A smaller image is useful only when it still communicates what matters. A product label, a face, and fine lettering deserve more attention than an empty background. ERITHRA’s Image Compressor lets you export an image with a chosen format and quality, then compare the result before committing to it.
Choose a practical starting point
Upload JPEG, PNG, or WebP images and inspect their previews. Select an output format, then enter a quality between 1 and 100. Start around 80 for JPEG or WebP and adjust after viewing the output. The number is an encoder setting, not a percentage reduction or a guarantee that 80 percent of the original information remains.
PNG is available as an output, but the quality setting does not provide the same lossy compression control that it does for JPEG and WebP. Photographs and transparent graphics may therefore need different format choices. JPEG fills transparent areas with white.
For a batch, choose up to 20 files. The same settings apply to every selected image. Keep each input within 20 MB and 40 megapixels, and the combined input/output workload within 100 MB. If the collection is mixed, separate photographs from graphics before processing.
Work through one comparison
Suppose your source photo measures 2400 by 1600 pixels. Choose WebP at quality 80 and process it. Compression preserves those dimensions; it does not automatically make the image 1200 pixels wide. Compare the before/after thumbnails, download the result, and inspect small details at full size.
If the size is still unsuitable, try quality 70 using the original source again. Avoid repeatedly compressing the previous export. Keep the version that balances visible detail with the actual output size shown. No particular number of kilobytes can be predicted from dimensions alone.
Check the export before sharing
Individual downloads and a ZIP make batches easier to collect. Open a few representative outputs, including the most detailed image. A ZIP groups the files; it does not establish that every image became smaller.
Processing stays in your browser. Canvas export may remove metadata and color profiles, and animated inputs become still images. Keep originals for archival use. If an output is larger, retaining the source can be the better choice. Use Image Resizer when excessive dimensions are the problem, or Bulk Image Converter when format consistency is your main objective.