Image Compressor

Compression quality doesn't behave the same way on every kind of image. A photograph with lots of natural gradients hides JPEG artifacts well even at fairly aggressive settings, while a screenshot or diagram with sharp text edges and flat color blocks shows compression artifacts as visible fuzz around every letter, often at the same quality number that looked fine on a photo. That's the main judgment call this tool's live before/after preview is built to help you make.

How to use it

1. Upload one image, or several at once for batch compression.
2. Choose lossy or lossless compression, then adjust the quality slider while watching the live before/after preview and the resulting file-size estimate.
3. For a photograph, start around 80–85% quality — the visual difference from the original is usually imperceptible at that range. For a thumbnail where file size matters more than fine detail, 60–70% is often enough.
4. For screenshots, diagrams, or anything with sharp text or flat color edges, prefer lossless (PNG or WebP lossless) instead of pushing lossy quality down — lossy artifacts show up worst exactly on high-contrast boundaries like text.
5. For a batch, apply the same settings across every image and review the aggregate size reduction before downloading them all.

Common use cases

• Speeding up a website — images are typically the single biggest contributor to page weight, so compressing a site's photo assets is often the fastest way to cut load time.
• Fitting under an email attachment limit — compressing a large photo down to a size that actually sends.
• Shrinking a photo library for storage — batch-compressing a folder of photos can cut storage needs substantially with minimal visible quality loss.
• Controlling quality before a social platform re-compresses it anyway — most platforms will re-encode an upload regardless, so compressing first at a quality you've chosen beats leaving it entirely to their algorithm.