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Auto OptimizeTry automatic image format comparison with decoded-preview checks. PikoZip can change formats in this tool; inspect quality and actual file sizes before download.Website Ready PackGenerate responsive image sizes with WebP or AVIF and PNG or JPEG fallbacks. Download images, a manifest and picture markup together in one organized ZIP.Image compressorReduce image file size with free batch compression. Keep PNG, JPG, WebP or AVIF, compare before and after, and download up to 30 images in a ZIP.PNG compressorCompress PNG images online with Smart, Balanced, Lossless or palette modes. Preserve PNG format and transparency, compare results and download a free batch.JPEG compressorReduce JPG and JPEG file size free. Use smart compression or manual quality, keep JPEG output, preview details and download up to 30 photos in a ZIP.WebP compressorReduce WebP file size in your browser. Keep WebP output, compare image detail, control dimensions and download a free batch without image uploads.AVIF compressorCompress static AVIF images in your browser. Keep AVIF output, review image quality and dimensions, and download individual results or a batch ZIP.Image converterConvert images between PNG, JPG, WebP and AVIF free. Choose the output format, check transparency and quality, then download one image or a batch ZIP.Convert to PNGConvert JPG, WebP or AVIF images to PNG in your browser. Review transparency and dimensions, compare file sizes and download a free batch of PNG files.
LEARNING CENTER

Understand your next image export.

Learn image formats, compression modes, dimensions and product image preparation. Explore practical PNG, JPEG, WebP and AVIF guides from PikoZip.

Piko exploring an illustrated image guide with a magnifying glass in a forest library

6 results

Formats · 5 min

Image format guide

Compare PNG, JPG, WebP and AVIF for photos, transparent graphics and website images. Choose a format using your actual output and compatibility needs.

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Formats · 4 min

PNG vs JPEG

Compare PNG and JPEG for photos, screenshots and transparent artwork. Understand file size, lossy compression and why converting to PNG cannot restore detail.

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Formats · 4 min

WebP vs AVIF

Compare WebP and AVIF file size, visual quality, transparency and encoding time. Review compatibility and actual exports before choosing a website image format.

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Essentials · 6 min

Image compression explained

Understand lossy and lossless image compression, resizing and target file sizes. Learn why 100 KB is a goal and when keeping the original is the best result.

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Workflows · 5 min

Product image checklist

Prepare product photos and transparent cutouts with an export checklist for dimensions, formats, image quality, filenames and mobile storefront review.

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Research · 8 min

Compression benchmarks

Compare four PNG modes and WebP/AVIF exports with original fixtures, exact file bytes, decoded-pixel checks and a transparent reproduction method.

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Product photograph of an emerald glass bottle, citrus fruit and green leaves
PUT IT INTO PRACTICE

Your own image is the best example.

Try a format, inspect the result, and make the choice that fits your actual project.

  • Real output sizes, not estimated savings
  • A comparison preview before download
  • Adjustable quality and maximum width
Open the image compressor
MAKE A LITTLE ROOM

Your next image, a little lighter.

Choose your format. Find your balance. Take it with you.

Start optimizing