

npm run build

Locally preview production build:

npm run preview

Run on docker

Build

You can pull the official docker images

docker pull lymphatus/caesium-app-web:latest

or build it yourself

docker build -t caesium-web-app .

Run

docker run -d -p 3000:3000 lymphatus/caesium-app-web:latest

Then you can visit localhost:3000 to start using the app.

Configuration

You can set the following ENV variables to tweak the compressor to your preferences.

• NUXT_PUBLIC_SEND_USAGE_REPORT: (boolean | default: true) send usage stats for the compressed images to the NUXT_PUBLIC_API_ENDPOINT. Set it to false if you don't care about it.
• NUXT_PUBLIC_API_ENDPOINT: (string | default: "") the endpoint where you can send compression stats.
• NUXT_PUBLIC_COMPRESSOR_MAX_FILES: (number | default: 5) how many files are allowed to be added to the list in the same batch.
• NUXT_PUBLIC_COMPRESSOR_MAX_FILE_SIZE: (number | default: 20000000) max limit for each image size, in bytes.