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devvkit

devvkit / converters

Image Optimizer

Compress and resize images locally: WebP, JPEG, PNG with quality control.

All processing uses your browser's native image codecs: files never leave your device. PNG output ignores the quality slider (lossless). AVIF is offered only when the browser supports encoding it; WebP is the safest default.

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Compress, resize, and convert images entirely in your browser. Choose WebP, JPEG, or PNG output with quality control and instant size comparisons.

>[x]Features
  • -WebP, JPEG, and PNG output formats
  • -Quality slider for lossy formats
  • -Downscale to a maximum width
  • -Before/after preview with size comparison
  • -Savings percentage vs. the original
  • -All processing uses native browser codecs
>>Use Cases
  • >Preparing images for web performance budgets
  • >Converting screenshots to WebP for smaller assets
  • >Downscaling large photos for email or docs
  • >Comparing format efficiency without uploading files

Frequently Asked Questions

>Are my images uploaded??
No. All image processing uses your browser's native codecs (canvas and toBlob). Files never leave your device.
>Why is PNG output sometimes larger??
PNG is lossless, so photos and complex graphics usually compress worse than WebP or JPEG. Use WebP for the smallest result.