Compress Image Online Free — Reduce File Size
Reduce image file size by up to 90% without visible quality loss using ShiftPx's free image compressor. Perfect for optimizing images for websites, email attachments, and social media uploads. Supports JPEG, PNG, and WebP compression with adjustable quality control. Batch compress multiple images at once. Compare original vs compressed size in real-time. No upload — everything runs privately in your browser.
Image Compressor FAQ
How much can I reduce image file size?
Typically 50-90% depending on the original format and quality setting. A 5MB JPEG can often be compressed to under 500KB at 75% quality with minimal visible difference.
What's the best quality setting for compression?
75-85% gives the best balance of small file size and visual quality. For print-quality images, use 90%+. For web thumbnails, 60-70% works great.
How to reduce image size to 100KB or 200KB?
Upload your image to ShiftPx's compressor, then adjust the quality slider downward until the output size matches your target (100KB, 200KB, etc.). The real-time size comparison shows you exactly how big the compressed file will be before you download. For very small targets, also try reducing the image dimensions using our Image Resizer first.
How to compress images for email attachments?
Most email providers limit attachments to 25MB. To compress images for email: upload your photos, set quality to 70-80%, and optionally set a max width of 1920px. This typically reduces a 10MB photo to under 1MB while keeping it sharp enough for viewing. You can batch compress multiple photos and download them as a ZIP file.
Is ShiftPx better than TinyPNG for compression?
ShiftPx offers comparable compression quality to TinyPNG with a major privacy advantage: your images never leave your device. TinyPNG uploads your images to their servers for processing. ShiftPx also supports batch compression, quality control, and multiple output formats — all free with no daily limits.
